428 Series
10 Hz - 102.4 kHz 32-Pin DIP
4-Bit Programmable 8-Pole Filters
Description
The 428 Series are 8-pole digitally programmable
low-pass and high-pass active filters. These new
filters take advantage of the company's proprietary
designs using surface-mount technology to provide
a low profile, compact package in minimal board
space. 428 filters are factory tuned to one of ten
preset 4-bit binary ranges from 10 Hz to 102.4 kHz.
Contact the factory for custom discrete tuning
ranges, maximum span 1000:1.
All 428 Series models are easy to use fully finished
filters which require no external components or
adjustment. They feature low harmonic distortion,
near theoretical phase and amplitude characteristics
and operate over a dynamic input voltage range
from non-critical ±12V to ±18V power supplies.
Features/Benefits:
· Low harmonic distortion and wide signal-to-noise
ratio to 16-bit resolution.
· Compact 1.8"L x 0.8"W x 0.3"H min. (32-pin DIP
footprint) minimizes board space requirements.
· 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 tuned, no external clocks or adjustments Digital Tuning & Control . . . . . . . . . . . . . . . . . . . . . . . 2
needed. Available Low-Pass Models: . . . . . . . . . . . . . . . . . . .
428L4B 8-pole Butterworth . . . . . . . . . . . . . . . . . . 3
· Broad range of transfer characteristics and corner 428L4E 8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . . . 3
frequencies to meet a wide range of applications. 428L4EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . . . 3
Applications 428L4EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . . . . 3
428L4L 8-pole Bessel . . . . . . . . . . . . . . . . . . . . . . 4
· Anti-alias filtering 428L4D60 8-pole constant delay (-60dB). . . . . . . . . . 4
· Data acquisition systems 428L4D80 8-pole constant delay (-80dB). . . . . . . . . . 4
· Communication systems and electronics 428L4D10 8-pole constant delay (-100dB) . . . . . . . . . 4
· Medical electronics equipment and research Available High-Pass Models: . . . . . . . . . . . . . . . . . .
428H4B 8-pole Butterworth . . . . . . . . . . . . . . . . . . 5
· Aerospace, navigation and sonar applications 428H4E 8-pole, 6 zero elliptic, 1.77 (-80dB) . . . . . . 5
· Acoustic and vibration analysis and control 428H4EX 8-pole, 6 zero elliptic, 1.56 (-80dB) . . . . . . 5
428H4EY 8-pole, 6 zero elliptic, 2.00 (-100dB) . . . . . 5
· Real and compressed time data analysis
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
428 Series
Digital Tuning &
4-Bit Programmable Filters Control Characteristics
Digital Tuning Characteristics Pin-Out Key
The digital tuning interface circuits are a parallel set of CMOS IN Analog Input Signal D3 Tuning Bit 3 (MSB)
switches which accept CMOS compatible inputs for the four
tuning bits (D0 - D3). OUT Analog Output Signal D2 Tuning Bit 2
GND Power and Signal Return D1 Tuning Bit 1
Binary Tuning Range
+Vs Supply Voltage, Positive D0 Tuning Bit 0 (LSB)
MSB --- --- LSB Bit
Weight -Vs Supply Voltage, Negative +5V Logic Power
23 22 21 20 fc - corner Os Offset Adjustment
D3 D2 D1 D0 frequency
0 0 0 0 fmax/16
0 0 0 1 fmax/8 Bottom View
0.80
0 0 1 1 fmax/4 0.70
0 1 1 1 fmax/2 Out Gnd Os4 In
1 1 1 1 fmax -Vs +Vs
Binary Tuning Equation:
fc = (fmax/16) [1+ D3 x 23 + D2 x 22 + D1 x 21 + D0 x 20] D0 D1 +5V D2 D3
0.10
where D1 - D3 = "0" or "1", and
fmax = Maximum tuning frequency 0.00
fc = Corner frequency;
1.80
0.50
0.80
0.30
0.90
1.00
0.00
1.50
1.10
1.30
1.60
Minimum tunable frequency = fmax/16 (D0 thru D3 = 0);
Minimum frequency step (Resolution) = fmax /16
Data Input Specifications
Discrete Frequencies
F D0 D1 D2 D3 Input Data Levels (+5Vdc CMOS Logic)
FB 0 0 0 0
F1 1 0 0 0 Input Voltage (Vs=15 Vdc)
F2 1 1 0 0 Low Level In 0 Vdc min. 0.5 Vdc max.
F3 1 1 1 0 High Level In 3.5 Vdc min. 5.0 Vdc max.
F4 1 1 1 1
Discrete Tuning Equation: Input Current
fc = FB + D0[Df0] + D1[Df1] + D2[Df2] + D3[Df3] High Level In -0.4mA typ. -2.0mA max.
Df0, Df1, Df2, Df3 are the incremental frequency shifts for the data Low Level In +0.4mA typ. +2.0mA max.
bits D0, D1, D2 and D3. They are selected to realize the five
customer specified programming frequencies FB fi F4. Other Input Capacitance 20 pF typ. 30 pF max.
programming codes produce valid fc's between FB and F4.
Input Data Format Frequency Select Bits
Positive Logic Logic "1" = (+5Vdc)
Logic "0" = Gnd
Bit Weight (Binary-Coded)
D0 LSB (least significant bit)
D3 MSB (most significant bit)
Frequency Range16:1 Binary Weighted
2
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
428 Series
8-Pole
4-Bit Programmable Low-Pass Filters
Model 428L4B 428L4E 428L4EX 428L4EY
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Butterworth Elliptic Elliptic Elliptic
Size 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5"
Range fc, fr 10.0 Hz to 102.4 kHz 10.0 Hz to 102.4 kHz 10.0 Hz to 102.4 kHz 10.0 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 -0.05 dB -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 @ 1 kHz
Wide Band Noise 200 mVrms typ. 200 mVrms typ. 250 mVrms typ. 250 mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 50 mVrms typ. 50 mVrms typ. 75 mVrms typ. 75 mVrms 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
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
428 Series
8-Pole
4-Bit Programmable Low-Pass Filters
Model 428L4L 428L4D60 428L4D80 428L4D10
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 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5"
Range fc 10.0 Hz to 102.4 kHz 10.0 Hz to 102.4 kHz 10.0 Hz to 102.4 kHz 10.0 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 @ 1 kHz
Wide Band Noise 200 mVrms typ. 200 mVrms typ. 200 mVrms typ. 200 mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 50 mVrms typ. 50 mVrms typ. 50 mVrms typ. 50 mVrms 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
428 Series
8-Pole
4-Bit Programmable High-Pass Filters
Model 428H4B 428H4E 428H4EX 428H4EY
Product Specifications
Transfer Function 8-Pole 8-Pole, 6 zero 8-Pole, 6 zero 8-Pole, 6 zero
Butterworth Elliptic Elliptic Elliptic
Size 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5" 0.8" x 1.8" x 0.5"
Range fc, fr 10.0 Hz to 102.4 kHz 10.0 Hz to 102.4 kHz 10.0 Hz to 102.4 kHz 10.0 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 -0.05 dB -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. 1.25 fr-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 @ 1 kHz
Wide Band Noise 400 mVrms typ. 400 mVrms typ. 500 mVrms typ. 500 mVrms typ.
(5 Hz - 2 MHz)
Narrow Band Noise 100 mVrms typ. 100 mVrms typ. 150 mVrms typ. 150 mVrms 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
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
428 Series
Specification Pin-Out and Package Data
(25°C and Vs ± 15 Vdc) Ordering Information
Analog Input Characteristics1 Pin-Out & Package Data
10 k W min.
0.30
Impedance (Side View)
428
Voltage Range ± 10 Vpeak 0.00
0.15 min.
Max. Safe Voltage ±Vs 0.025 Dia.
Analog Output Characteristics All dimensions are in inches
All case dimensions ±0.02"
Impedance (Closed Loop) 11 W typ.
Bottom View
10 W max. 0.80
0.70
Linear Operating Range ±10V Out Gnd Os4 In
2 -Vs +Vs
Maximum Current ±2 mA
3 D0 D1 +5V D2 D3
Offset Voltage 22 mV typ. 0.10
0.00
20 mV max.
1.80
0.50
0.80
0.30
0.90
1.00
0.00
1.50
1.10
1.30
50 mV/°C
1.60
Offset Temp. Coeff.
Power Supply (±V) Filter Mounting Assembly-See FMA-02A
Rated Voltage ±15 Vdc
Operating Range ±12 to ±18 Vdc Ordering Information
Filter Type 428 Transfer Function
Maximum Safe Voltage ±18 Vdc
L - Low Pass B - Butterworth
Quiescent Current ±25 mA typ. H - High Pass L - Bessel
±40 mA max. D60 - constant delay (-60 dB)
Temperature D80 - constant delay (-80 dB)
D10 - constant delay (-100 dB)
Operating -20 to +70°C E - elliptic 1.77 (-80 dB)
Storage -25 to +85°C 428 L4E-7 EX- elliptic 1.56 (-80dB)
EY - elliptic 2.00 (-100 dB)
Model Number
Notes:
Binary Tuning Ranges
1. Input and output signal voltage referenced to supply common.
Model Tuning *Minimum
2. Output is short circuit protected to common. Number Range (Hz) Step (Hz)
DO NOT CONNECT TO ±Vs. 1 10-160 10
2 25-400 25
3. Adjustable to zero.
3 50-800 50
4. Units operate with or without offset pin connected. 4 100-1.60k 100
5 250-4.00k 250
6 500-8.00k 500
7 1.00k-16.0k 1.00k
DC Offset Adjustment 8 2.50k-40.0k 2.50k
9 5.00k-80.0k 5.00k
+ Vs 10 6.40k-102.4k 6.40k
*Contact factory for custom step frequency. Maximum step 6.40 kHz.
Do not connect
if trim is not Discrete Frequency's
required. Customer must specify f1 ,f2 ,f3, f4,f5. Maximum span f1 fi f5 1,000:1.
Contact factory for custom frequency's
20 k W OS
(Cermet)
- Vs
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-00428-01
6
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
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
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
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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
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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
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de