854 Series
0.1 Hz to 102.4 kHz 2" x 4"
8-Bit Programmable 4-Pole Filters
Description
The 854 Series are digitally programmable low-pass
and high-pass active filters that are tunable over a
256:1 frequency range. 854 filters are available with
any one of six standard factory-set tuning ranges up
to 102.4 kHz. These units contain 8 CMOS logic
inputs that can be operated in a transparent or
latching mode.
All 854 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. 854 filters operate
from non-critical ±12 to ±18 Vdc power supplies,
have a 10 k (min.) input impedance, a 10 (max.)
output impedance and offer dc voltage offset
adjustment.
Features/Benefits:
· 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.
· Factory-set tuning range, no external clocks or
adjustments needed. Programmable Specifications . . . . . . . . . . . . . Page
Digital Tuning & Control . . . . . . . . . . . . . . . . . . . . . . 2
· Broad range of transfer characteristics and corner
frequencies to meet a wide range of applications. Available Low-Pass Models: . . . . . . . . . . . . . . . . . . .
· Low profile design, ideal for rack mount 854L4B 4-pole Butterworth . . . . . . . . . . . . . . . . . . 3
installations. 854L4L 4-pole Bessel . . . . . . . . . . . . . . . . . . . . . . 3
854L8Y2 4-pole Cheby (0.2 dB Ripple) . . . . . . . . . . 3
Applications 854L8Y5 4-pole Cheby (0.5 dB Ripple) . . . . . . . . . . 3
· Anti-alias filtering
Available High-Pass Models: . . . . . . . . . . . . . . . . . .
· Data acquisition systems 854H8B 4-pole Butterworth . . . . . . . . . . . . . . . . . . 4
· Communication systems and electronics 854H8Y2 4-pole Cheby (0.2 dB Ripple) . . . . . . . . . . 4
854H8Y5 4-pole Cheby (0.5 dB Ripple) . . . . . . . . . . 4
· Medical electronics equipment and research
· Aerospace, navigation and sonar applications General Specifications:
· Sound and vibration testing Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin-out/package data. . . . . . . . . . . . . . . . . . . . . . . . . 5
· Real and compressed time data analysis
· Noise elimination
· Signal reconstruction
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
854 Series
Digital Tuning &
8-Bit Programmable Filters Control Characteristics
Digital Tuning Characteristics Pin-Out Key
The digital tuning interface circuits are two 4042 quad CMOS IN Analog Input Signal D7 Tuning Bit 7 (MSB)
latches which accept the following CMOS-compatible inputs: OUT Analog Output Signal D6 Tuning Bit 6
eight tuning bits (D0 - D7), a latch strobe bit (C), and a transition GND Power and Signal Return D5 Tuning Bit 5
polarity bit (P). "P" Transition Polarity Bit D4 Tuning Bit 4
"C" Tuning Strobe Bit D3 Tuning Bit 3
Filter tuning follows the tuning equation given below:
+Vs Supply Voltage, Positive D2 Tuning Bit 2
fc = ( fmax/256 ) [ 1 + D7 x 27 + D6 x 26 + D5 x 25 + D4 x 24 + D3 -Vs Supply Voltage, Negative D1 Tuning Bit 1
x 23 + D2 x 22 + D1 x 21 + D0 x 20 ] Os Optional Offset Adjustment 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
Data Control Specifications GND
D3
Data Control Lines D2
Functions Latch Strobe (C) D1
Transition Polarity (P) D0
Data Control Modes
IN Os P C
Mode 1 P = 0; C = 0 frequency follows input codes Bottom View
P = 0; C = 0> frequency latched on rising edge
Mode 2 P = 1; C = 1 frequency follows input codes
MSB --- --- --- --- --- --- LSB Bit
P = 1; C = 1fl frequency latched on falling edge Weight
Input Data Levels (CMOS Logic) 27 26 25 24 23 22 21 20 fc
Corner
Input Voltage (Vs = 15 Vdc) D7 D6 D5 D4 D3 D2 D1 D0 Frequency
Low Level In 0 Vdc min. 4 Vdc max.
High Level In 11 Vdc min. 15 Vdc max. 0 0 0 0 0 0 0 0 fmax/256
Input Current
High Level In - 10 -5 mA typ. -1 mA max. 0 0 0 0 0 0 0 1 fmax/128
Low Level In +10 -5 mA typ. +1 mA max.
0 0 0 0 0 0 1 1 fmax/64
Input Capacitance 5 pF typ 7.5 pF max.
0 0 0 0 0 1 1 1 fmax/32
Latch Response
1
Data Set Up Time 25 nS 0 0 0 0 1 1 1 1 fmax/16
2
Data Hold Time 50 nS
Strobe Pulse Width 80 nS min. 0 0 0 1 1 1 1 1 fmax/8
Input Data Format Frequency Select Bits
0 0 1 1 1 1 1 1 fmax/4
Positive Logic Logic "1" = +Vs
Logic "0" = Gnd 0 1 1 1 1 1 1 1 fmax/2
Bit Weighting (Binary-Coded)
1 1 1 1 1 1 1 1 fmax
D0 LSB (least significant bit)
D7 MSB (most significant bit) Notes:
1. Frequency data must be present before occurrence of strobe edge.
Frequency Range 256 : 1, Binary Weighted 2. Frequency data must be present after occurrence of strobe edge.
2
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
854 Series
4-Pole
8-Bit Programmable Low-Pass Filters
Model 854L8B 854L8L 854L8Y2 854L8Y5
Product Specifications
Transfer Function 4-Pole, 4-Pole, 4-Pole, Chebychev, 4-Pole, Chebychev,
Butterworth Bessel 0.2 dB Ripple 0.5 dB Ripple
Size, Model 1 & 2 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6"
Model 3 thru 6 4.0" x 2.0" x 0.4" 4.0" x 2.0" x 0.4" 4.0" x 2.0" x 0.4" 4.0" x 2.0" x 0.4"
Range fc 0.1 Hz to 102.4 kHz 0.1 Hz to 102.4 kHz 0.1 Hz to 102.4 kHz 0.1 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A Appendix A
Characteristics Page 7 Page 2 Page 12 Page 15
Passband Ripple 0.0 dB 0.0 dB 0.20 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 24 dB/octave 24 dB/octave 24 dB/octave 24 dB/octave
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 -180° -121° -231° -245°
Filter Attenuation 0.67 dB 0.80 fc 1.86 dB 0.80 fc -0.20 dB 0.80 fc -0.43 dB 0.80 fc
(theoretical) 3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc
30.0 dB 2.37 fc 30.0 dB 3.50 fc 30.0 dB 1.89 fc 30.0 dB 1.80 fc
40.0 dB 3.16 fc 40.0 dB 4.72 fc 40.0 dB 2.46 fc 40.0 dB 2.33 fc
Phase Match1 0 - 0.8 fc ± 2° max. 0 - fc ± 2° max. 0 - 0.8 fc ± 2° max. 0 - 0.8 fc ± 2° max.
± 1° typ. ± 1° typ. ± 1° typ. ± 1° typ.
0.8 fc - 1.0 fc ± 3° max. 0.8 fc - 1.0 fc ± 3° max. 0.8 fc - 1.0 fc ± 3° max.
± 1.5° typ. ± 1.5° typ. ± 1.5° typ.
Amplitude Accuracy 0 - 0.8 fc ± 0.2 dB max. 0 - 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. < - 88 dB typ. < - 88 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-03A FMA-03A FMA-03A FMA-03A
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
854 Series
4-Pole
8-Bit Programmable High-Pass Filters
Model 854H8B 854H8Y2 854H8Y5
Product Specifications
Transfer Function 4-Pole, 4-Pole, Chebychev, 4-Pole, Chebychev,
Butterworth 0.2 dB Ripple 0.5 dB Ripple
Size, Model 1 & 2 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6" 4.0" x 2.0" x 0.6"
Model 3 thru 6 4.0" x 2.0" x 0.4" 4.0" x 2.0" x 0.4" 4.0" x 2.0" x 0.4"
Range fc 0.1 Hz to 102.4 kHz 0.1 Hz to 102.4 kHz 0.1 Hz to 102.4 kHz
Theoretical Transfer Appendix A Appendix A Appendix A
Characteristics Page 27 Page 31 Page 33
Passband Ripple 0.0 dB 0.20 dB 0.50 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
(non-inverting) 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
Small Signal Bandwidth (-6 dB) 1 MHz (-6 dB) 1 MHz (-6 dB) 1 MHz
Stopband
Attenuation Rate 24 dB/octave 24 dB/octave 24 dB/octave
Cutoff Frequency fc ± 2% max. fc ± 2% max. fc ± 2% max.
Stability ± 0.01% /°C ± 0.01% /°C ± 0.01% /°C
Amplitude -3 dB -3 dB -3 dB
Phase -180° -231° -245°
Filter Attenuation 40 dB 0.31 fc 40.0 dB 0.41 fc 40.0 dB 0.43 fc
(theoretical) 30 dB 0.42 fc 30.0 dB 0.53 fc 30.0 dB 0.56 fc
3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc
0.02 dB 2.00 fc -0.07 dB 2.00 fc -0.25 dB 2.00 fc
Phase Match1 fc - 100 kHz ± 3° max. fc - 100 kHz ± 3° max. fc - 100 kHz ± 3° max.
± 1.5° typ. ± 1.5° typ. ± 1.5° typ.
Amplitude Accuracy 1.00 - 1.25 fc ± 0.3 dB max. 1.00 - 1.25 fc ± 0.3 dB max. 1.00 - 1.25 fc ± 0.3 dB max.
(theoretical) ± 0.15 dB typ. ± 0.15 dB typ. ± 0.15 dB typ.
1.25 fc-100 kHz± 0.2 dB max. 1.25 fc-100 kHz ± 0.2 dB max. 1.25 fc-100 kHz± 0.2 dB max.
± 0.1 dB typ. ± 0.1 dB typ. ± 0.1 dB typ.
Total Harmonic < - 100 dB typ. < - 88 dB typ. < - 88 dB typ.
Distortion @ 1 kHz
Wide Band Noise 400 mVrms typ. 400 mVrms typ. 400 mVrms typ.
Narrow Band Noise 100 mVrms typ. 100 mVrms typ. 100 mVrms typ.
(5 Hz - 100 kHz)
Filter Mounting
Assembly FMA-03A FMA-03A FMA-03A
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
854 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 W min.
4.00
Voltage Range ± 10 Vpeak
Max. Safe Voltage ±Vs M-2
0.6
Analog Output Characteristics 0.4 M-1
Impedance (Closed Loop) 11 W typ.
0.2 min
10 W max. Side View
Linear Operating Range ±10V 0.04 Dia.
Maximum Current2 ±2 mA
Offset Voltage3 22 mV typ.
20 mV max. OUT +Vs -Vs
Offset Temp. Coeff. 50 mV/°C
D7
Power Supply (±V) D6
Rated Voltage ±15 Vdc D5
Operating Range ±12 to ±18 Vdc D4
Maximum Safe Voltage ±18 Vdc 2.00 GND
Quiescent Current D3
D2
4-Pole ±13 mA typ.
D1
±20 mA max.
D0
Temperature
Operating -20 to +70°C 4
IN Os P C
Bottom View
Storage -25 to +85°C
Filter Mounting Assembly-See FMA-03A
Notes:
1. Input and output signal voltage referenced to supply common.
2. Output is short circuit protected to common.
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
Y2 - Chebychev (0.2 dB Ripple)
Do not connect 854L8B-3 Y5 - Chebychev (0.2 dB Ripple)
if trim is not
required.
Model Number
20 k W
(Cermet) OS e.g., Model Tuning Minimum
Number Range (Hz) Step(Hz) Case
1 0.1 to 25.6 0.1 M-2
2 1.0 to 256 1.0 M-2
3 10 to 2560 10 M-1
4 100 to 25.6k 100 M-1
- Vs
5 200 to 51.2k 200 M-1
6 400 to 102.4k 400 M-1
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-00854-01
5
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
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
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Low-Pass
4-Pole
Appendix A Bessel
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .336
Amp (dB)
0.10 -0.028 -12.1 .336 -40
0.20 -0.111 -24.2 .336
0.30 -0.251 -36.3 .336 -60
0.40 -0.448 -48.4 .336
0.50 -0.705 -60.6 .336
-80
0.60 -1.02 -72.7 .336
0.70 -1.41 -84.8 .336 -100
0.80 -1.86 -96.8 .335 2 3 4 5 6 78
0.85 -2.11 -103 .334 0.1 1.0 2 3 4 5 6 7 10.0
0.90 -2.40 -109 .333 Normalized Frequency(f/fc)
0.95 -2.69 -115 .332
1.00 -3.01 -121 .330
1.10 -3.71 -133 .325 Delay (Normalized)
1.20 -4.51 -144 .318 1.0
1.30 -5.39 -156 .308
1.40 -6.37 -166 .295
Delay (sec)
1.50 -7.42 -177 .280
1.60 -8.54 -187 .263
1.70 -9.71 -195 .246 0.5
1.80 -10.9 -204 .228
1.90 -12.2 -212 .211
2.00 -13.4 -219 .194
2.25 -16.5 -235 .158
2.50 -19.5 -248 .129 0.0
2.75 -22.4 -259 .107 0.1 0.15 2 3 4 5 6 7 89
1.0 1.5
3.00 -25.1 -267 .089 Normalized Time (1/f sec)
3.25 -27.6 -275 .076
3.50 -30.0 -281 .065
4.00 -34.4 -291 .049
5.00 -41.9 -305 .031 Step Response
1.2
Step Response (V/V)
6.00 -48.1 -315 .021
7.00 -53.4 -321 .016 1.0
8.00 -58.0 -326 .012
9.00 -62.0 -330 .009 0.8
10.0 -65.7 -333 .008 0.6
0.4
0.2
-0.0
1.Normalized Group Delay:
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
2
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Low-Pass
4-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 .416
Amp (dB)
0.10 0.00 -15.0 .418 -40
0.20 0.00 -30.1 .423
0.30 -0.00 -45.5 .433 -60
0.40 -0.003 -61.4 .449
0.50 -0.017 -78.0 .474
-80
0.60 -0.072 -95.7 .511
0.70 -0.243 -115 .558 -100
0.80 -0.674 -136 .604 2 3 4 5 6 78
0.85 -1.047 -147 .619 0.1 1.0 2 3 4 5 6 7 10.0
0.90 -1.555 -158 .622 Normalized Frequency(f/fc)
0.95 -2.21 -169 .612
1.00 -3.01 -180 .588
1.10 -4.97 -200 .513 Delay (Normalized)
1.20 -7.24 -217 .427 2.0
1.30 -9.62 -231 .350
1.40 -12.0 -242 .289
Delay (sec)
1.50 -14.3 -252 .241
1.60 -16.4 -260 .204
1.70 -18.5 -266 .175 1.0
1.80 -20.5 -272 .152
1.90 -22.3 -277 .134
2.00 -24.1 -282 .119
2.25 -28.2 -291 .091
2.50 -31.8 -299 .072 0.0
2.75 -35.1 -304 .059 0.1 0.15 2 3 4 5 6 7 89
1.0 1.5
3.00 -38.2 -309 .049 Normalized Frequency(f/fc)
3.25 -41.0 -313 .041
3.50 -43.5 -317 .035
4.00 -48.2 -322 .027
5.00 -55.9 -330 .017 Step Response
Step Response (V/V)
6.00 -62.3 -335 .012 1.2
7.00 -67.6 -339 .009
8.00 -72.2 -341 .007 1.0
9.00 -76.3 -343 .005 0.8
10.0 -80.0 -345 .004
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
7
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Low-Pass
4-Pole, 0.2 dB Ripple
Appendix A Chebychev
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.000 0.00 .478
Amp (dB)
0.10 0.039 -17.3 .487 -40
0.20 0.129 -35.2 .509
0.30 0.195 -54.0 .533
0.40 0.174 -73.4 .547 -60
0.50 0.074 -93.2 .553
-80
0.60 0.000 -113 .575
0.70 0.074 -135 .654 -100
0.80 0.199 -162 .836 2 3 4 5 6 78
0.85 0.063 -178 .947 0.1 1.0 2 3 4 5 6 7 810.0
0.90 -0.443 -196 1.02 Normalized Frequency(f/fc)
0.95 -1.47 -214 .989
1.00 -3.01 -231 .873
1.10 -6.89 -257 .583 Delay (Normalized)
1.20 -10.8 -274 .385 2.0
1.30 -14.5 -286 .271
1.40 -17.7 -294 .202
Delay (sec)
1.50 -20.7 -300 .158
1.60 -23.4 -306 .128
1.70 -25.8 -310 .107 1.0
1.80 -28.1 -313 .090
1.90 -30.2 -316 .078
2.00 -32.2 -319 .068
2.25 -36.7 -324 .051
2.50 -40.6 -328 .039 0.0
2.75 -44.1 -331 .032 0.15 2 3 4 5 6 7 89
0.1 1.0 1.5
3.00 -47.3 -334 .026 Normalized Time (1/f sec)
3.25 -50.2 -336 .022
3.50 -52.8 -338 .018
4.00 -57.6 -341 .014
5.00 -65.5 -345 .009 Step Response
Step Response (V/V)
6.00 -71.9 -347 .006 1.2
7.00 -77.3 -349 .004
8.00 -82.0 -351 .003 1.0
9.00 -86.1 -352 .003 0.8
10.0 -89.8 -352 .002
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
12
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Low-Pass
4-Pole, 0.5 dB Ripple
Appendix A Chebychev
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.00 0.00 0.00 .476
Amp (dB)
0.10 0.087 -17.3 .492 -40
0.20 0.295 -35.7 .533
0.30 0.474 -55.7 .577
0.40 0.463 -76.9 .596 -60
0.50 0.248 -98.2 .583
-80
0.60 0.025 -119 .578
0.70 0.072 -141 .647 -100
0.80 0.432 -168 .881 2 3 4 5 6 78 2 3 4 5 6 78
0.85 0.482 -185 1.06 0.1 1.0 10.0
0.90 0.062 -205 1.18 Normalized Frequency(f/fc)
0.95 -1.12 -226 1.13
1.00 -3.01 -245 .946
1.10 -7.61 -272 .559 Delay (Normalized)
1.20 -12.0 -288 .345 2.0
1.30 -15.9 -298 .235
1.40 -19.3 -305 .173
Delay (sec)
1.50 -22.4 -311 .134
1.60 -25.1 -315 .108
1.70 -27.6 -318 .089 1.0
1.80 -29.9 -321 .075
1.90 -32.1 -324 .065
2.00 -34.1 -326 .057
2.25 -38.6 -301 .042
2.50 -42.6 -334 .033 0.0
2.75 -46.1 -336 .026 0.15 2 3 4 5 6 7 89
0.1 1.0 1.5
3.00 -49.3 -339 .021 Normalized Time (1/f sec)
3.25 -52.2 -340 .018
3.50 -54.9 -342 .015
4.00 -59.7 -344 .011
5.00 -67.6 -347 .007 Step Response
Step Response (V/V)
6.00 -74.0 -350 .005 1.2
7.00 -79.4 -351 .004
8.00 -84.1 -352 .003 1.0
9.00 -88.2 -353 .002 0.8
10.0 -91.9 -354 .002
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
15
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
4-Pole
Appendix A Butterworth
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -80.0 345 .418
Amp (dB)
0.20 -55.9 330 .423 -40
0.30 -41.8 314 .433
0.40 -31.8 299 .449 -60
0.50 -24.1 282 .474
0.60 -17.8 264 .511 -80
0.70 -12.6 245 .558
0.80 -8.43 224 .604 -100
0.85 -6.69 213 .619 2 3 4 5 6 78
0.90 -5.22 202 .622 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.95 -3.99 191 .612
1.00 -3.01 180 .588
1.20 -0.908 143 .427
1.40 -0.285 118 .289
1.60 -0.100 100 .204
1.80 -0.039 87.6 .152
2.00 -0.017 78.0 .119
2.50 -0.003 61.4 .072
3.00 -0.001 50.7 .049
4.00 0.00 37.8 .027
5.00 0.00 30.1 .017
6.00 0.00 25.1 .012
7.00 0.00 21.4 .009
8.00 0.00 18.8 .007
9.00 0.00 16.7 .005
10.0 0.00 15.0 .004
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
27
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
4-Pole, 0.2 dB Ripple
Appendix A Chebychev
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -89.8 352 .212
Amp (dB)
0.20 -65.1 345 .218 -40
0.30 -51.1 337 .228
0.40 -40.6 328 .245
0.50 -32.2 319 .272 -60
0.60 -25.0 308 .314 -80
0.70 -18.6 296 .383
0.80 -12.7 280 .500 -100
0.90 -7.34 259 .686 2 3 4 5 6 78
1.00 -3.01 231 .873 0.1 1.0 2 3 4 5 6 7 8 10.0
Normalized Frequency(f/fc)
1.20 .140 172 .633
1.50 .031 128 .275
1.70 .003 111 .197
2.00 .074 93.2 .138
2.50 .174 73.4 .088
3.00 .200 60.4 .060
4.00 .170 44.5 .033
5.00 .129 35.2 .020
6.00 .098 29.2 .014
7.00 .076 24.9 .010
8.00 .060 21.7 .008
9.00 .048 19.3 .006
10.0 .040 17.3 .005
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
31
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
4-Pole, 0.5 dB Ripple
Appendix A Chebychev
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -91.9 354 .174
Amp (dB)
0.20 -67.6 347 .179 -40
0.30 -53.1 341 .188
0.40 -42.6 334 .203
0.50 -34.1 326 .226 -60
0.60 -26.8 317 .263 -80
0.70 -20.2 307 .326
0.80 -14.0 293 .440 -100
0.90 -8.13 274 .651 2 3 4 5 6 78 2 3 4 5 6 78
1.00 -3.01 245 .946 0.1 1.0 10.0
Normalized Frequency(f/fc)
1.20 .500 179 .693
1.50 .014 133 .271
1.70 .043 117 .199
2.00 .249 98.2 .146
2.50 .469 76.9 .095
3.00 .498 62.7 .065
4.00 .401 45.5 .035
5.00 .296 35.7 .021
6.00 .221 29.4 .014
7.00 .169 25.0 .010
8.00 .133 21.8 .008
9.00 .107 19.3 .006
10.0 .088 17.3 .005
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
33
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de