828 Series
1.0 Hz to 102.4 kHz 2" x 2"
8-Bit Programmable 8-Pole Filters
Description
The 828 Series are digitally programmable low-pass
and high-pass active filters that are tunable over a
256:1 frequency range. 828 filters are available with
any one of five standard factory-set tuning ranges or
8-bit custom ranges from 1.0 Hz to 102.4 kHz.
These units contain 8 CMOS logic inputs.
All 828 Series models are convenient, low profile,
easy to use fully finished filters which require no
external components or adjustments. They feature
low harmonic distortion, and near theoretical phase
and amplitude characteristics. 828 filters operate
from non-critical ± 12 to ± 18 Vdc power supplies,
have a 10 k (min.) input and a 10 (max.) output
impedance.
Features/Benefits:
· Compact 2" x 2" design minimizes board space
requirements.
· Low harmonic distortion and wide signal-to-noise
ratio to 16 bit resolution.
· Digitally programmable corner frequency allows
selecting cut-off frequencies specific to each
application.
· Plug-in ready-to-use, reducing engineering
design and manufacturing cycle time.
Programmable Specifications:. . . . . . . . . . . . . Page
· Factory-set tuning range, no external clocks or Digital Tuning & Control . . . . . . . . . . . . . . . . . . . . . 2
adjustments needed Available Low-Pass Models: . . . . . . . . . . . . . . . . . .
· Broad range of transfer characteristics and corner 828L8B 8-pole Butterworth . . . . . . . . . . . . . . . . . 3
frequencies to meet a wide range of applications. 828L8E 8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . 3
828L8EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . 3
Applications 828L8EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . . 3
· Anti-alias filtering 828L8L 8-pole Bessel. . . . . . . . . . . . . . . . . . . . . 4
828L8D60 8-pole constant delay (-60dB) . . . . . . . . 4
· Data acquisition systems
828L8D80 8-pole constant delay (-80dB) . . . . . . . . 4
· Communication systems and electronics 828L8D10 8-pole constant delay (-100dB) . . . . . . . . 4
· Medical electronics equipment and research Available High-Pass Models: . . . . . . . . . . . . . . . . . .
828H8B 8-pole Butterworth . . . . . . . . . . . . . . . . . 5
· Aerospace, navigation and sonar applications 828H8E 8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . . 5
· Sound and vibration testing 828H8EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . . 5
· Real and compressed time data analysis 828H8EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . . . 5
General Specifications:
· Noise elimination Ordering information . . . . . . . . . . . . . . . . . . . . . . . . 6
· Signal reconstruction Pin-out/package data . . . . . . . . . . . . . . . . . . . . . . . . 6
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
828 Series
Digital Tuning &
8-Bit Programmable Filters Control Characteristics
Digital Tuning Characteristics Pin-Out Key
The digital tuning interface circuits are a parallel set of eight IN Analog Input Signal D7 Tuning Bit 7 (MSB)
(8) 4053 CMOS switches which accept CMOS compatible OUT Analog Output Signal D6 Tuning Bit 6
inputs for the eight tuning bits (D0 - D7). GND Power and Signal Return D5 Tuning Bit 5
+Vs Supply Voltage, Positive D4 Tuning Bit 4
Filter tuning follows the tuning equation given below: -Vs Supply Voltage, Negative D3 Tuning Bit 3
7 6 5 4 Os Offset Adjustment D2 Tuning Bit 2
fc = ( fmax/256 ) [ 1 + D7 x 2 + D6 x 2 + D5 x 2 + D4 x 2 +
3 2 1 0 D1 Tuning Bit 1
D3 x 2 + D2 x 2 + D1 x 2 + D0 x 2 ]
D0 Tuning Bit 0 (LSB)
where D1 - D7 = "0" or "1", and OUT +Vs -Vs
fmax = Maximum tuning frequency;
fc = corner frequency; D7
Minimum tunable frequency = fmax/256 (D0 thru D7 = 0); D6
Minimum frequency step (Resolution) = fmax/256 D5
D4
2.00 GND
Data Input Specifications D3
D2
Input Data Levels (CMOS Logic)
D1
Input Voltage (Vs = 15 Vdc) D0
Low Level In 0 Vdc min. 4 Vdc max.
High Level In 11 Vdc min. 15 Vdc max. 4
IN Os
Input Current Bottom View
-5
High Level In - 10 µA typ. -1 µA max..
-5
Low Level In +10 µA typ. +1 µA max. MSB --- --- --- --- --- --- LSB Bit
Input Capacitance 5 pF typ 7.5 pF max. Weight
7 6 5 4 3 2 1 0
2 2 2 2 2 2 2 2 fc
Input Data Format Frequency Select Bits Corner
Frequency
Positive Logic Logic "1" = +Vs D7 D6 D5 D4 D3 D2 D1 D0
Logic "0" = Gnd
0 0 0 0 0 0 0 0 fmax/256
Bit Weighting (Binary-Coded)
D0 LSB (least significant bit) 0 0 0 0 0 0 0 1 fmax/128
D7 MSB (most significant bit)
0 0 0 0 0 0 1 1 fmax/64
Frequency Range 256 : 1, Binary Weighted
0 0 0 0 0 1 1 1 fmax/32
0 0 0 0 1 1 1 1 fmax/16
0 0 0 1 1 1 1 1 fmax/8
0 0 1 1 1 1 1 1 fmax/4
0 1 1 1 1 1 1 1 fmax/2
1 1 1 1 1 1 1 1 fmax
2
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828 Series
8-Pole
8-Bit Programmable Low-Pass Filters
Model 828L8B 828L8E 828L8EX 828L8EY
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Butterworth Elliptic Elliptic Elliptic
Size 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5"
Range fc, fr 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A Appendix A
Characteristics Page 9 Page 24 Page 23 Page 25
Passband Ripple 0.0 dB ± 0.035 dB - 0.05 dB - 0.05 dB
(theoretical)
DC Voltage Gain 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max.
(non-inverting) 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ.
Stopband
Attenuation Rate 48 dB/octave 80 dB min. 80 dB min. 100 dB min.
Cutoff Frequency fc ± 2% max. fr ± 2% max. fr ± 2% max. fr ± 2% max.
Stability ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c
Amplitude -3 dB -0.035 dB -0.05dB -0.05 dB
Phase -360° -323.5° -414° -419°
Filter Attenuation 0.12 dB 0.80 fc 0.035 dB 1.00 fr 0.05 dB 1.00 fr 0.05 dB 1.00 fr
(theoretical) 3.01 dB 1.00 fc 3.01 dB 1.13 fr 3.01 dB 1.05 fr 3.01 dB 1.06 fr
60.0 dB 2.37 fc 60.0 dB 1.67 fr 60.0 dB 1.45 fr 80.0 dB 1.83 fr
80.0 dB 3.16 fc 80.0 dB 1.77 fr 80.0 dB 1.56 fr 100.0 dB 2.00 fr
Phase Match1 0 - 0.8 fc ± 2° max. 0 - 0.8 fr ± 2° max. 0 - 0.8 fr ± 3° max. 0 - 0.8 fr ± 3° max.
± 1° typ. ± 1° typ. ± 1.5° typ. ± 1.5° typ.
0.8 fc - 1.0 fc ± 3° max. 0.8 fr - 1.0 fr ± 4° max. 0.8 fr - 1.0 fr ± 4° max. 0.8 fr - 1.0 fr ± 4° max.
± 1.5° typ. ± 2° typ. ± 2° typ. ± 2° typ.
Amplitude Accuracy 0 - 0.8 fc ± 0.2 dB max. 0 - 0.8 fr ± .2 dB max. 0 - 0.8 fr ± 0.2 dB max. 0 - 0.8 fr ± 0.2 dB max.
(theoretical) ± 0.1 dB typ. ± .1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ.
0.8 fc - 1.0 fc ± 0.3 dB max. 0.8 fr - 1.0 fr ± .3 dB max. 0.8 fr - 1.0 fr ± 0.5 dB max. 0.8 fr - 1.0 fr ± 0.5 dB max.
± 0.15 dB typ. ± .15 dB typ. ± 0.25 dB typ. ± 0.25 dB typ.
Total Harmonic < - 100 dB typ. < - 88 dB typ. < - 88 dB typ. < - 88 dB typ.
Distortion @ 1kHz
Wide Band Noise 200 µVrms typ. 200 µVrms typ. 250 µVrms typ. 250 µVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 50 µVrms typ. 50 µVrms typ. 75 µVrms typ. 75 µVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly FMA-02A FMA-02A FMA-02A FMA-02A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
3
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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828 Series
8-Pole
8-Bit Programmable Low-Pass Filters
Model 828L8L 828L8D60 828L8D80 828L8D10
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Bessel Constant Delay Constant Delay Constant Delay
Size 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5"
Range fc 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A Appendix A
Characteristics Page 4 Page 20 Page 21 Page 22
Passband Ripple 0.0 dB 0.15 dB 0.15 dB 0.15 dB
(theoretical)
DC Voltage Gain 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max. 0 ± 0.1 dB max.
(non-inverting) 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ. 0 ± 0.05 dB typ.
Stopband
Attenuation Rate 48 dB/octave 60 dB min. 80 dB min. 100 dB min.
Cutoff Frequency fc ± 2% max. fc ± 2% max. fc ± 2% max. fc ± 2% max.
Stability ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c
Amplitude -3 dB -3 dB -3 dB -3 dB
Phase -182° -306° -306° -311°
Filter Attenuation 1.91 dB 0.80 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc
(theoretical) 3.01 dB 1.00 fc 40.0 dB 2.28 fc 60.0 dB 3.08 fc 80.0 dB 4.45 fc
60.0 dB 4.52 fc 60.0 dB 2.64 fc 80.0 dB 3.57 fc 100.0 dB 5.20 fc
80.0 dB 6.07 fc
Phase Match1 0 - fc ± 2° max. 0 - fc ± 2° max. 0 - fc ± 2° max. 0 - fc ± 2° max.
± 1° typ. ± 1° typ. ± 1° typ. ± 1° typ.
Amplitude Accuracy 0 - fc ± 0.2 dB max. 0 - 0.8 fc ± 0.2 dB max. 0 - 0.8 fc ± 0.2 dB max. 0 - 0.8 fc ± 0.2 dB max.
(theoretical) ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ.
0.8 fc - 1.0 fc ± 0.3 dB max. 0.8 fc - 1.0 fc ± 0.3 dB max. 0.8 fc - 1.0 fc ± 0.3 dB max.
± 0.15 dB typ. ± 0.15 dB typ. ± 0.15 dB typ.
Total Harmonic < - 100 dB typ. < - 100 dB typ. < - 100 dB typ. < - 100 dB typ.
Distortion @ 1kHz
Wide Band Noise 200 µVrms typ. 200 µVrms typ. 200 µVrms typ. 200 µVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 50 µVrms typ. 50 µVrms typ. 50 µVrms typ. 50 µVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly FMA-02A FMA-02A FMA-02A FMA-02A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
4
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
828 Series
8-Pole
8-Bit Programmable High-Pass Filters
Model 828H8B 828H8E 828H8EX 828H8EY
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Butterworth Elliptic Elliptic Elliptic
Size 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5" 2.0" x 2.0" x 0.5"
Range fc, fr 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz 1.0 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A Appendix A
Characteristics Page 29 Page 37 Page 36 Page 38
Passband Ripple 0.0 dB ± 0.035 dB - 0.05 dB - 0.05 dB
(theoretical)
Voltage Gain 0 ± 0.2 dB to 100 kHz 0 ± 0.2 dB to 100 kHz 0 ± 0.2 dB to 100 kHz 0 ± 0.2 dB to 100 kHz
(non-inverting) 0 ± 0.5 dB to 120 kHz 0 ± 0.5 dB to 120 kHz 0 ± 0.5 dB to 120 kHz 0 ± 0.5 dB to 120 kHz
Power Bandwidth 120 kHz 120 kHz 120 kHz 120 kHz
Small Signal (-6 dB) 1 MHz (-6 dB) 1 MHz (-6 dB) 1 MHz (-6 dB) 1 MHz
Bandwidth
Stopband
Attenuation Rate 48 dB/octave 80 dB 80 dB 100 dB
Cutoff Frequency fc ± 2% max. fr ± 2% max. fr ± 2% max. fr ± 2% max.
Stability ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c ± 0.01% /°c
Amplitude -3 dB -0.035 dB -0.05dB -0.05 dB
Phase -360° -323.5° -414° -419°
Filter Attenuation 80 dB 0.31 fc 80 dB 0.56 fr 80 dB 0.64 fr 100 dB 0.50 fr
(theoretical) 60.0 dB 0.42 fc 60.0 dB 0.60 fr 60.0 dB 0.69 fr 80.0 dB 0.55 fr
3.01 dB 1.00 fc 3.01 dB 0.88 fr 3.01 dB 0.95 fr 3.01 dB 0.94 fr
0.00 dB 2.00 fc 0.03 dB 1.00 fr 0.03 dB 1.00 fr 0.03 dB 1.00 fr
0.00 dB 2.00 fr 0.00 dB 2.00 fr 0.00 dB 2.00 fr
Phase Match1 fc - 100 kHz ± 3° max. fr - 1.25 fr ± 4° max. fr - 1.25 fr ± 4° max. fr - 1.25 fr ± 4° max.
± 1.5° typ. ± 2° typ. ± 2° typ. ± 2° typ.
1.25 fr-100 kHz ± 2° max. 1.25fr -100 kHz ± 2° max. 1.25 fr-100 kHz ± 3° max.
± 1° typ. ± 1° typ. ± 1.5° typ.
Amplitude Accuracy fc-1.25 fc ± 0.3 dB max. fr-1.25 fr ± 0.3 dB max. fr -1.25 fr ± 0.5 dB max. fr -1.25 fr ± 0.5 dB max.
(theoretical) ± 0.15 dB typ. ± 0.15 dB typ. ± 0.25 dB typ. ± 0.25 dB typ.
1.25 fc-100kHz± 0.2 dB max. 1.25 fr-100 kHz ± 0.2 dB max. 1.25 fr-100 kHz ± 0.2 dB max. 1.25 fr-100 kHz ± 0.2 dB max.
± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ.
Total Harmonic < - 100 dB typ. < - 88 dB typ. < - 88 dB typ. < - 88 dB typ.
Distortion @ 1kHz
Wide Band Noise 400 µVrms typ. 400 µVrms typ. 500 µVrms typ. 500 µVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 100 µVrms typ. 100 µVrms typ. 150 µVrms typ. 150 µVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly FMA-02A FMA-02A FMA-02A FMA-02A
1.Unit to unit match for the same transfer function, set to the same frequency and operating configuration, and from the same manufacturing lot.
5
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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828 Series
Specification Pin-Out and Package Data
(25°C and Vs ± 15 Vdc) Ordering Information
Analog Input Characteristics1 Pin-Out & Package Data
Impedance 10 k min.
Voltage Range ± 10 Vpeak 2.00
Max. Safe Voltage ±Vs G-3
Analog Output Characteristics 0.5
Impedance (Closed Loop) 11 typ.
10 max. 0.15 min.
Linear Operating Range ±10V 0.025 Dia. Side View
2
Maximum Current ±2 mA
3 All dimensions are in inches
Offset Voltage 22 mV typ.
All Case Dimensions ± 0.02"
20 mV max. Grid Dimensions 0.1" x 0.1"
Offset Temp. Coeff. 50 µV/°C OUT +Vs -Vs
Power Supply (±Vs)
D7
Rated Voltage ±15 Vdc
D6
Operating Range ±12 to ±18 Vdc
D5
Maximum Safe Voltage ±18 Vdc
D4
Quiescent Current
2.00 GND
8 Pole ±25 mA typ.
D3
±40 mA max.
D2
Temperature
D1
Operating -20 to +70°C
D0
Storage -25 to +85°C
4
IN Os
Notes:
1. Input and output signal voltage referenced to supply common. Bottom View
2. Output is short circuit protected to common.
Filter Mounting Assembly-See FMA-02A
DO NOT CONNECT TO ±Vs.
3. Adjustable to zero.
4. Units operate with or without offset pin connected.
Ordering Information
Filter Type Transfer Function
DC Offset Adjustment L - Low Pass B - Butterworth
H - High Pass L - Bessel
+ Vs D60 - constant delay (-60 dB)
D80 - constant delay (-80 dB)
D10 - constant delay (-100 dB)
Do not connect
if trim is not
E - elliptic 1.77 (-80 dB)
required.
828L8E-3 EX- elliptic 1.56 (-80dB)
EY - elliptic 2.00 (-100 dB)
20 k Model Number
OS
(Cermet)
e.g.,Model Tuning Minimum
Number Range (Hz) Step(Hz) Case
2 1.0 to 256 1.0 G-3
3 10 to 2560 10 G-3
4 100 to 25.6k 100 G-3
- Vs 5 200 to 51.2k 200 G-3
6 400 to 102.4k 400 G-3
We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements,
recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. We assume no responsibility for the use of these statements,
recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyright. IN-00828-00
6
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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Product Handling
Procedure
Programmable Filter Modules Power Sequence & ESD
November 2000
Programmable Filters Modules
818, 824, 828, 828BP, 828BR, 854, 858, R854, R858
I. Scope
The following precautions are necessary when handling and installing Frequency Devices
programmable filter modules.
II. Digital Circuit Description
The digital input pins connect directly to 4000 series CMOS logic, such as the 4053 analog switch. The
power supply (Vss) for the digital logic on the module comes directly from the +15 Volt pin on the
module. This sets the threshold voltage at 11.0 V minimum to 15.0 V maximum for a "1" (High) level
and 0.0 V minimum to 4.0 V maximum for a "0" (Low) level. Applying a voltage between 4.0 and 11.0
V will produce unpredictable operation. Connecting 5 Volt or 3.3 V logic devices directly to the filter
module without using a voltage translator will result in erratic operation of the filter.
III. (VERY IMPORTANT) Power-Up and Power-Down Sequence
Do not plug-in or un-plug module while power is applied. It is imperative that power is
supplied to the + 15 V pin on the filter module before or at the same instance that any digital pin is
pulled High (> 0.0 V). Failure to do this will result in excessive current flowing through the digital input
pin and through a protection diode internal to the 4000 logic, which will result in damage to the module.
The proper power-up and power-down sequence is:
1. Connect filter module ground.
2. Connect filter module +15 V.
3. Connect filter module -15 V.
4. Connect the input signal.
All four of the above steps can also occur simultaneously. Power-down should occur in the reverse
order.
IV. ESD Issues
Like most modern electronic equipment, the modules can be damaged by electrostatic discharge (ESD).
The modules are shipped from the factory in sealed, anti-static packaging and should be kept in the
sealed package prior to mounting on a circuit board. The following additional rules should also be
observed when handling the modules after they are removed from the factory packaging:
1. Only a person wearing a properly grounded wrist strap should handle the modules.
2. Any work surface that the modules are placed on must be properly ESD grounded.
3. Any insulating materials capable of generating static charge (such as paper) should be kept
away from the modules.
Static generating clothing should be covered with an ESD-protective smock.
1
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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8-Pole
Bessel
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .506
Amp (dB)
0.10 -0.029 -18.2 .506 -40
0.20 -0.117 -36.4 .506
0.30 -0.264 -54.7 .506 -60
0.40 -0.470 -72.9 .506
0.50 -0.737 -91.1 .506
-80
0.60 -1.06 -109 .506
0.70 -1.45 -128 .506 -100
0.80 -1.91 -146 .506 2 3 4 5 6 78
0.85 -2.16 -155 .506 0.1 1.0 2 3 4 5 6 7 10.0
0.90 -2.42 -164 .506 Normalized Frequency(f/fc)
0.95 -2.71 -173 .506
1.00 -3.01 -182 .506
1.10 -3.67 -200 .506 Delay (Normalized)
1.20 -4.40 -219 .506
1.30 -5.20 -237 .506 1.0
1.40 -6.10 -255 .505
Delay (sec)
1.50 -7.08 -273 .504
1.60 -8.16 -291 .502
1.70 -9.36 -309 .498
1.80 -10.7 -327 .492 0.5
1.90 -12.1 -345 .482
2.00 -13.7 -362 .468
2.25 -18.1 -402 .417
2.50 -23.1 -436 .352
2.75 -28.3 -465 .291 0.0
0.15 2 3 4 5 6 7 89 1.5
0.1 1.0
3.00 -33.4 -489 .241 Normalized Time (1/f sec)
3.25 -38.3 -509 .201
3.50 -43.1 -526 .170
4.00 -51.8 -552 .126
5.00 -66.8 -587 .077 Step Response
Step Response (V/V)
6.00 -79.2 -610 .052 1.2
7.00 -89.8 -626 .038 1.0
8.00 -99.0 -638 .029
9.00 -107 -647 .023 0.8
10.0 -114 -655 .018
0.6
0.4
0.2
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
4
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Low-Pass
8-Pole
Appendix A Butterworth
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .816
Amp (dB)
0.10 0.00 -29.4 .819 -40
0.20 0.00 -59.0 .828
0.30 0.00 -89.1 .843 -60
0.40 0.00 -120 .867
0.50 0.00 -152 .903
-80
0.60 -0.001 -185 .956
0.70 -0.014 -221 1.04 -100
0.80 -0.121 -261 1.19 2 3 4 5 6 78 1.0 2 3 4 5 67
0.85 -0.311 -283 1.29 0.1 10.0
0.90 -0.738 -307 1.40 Normalized Frequency(f/fc)
0.95 -1.58 -333 1.48
1.00 -3.01 -360 1.46
1.10 -7.48 -408 1.17 Delay (Normalized)
1.20 -12.9 -445 .873 2.0
1.30 -18.2 -472 .672
1.40 -23.4 -494 .540
Delay (sec)
1.50 -28.2 -511 .448
1.60 -32.7 -526 .380
1.70 -36.9 -539 .328 1.0
1.80 -40.8 -550 .287
1.90 -44.6 -560 .253
2.00 -48.2 -568 .226
2.25 -56.3 -586 .174
2.50 -63.7 -600 .139 0.0
2.75 -70.3 -611 .113 0.1 0.15 2 3 4 5 6 7 8 9 1.0 1.5
3.00 -76.3 -621 .094 Normalized Time (1/f sec)
3.25 -81.9 -629 .080
3.50 -87.1 -635 .069
4.00 -96.3 -646 .052
5.00 -112 -661 .033 Step Response
Step Response (V/V)
6.00 -125 -671 .023 1.2
7.00 -135 -678 .017
8.00 -144 -683 .013 1.0
9.00 -153 -687 .010 0.8
10.0 -160 -691 .008
0.6
0.4
0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
9
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Constant Delay
Appendix A Low-Pass (60 dB)
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .776
Amp (dB)
0.10 0.005 -28.0 .776 -40
0.20 0.012 -55.9 .776
0.30 0.005 -83.9 .776 -60
0.40 -0.042 -112 .776
0.50 -0.161 -140 .776 -80
0.60 -0.384 -168 .776
0.70 -0.745 -196 .776 -100
0.80 -1.28 -224 .776 2 3 4 5 6 78
0.85 -1.62 -238 .776 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -2.02 -252 .776
0.95 -2.48 -265 .775
1.00 -3.01 -279 .773
1.10 -4.29 -307 .766 Delay (Normalized)
1.20 -5.91 -334 .749
1.0
1.40 -10.3 -386 .675
1.60 -15.9 -431 .558
Delay (sec)
1.80 -22.4 -467 .443
2.00 -29.4 -495 .351
2.25 -39.0 -523 .268
0.5
2.50 -50.5 -544 .212
2.75 -78.0 -561 .171
3.00 -63.7 -395 .142
3.25 -63.5 -407 .119
3.50 -66.9 -417 .102
0.0
3.75 -74.7 -425 .088 0.1 0.15 2 3 4 5 6 7 89
1.0 1.5
4.00 -85.0 -253 .077 Normalized Time (1/f sec)
4.25 -72.0 -259 .068
4.50 -67.9 -265 .060
4.75 -65.8 -270 .054
Step Response
5.00 -64.6 -275 .048
Step Response (V/V)
5.25 -63.9 -279 .044 1.2
5.50 -63.5 -283 .040 1.0
5.75 -63.3 -286 .036
6.00 -63.2 -289 .033 0.8
6.50 -63.3 -295 .028 0.6
7.00 -63.7 -299 .024
8.00 -64.7 -307 .019 0.4
9.00 -66.0 -313 .015 0.2
10.0 -67.3 -318 .012
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
20
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Constant Delay
Appendix A Low-Pass (80 dB)
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .852
Amp (dB)
0.10 0.017 -30.7 .852 -40
0.20 0.058 -61.3 .852
0.30 0.099 -92.0 .852 -60
0.40 0.105 -123 .852
0.50 0.034 -153 .852 -80
0.60 -0.157 -184 .852
0.70 -0.510 -215 .852 -100
0.80 -1.07 -245 .851 2 3 4 5 6 78
0.85 -1.44 -261 .850 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -1.89 -276 .849
0.95 -2.41 -291 .846
1.00 -3.01 -306 .841
1.10 -4.50 -336 .821 Delay (Normalized)
1.20 -6.39 -365 .783
1.0
1.40 -11.3 -417 .656
1.60 -17.1 -459 .512
Delay (sec)
1.80 -23.2 -492 .396
2.00 -29.1 -517 .312
2.25 -36.3 -542 .239
0.5
2.50 -43.4 -561 .189
2.75 -50.3 -576 .153
3.00 -57.6 -589 .127
3.25 -62.5 -599 .107
3.50 -75.4 -608 .092
0.0
3.75 -98.3 -616 .079 0.1 0.15 2 3 4 5 6 7 89
1.0 1.5
4.00 -86.3 -442 .069 Normalized Time (1/f sec)
4.25 -84.1 -448 .061
4.50 -85.1 -454 .054
4.75 -87.9 -458 .049
Step Response
5.00 -92.8 -462 .044
Step Response (V/V)
5.25 -104 -466 .040 1.2
5.50 -101 -289 .036 1.0
5.75 -93.3 -293 .033
6.00 -89.9 -295 .030 0.8
6.50 -86.6 -300 .026 0.6
7.00 -85.1 -305 .022
8.00 -84.1 -312 .017 0.4
9.00 -84.3 -317 .013 0.2
10.0 -84.9 -321 .011
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
21
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Constant Delay
Appendix A Low-Pass (100 dB)
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec) -20
0.00 0.00 0.00 .865
Amp (dB)
0.10 0.015 -31.1 .865 -40
0.20 0.051 -62.3 .865 -60
0.30 0.085 -93.4 .865
0.40 0.085 -125 .865 -80
0.50 0.010 -156 .865 -100
0.60 -0.182 -187 .865
0.70 -0.532 -218 .865 -120
0.80 -1.09 -249 .864 2 3 4 5 678 2 3 4 5 67
0.85 -1.45 -265 .863 0.1 1.0 10.0
Normalized Frequency(f/fc)
0.90 -1.89 -280 .861
0.95 -2.41 -296 .857
1.00 -3.01 -311 .851
1.10 -4.50 -341 .828 Delay (Normalized)
1.20 -6.38 -370 .785
1.0
1.40 -11.2 -422 .650
1.60 -16.8 -464 .504
Delay (sec)
1.80 -22.5 -496 .389
2.00 -28.0 -520 .306
2.25 -34.5 -544 .235
0.5
2.50 -40.5 -563 .186
2.75 -46.1 -578 .151
3.00 -51.4 -591 .125
3.50 -61.5 -610 .090
4.00 -71.2 -624 .068
0.0 0.15 2 3 4 5 6 7 89
4.50 -81.3 -635 .054 0.1 1.0 1.5
5.00 -93.4 -643 .043 Normalized Time (1/f sec)
5.50 -142 -651 .036
6.00 -105 -476 .030
6.20 -105 -478 .028
Step Response
6.50 -106 -481 .025
Step Response (V/V)
7.00 -110 -486 .022 1.2
8.00 -122 -312 .017 1.0
9.00 -109 -318 .013
10.0 -106 -322 .011 0.8
12.0 -105 -328 .007 0.6
14.0 -106 -333 .005
16.0 -107 -336 .004 0.4
18.0 -108 -339 .003 0.2
20.0 -109 -341 .003
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency -0.2
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc).
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
22
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.56
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 0.823
Amp (dB)
0.10 -0.001 -29.7 0.829 -40
0.20 -0.013 -59.8 0.844
0.30 -0.040 -90.5 0.865
0.40 -0.049 -122 0.904 -60
0.50 -0.018 -156 0.972 -80
0.55 -0.003 -174 1.016
0.60 -0.002 -192 1.064 -100
0.65 -0.019 -212 1.116 2 3 4 5 6 78 2 3 4 5 67
0.70 -0.042 -233 1.178 0.1 1.0 10.0
0.75 -0.049 -255 1.264 Normalized Frequency(f/fc)
0.80 -0.026 -279 1.388
0.85 -0.001 -305 1.557
0.90 -0.024 -335 1.767
0.95 -0.045 -369 2.111 Delay (Normalized)
1.00 -0.050 -414 3.062 4.0
1.10 -10.48 -531 2.043
1.20 -25.96 -576 0.814
Delay (sec)
1.30 -39.45 -598 0.493
1.40 -52.87 -614 0.348
1.50 -69.11 -624 0.265 2.0
1.60 -89.09 -453 0.211
1.70 -85.32 -459 0.174
1.75 -89.95 -463 0.156
1.80 -103.5 -465 0.147 0.8
1.85 -95.94 -288 0.158
1.90 -89.31 -290 0.126 0.0 0.15 2 3 4 5 6 7 89
1.95 -86.44 -292 0.117 0.1 1.0 1.5
2.00 -84.96 -295 0.110 Normalized Time (1/f sec)
2.20 -84.54 -302 0.087
2.40 -88.65 -307 0.069
2.60 -99.78 -311 0.057 Step Response
2.80 -99.97 -135 0.048
Step Response (V/V)
3.00 -90.20 -139 0.041 1.2
3.50 -85.09 -145 0.029
4.00 -84.04 -150 0.022 1.0
5.00 -84.76 -156 0.014 0.8
6.00 -86.45 -160 0.009
7.00 -88.31 -163 0.007 0.6
8.00 -90.11 -165 0.005 0.4
9.00 -91.82 -167 0.004
10.0 -93.41 -168 0.003 0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
23
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.77
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 0.713
Amp (dB)
0.10 -0.004 -25.7 0.716 -40
0.20 -0.014 -51.6 0.724
0.30 -0.024 -77.9 0.740
0.40 -0.020 -105 0.767 -60
0.50 0.007 -133 0.811 -80
0.55 0.022 -148 0.840
0.60 0.033 -163 0.872 -100
0.65 0.031 -179 0.908
2 3 4 5 6 78
0.70 0.014 -196 0.946 0.1 1.0 2 3 4 5 6 7 10.0
0.75 -0.015 -213 0.989 Normalized Frequency(f/fc)
0.80 -0.041 -232 1.04
0.85 -0.046 -251 1.12
0.90 -0.016 -272 1.23
0.95 -0.025 -296 1.40 Delay (Normalized)
1.00 -0.035 -323 1.65 4.0
1.10 -1.76 -392 2.14
1.20 -8.28 -467 1.86
Delay (sec)
1.30 -18.4 -522 1.19
1.40 -29.3 -558 0.753
1.50 -40.1 -578 0.517 2.0
1.60 -51.5 -594 0.381
1.70 -65.2 -606 0.296
1.75 -75.0 -611 0.265
1.80 -113.0 -616 0.239 0.8
1.85 -83.6 -440 0.217
1.90 -82.0 -444 0.198 0.0
0.15 2 3 4 5 6 7 89
1.95 -83.7 -447 0.182 0.1 1.0 1.5
2.00 -87.8 -450 0.168 Normalized Time (1/f sec)
2.20 -85.8 -280 0.126
2.40 -82.0 -289 0.099
2.60 -83.5 -295 0.081 Step Response
2.80 -88.2 -301 0.067
Step Response (V/V)
3.00 -99.9 -305 0.057 1.2
3.50 -87.2 -134 0.040
4.00 -83.1 -140 0.030 1.0
5.00 -82.1 -148 0.018 0.8
6.00 -83.1 -154 0.013
7.00 -84.6 -157 0.009 0.6
8.00 -86.2 -160 0.007 0.4
9.00 -87.8 -163 0.005
10.0 -89.3 -164 0.004 0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
24
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 2.00
Appendix A Low-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec) -20
0.00 0.00 0.00 0.885
Amp (dB)
0.10 -0.001 -31.9 0.891 -40
0.20 -0.015 -64.2 0.903
0.30 -0.040 -97.0 0.922 -60
0.40 -0.042 -131 0.958 -80
0.50 -0.001 -166 1.020
0.55 0.000 -185 1.057 -100
0.60 -0.007 -204 1.099
0.65 -0.027 -225 1.140 -120
2 3 4 5 6 78
0.70 -0.045 -245 1.193 0.1 1.0 2 3 4 5 6 7 10.0
0.75 -0.040 -268 1.269 Normalized Frequency(f/fc)
0.80 -0.014 -291 1.377
0.85 -0.001 -317 1.513
0.90 -0.031 -346 1.677
0.95 -0.036 -378 1.960 Delay (Normalized)
1.00 -0.046 -419 2.681 4.0
1.10 -7.910 -525 2.127
1.20 -21.06 -573 0.856
Delay (sec)
1.30 -31.96 -597 0.509
1.40 -41.51 -612 0.357
1.50 -50.35 -623 0.271 2.0
1.60 -58.90 -632 0.216
1.70 -67.54 -639 0.177
1.75 -72.04 -642 0.162
1.80 -76.79 -645 0.149 0.8
1.85 -81.93 -647 0.138
1.90 -87.78 -650 0.128 0.0
0.15 2 3 4 5 6 7 89
1.95 -95.04 -652 0.119 0.1 1.0 1.5
2.00 -106.6 -654 0.111 Normalized Time (1/f sec)
2.20 -106.0 -481 0.087
2.40 -121.3 -307 0.070
2.60 -106.5 -311 0.058 Step Response
2.80 -105.0 -315 0.049
Step Response (V/V)
3.00 -106.4 -318 0.042 1.2
3.50 -123.6 -325 0.030
4.00 -111.5 -149 0.022 1.0
5.00 -105.4 -156 0.014 0.8
6.00 -105.1 -160 0.010
7.00 -106.0 -163 0.007 0.6
8.00 -107.3 -165 0.005 0.4
9.00 -108.6 -167 0.004
10.0 -110.0 -168 0.003 0.2
1.Normalized Group Delay: -0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided 0 1 2 3 4 5
by the actual corner frequency (fc). Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
25
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
High-Pass
8-Pole
Appendix A Butterworth
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -160 691 0.819
Amp (dB)
0.20 -112 661 0.828 -40
0.30 -83.7 631 0.843
0.40 -63.7 600 0.867 -60
0.50 -48.2 568 0.903
0.60 -35.5 535 .956 -80
0.70 -24.8 499 1.04
0.80 -15.6 459 1.19 -100
0.85 -11.6 437 1.29 2 3 4 5 6 78
0.90 -8.06 413 1.40 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.95 -5.15 386 1.48
1.00 -3.01 360 1.46
1.20 -0.229 275 0.873
1.40 -0.020 226 0.540
1.60 -0.002 194 0.380
1.80 0.00 170 0.287
2.00 0.00 152 0.226
2.50 0.00 120 0.139
3.00 0.00 99.2 0.094
4.00 0.00 74.0 0.052
5.00 0.00 59.0 0.033
6.00 0.00 49.0 0.023
7.00 0.00 42.1 0.017
8.00 0.00 36.8 0.013
9.00 0.00 32.7 0.010
10.0 0.00 29.4 0.008
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
29
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.56
Appendix A High-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -93.4 168 0.334
Amp (dB)
0.20 -84.8 156 0.344 -40
0.30 -86.0 143 0.363
0.40 -92.6 310 0.392 -60
0.50 -85.0 295 0.439
0.55 -114 287 0.472 -80
0.60 -84.1 458 0.515
0.70 -57.0 617 0.652 -100
0.80 -32.8 589 0.962 2 3 4 5 6 78
0.85 -22.6 569 1.325 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -12.3 538 2.198
0.95 -3.08 483 3.993
1.00 -0.05 414 3.062
1.10 -0.03 341 1.498
1.20 -0.01 296 1.039
1.30 -0.04 264 0.773
1.40 -0.05 239 0.612
1.50 -0.03 219 0.505
1.60 -0.01 202 0.426
1.70 0.00 188 0.364
1.80 0.00 176 0.315
1.90 -0.01 165 0.275
2.00 -0.02 156 0.243
2.50 -0.05 122 0.145
3.00 -0.05 101 0.097
4.00 -0.03 75.1 0.053
5.00 -0.01 59.8 0.034
6.00 -0.01 49.7 0.023
7.00 0.00 42.5 0.017
8.00 0.00 37.2 0.013
9.00 0.00 33.0 0.010
10.0 0.00 29.7 0.008
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
36
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 1.77
Appendix A High-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -89.3 164 0.440
Amp (dB)
0.20 -82.1 148 0.459 -40
0.30 -90.6 131 0.495
0.40 -82.4 292 0.559 -60
0.50 -87.8 450 0.671
0.55 -90.0 437 0.761 -80
0.60 -60.2 603 0.890
0.70 -32.4 563 1.37 -100
0.80 -13.1 498 2.35 2 3 4 5 6 78 1.0 2 3 4 5 67
0.85 -6.28 451 2.77 0.1 10.0
Normalized Frequency(f/fc)
0.90 -2.21 401 2.66
0.95 -0.51 358 2.15
1.00 -0.03 324 1.64
1.10 -0.01 277 1.04
1.20 -0.05 225 0.757
1.30 -0.03 221 0.596
1.40 0.01 201 0.486
1.50 0.03 185 0.409
1.60 0.03 172 0.347
1.70 0.03 160 0.299
1.80 0.02 150 0.260
1.90 0.01 141 0.229
2.00 0.01 133 0.203
2.50 -0.02 105 0.123
3.00 -0.02 86.9 0.083
4.00 -0.02 64.7 0.046
5.00 -0.01 51.6 0.029
6.00 -0.01 42.9 0.020
7.00 -0.01 36.8 0.015
8.00 -0.01 32.1 0.011
9.00 -0.01 28.6 0.009
10.0 0.00 25.7 0.007
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
37
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
8-Pole, 6-Zero
Elliptic, 2.00
Appendix A High-Pass
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec) -20
0.10 -110 168 0.338
Amp (dB)
0.20 -105 156 0.348 -40
0.30 -114 323 0.367 -60
0.40 -110 309 0.397
0.50 -107 654 0.445 -80
0.55 -78.6 646 0.480 -100
0.60 -64.6 637 0.524
0.70 -44.1 615 0.669 -120
0.80 -26.7 586 1.001 2 3 4 5 6 78
0.85 -18.2 565 1.401 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.90 -9.46 533 2.315
0.95 -2.16 478 3.604
1.00 -0.046 419 2.681
1.10 -0.038 352 1.416
1.20 -0.001 308 1.018
1.30 -0.032 277 0.773
1.40 -0.046 252 0.618
1.50 -0.034 231 0.514
1.60 -0.016 214 0.436
1.70 -0.004 200 0.376
1.80 0.000 187 0.328
1.90 -0.003 176 0.288
2.00 -0.010 166 0.255
2.50 -0.042 131 0.153
3.00 -0.045 108 0.103
4.00 -0.028 80.6 0.057
5.00 -0.015 64.2 0.036
6.00 -0.008 53.4 0.025
7.00 -0.005 45.7 0.018
8.00 -0.003 40.0 0.014
9.00 -0.002 35.5 0.011
10.0 -0.001 31.9 0.009
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
38
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