D70 Series
100 Hz to 50 kHz DIP Filters
Fixed Frequency 8-, 6-, 4-Pole Filters
Description
The D70 Series of small, fixed-frequency, linear
active DIP filters provide high performance linear,
multi-pole filtering in a compact package, with a
broad range of pole configurations. These
Butterworth and Bessel low-pass and Butterworth
high-pass filters combine the excellent performance
of linear multi-pole filter design with the space sav-
ing of the dual in-line package (DIP). Each model
comes factory tuned to a user-specified corner fre-
quency between 100Hz and 50kHz. These fully
self-contained units require no external compo-
nents or adjustments. They operate with dynamic
input voltage range from non-critical ±5V to ±18V
power supplies.
Features/Benefits:
· Compact DIP design minimizes board space
requirements
· Plug-in ready-to-use, reducing engineering
design and manufacturing time
· Factory tuned, no external clocks or adjustments
needed
· Low harmonic distortion and wide signal-to-noise
ratio to 14 bit resolution Available Low-Pass Models: . . . . . . . . . . .Page
· Broad range of pole configurations and corner fre- D70L8B 8-pole Butterworth . . . . . . . . . . . . . . .2
quencies to meet a wide range of applications D70L6B 6-pole Butterworth . . . . . . . . . . . . . . .2
D70L4B 4-pole Butterworth . . . . . . . . . . . . . . .2
D70L8L 8-pole Bessel . . . . . . . . . . . . . . . . . . .3
Applications D70L6L 6-pole Bessel . . . . . . . . . . . . . . . . . . .3
· Anti-alias filtering D70L4L 4-pole Bessel . . . . . . . . . . . . . . . . . . .3
· Data acquisition systems
· Communication systems and electronics Available High-Pass Models:
· Medical electronics equipment and research D70H8B 8-pole Butterworth . . . . . . . . . . . . . . .4
· Aerospace, navigation and sonar applications D70H6B 6-pole Butterworth . . . . . . . . . . . . . . .4
· Sound and vibration testing D70H4B 4-pole Butterworth . . . . . . . . . . . . . . .4
· Real and compressed time data analysis
· Noise elimination General Specifications:
· Signal reconstruction Pin-out/package data & ordering information . . . .5
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
D70 Series
8-, 6-, 4-Pole
Fixed Frequency Low-Pass Filters
Model D70L8B D70L6B D70L4B
Product Specifications
Transfer Function 8-Pole, Butterworth 6-Pole, Butterworth 4-Pole, Butterworth,
Size 0.84" x 0.65" x 0.31" 0.84" x 0.65" x 0.31" 0.65" x 0.51" x 0.31"
Range fc 100 Hz to 50 kHz 100 Hz to 50 kHz 100 Hz to 50 kHz
Theoretical Transfer Appendix A Appendix A Appendix A
Characteristics Page 9 Page 8 Page 7
Passband Ripple 0.0 dB 0.0 dB 0.0 dB
(theoretical)
DC Voltage Gain 0 ± 0.02 dB typ. 0 ± 0.02 dB typ. 0 ± 0.02 dB typ.
(non-inverting)
Stopband
Attenuation Rate 48 dB/octave 36 dB/octave 24 dB/octave
Cutoff Frequency fc ± 2% max. fc ± 2% max. fc ± 2% max.
Stability ± 0.02% /°C ± 0.02% /°C ± 0.02% /°C
Amplitude -3 dB -3 dB -3 dB
Phase -360° -270° -180°
Filter Attenuation 0.12 dB 0.80 fc 0.29 dB 0.80 fc 0.67 dB 0.80 fc
(theoretical) 3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc
60.0 dB 2.37 fc 60.0 dB 3.16 fc 60.0 dB 5.62 fc
80.0 dB 3.16 fc 80.0 dB 4.64 fc 80.0 dB 10.0 fc
Phase Match1
Amplitude Accuracy1
(theoretical)
Total Harmonic
Distortion @ 1 kHz < -90 dB < -90 dB < -90 dB
Wide Band Noise 200 mVrms typ. 200 mVrms typ. 200 mVrms typ.
(20 Hz - 4 MHz)
Narrow Band Noise 50 mVrms typ. 50 mVrms typ. 50 mVrms typ.
(5 Hz - 50 kHz)
Filter Mounting
Assembly FMA-01A FMA-01A FMA-01A
1. Phase Match and Amplitude Accuracy are within ±2% max., ±1% typ. of the theoretical transfer characteristics.
2
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
D70 Series
8-, 6-, 4-Pole
Fixed Frequency Low-Pass Filters
Model D70L8L D70L6L D70L4L
Product Specifications
Transfer Function 8-Pole, Bessel 6-Pole, Bessel 4-Pole, Bessel
Size 0.84" x 0.65" x 0.31" 0.84" x 0.65" x 0.31" 0.65" x 0.51" x 0.31"
Range fc 100 Hz to 50 kHz 100 Hz to 50 kHz 100 Hz to 50 kHz
Theoretical Transfer Appendix A Appendix A Appendix A
Characteristics Page 4 Page 3 Page 2
Passband Ripple 0.0 dB 0.0 dB 0.0 dB
(theoretical)
DC Voltage Gain 0 ± 0.02 dB typ. 0 ± 0.02 dB typ. 0 ± 0.02 dB typ.
(non-inverting)
Stopband
Attenuation Rate 48 dB/octave 36 dB/octave 24 dB/octave
Cutoff Frequency fc ± 2% max. fc ± 2% max. fc ± 2% max.
Stability ± 0.02% /°C ± 0.02% /°C ± 0.02% /°C
Amplitude -3 dB -3 dB -3 dB
Phase -182° -155° -121°
Filter Attenuation 1.91 dB 0.80 fc 1.89 dB 0.80 fc 1.86 dB 0.80 fc
(theoretical) 3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc
60.0 dB 4.52 fc 60.0 dB 5.41 fc 60.0 dB 8.48 fc
80.0 dB 6.07 fc 80.0 dB 7.99 fc 80.0 dB 15.12 fc
Phase Match1
Amplitude Accuracy1
(theoretical)
Total Harmonic
Distortion @ 1 kHz < -90 dB < -90 dB < -90 dB
Wide Band Noise 200 mVrms typ. 200 mVrms typ. 200 mVrms typ.
Narrow Band Noise 50 mVrms typ. 50 mVrms typ. 50 mVrms typ.
Filter Mounting
Assembly FMA-01A FMA-01A FMA-01A
1. Phase Match and Amplitude Accuracy are within ±2% max., ±1% typ. of the theoretical transfer characteristics.
3
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
D70 Series
8-, 6-, 4-Pole
Fixed Frequency High-Pass Filters
Model D70H8B D70H6B D70H4B
Product Specifications
Transfer Function 8-Pole, Butterworth 6-Pole, Butterworth 4-Pole, Butterworth
Size 0.84" x 0.65" x 0.31" 0.84" x 0.65" x 0.31" 0.65" x 0.51" x 0.31"
Range fc 100 Hz to 50 kHz 100 Hz to 50 kHz 100 Hz to 50 kHz
Theoretical Transfer Appendix A Appendix A Appendix A
Characteristics Page 29 Page 28 Page 27
Passband Ripple 0.0 dB 0.0 dB 0.0 dB
(theoretical)
Voltage Gain 0 ± 0.02 dB typ. 0 ± 0.02 dB typ. 0 ± 0.02 dB typ.
(non-inverting)
Power Bandwidth 120 kHz 120 kHz 120 kHz
Small Signal Bandwidth (-6dB) 1 MHz (-6dB) 1 MHz (-6dB) 1 MHz
Stopband
Attenuation Rate 48 dB/octave 36 dB/octave 24 dB/octave
Cutoff Frequency fc ± 2% max. fc ± 2% max. fc ± 2% max.
Stability ± 0.02% /°C ± 0.02% /°C ± 0.02% /°C
Amplitude -3 dB -3 dB -3 dB
Phase -360° -270° -180°
Filter Attenuation 80 dB 0.31 fc 80 dB 0.21 fc 80 dB 0.10 fc
(theoretical) 60 dB 0.42 fc 60 dB 0.32 fc 60 dB 0.18 fc
3.01 dB 1.00 fc 3.01 dB 1.00 fc 3.01 dB 1.00 fc
00.0 dB 2.00 fc 00.0 dB 2.50 fc 00.0 dB 4.0 fc
Phase Match1
Amplitude Accuracy1
(theoretical)
Total Harmonic
Distortion @ 1 kHz < -80 dB < -80 dB < -80 dB
Wide Band Noise 400 mVrms typ. 400 mVrms typ. 400 mVrms typ.
(20 Hz - 4 MHz)
Narrow Band Noise 100 mVrms typ. 100 mVrms typ. 100 mVrms typ.
(20 Hz - 100 kHz)
Filter Mounting
Assembly FMA-01A FMA-01A FMA-01A
1. Phase Match and Amplitude Accuracy are within ±2% max., ±1% typ. of the theoretical transfer characteristics.
4
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
D70 Series
Specification Pin-Out and Package Data
(25°C and Vs ± 15 Vdc) Ordering Information
Analog Input Characteristics1
Impedance 10 kW min.
Voltage Range ± 10 Vpeak
Max. Safe Voltage ± Vs
Analog Output Characteristics
Impedance 1W
Linear Operating Range ± 10 V
Maximum Current2 ± 10 mA
Offset Voltage3 ± 10 mV
Offset Temp. Coeff. 50 mV /°C
Power Supply (±Vs)
Rated Voltage ± 15 Vdc
Operating Range ± 5 to ± 18 Vdc
Maximum Safe Voltage ± 18 Vdc
Quiescent Current (max.)
8 Pole ± 18 mA
6 Pole ± 15 mA
4 Pole ± 10 mA
Temperature
Operating 0 to + 70°C
Storage - 25 to + 85°C
Notes:
1. Input and output signal voltage referenced to supply Recommend PC board hole 0.025"
common.
Filter Mounting Assembly-See FMA-01A
2. Output is short circuit protected to common.
DO NOT CONNECT TO ±VS.
3. Adjustable to zero.
Ordering Information
Filter Type Transfer Function
L - Low Pass B - Butterworth
Optional Offset Adjustment H - High Pass L - Bessel
D70L8B-849 Hz
No. of Poles -3 dB Corner Frequency
4
8 e.g., 849 Hz
6 2.50 kHz
4 33.3 kHz
4. How to specify Corner Frequencies:
Corner frequencies are specified by attaching a three digit frequency designa-
tor to the basic model number. Corner frequencies can range from 100 Hz to
50.0 kHz.
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-00D70-01
5
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
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
6-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 .430
Amp (dB)
0.10 -0.029 -15.5 .430 -40
0.20 -0.116 -31.0 .430
0.30 -0.261 -46.5 .430 -60
0.40 -0.465 -62.0 .430
0.50 -0.728 -77.4 .430
-80
0.60 -1.05 -92.9 .430
0.70 -1.44 -108 .430 -100
0.80 -1.89 -124 .430 2 3 4 56781.0 2 3 4 567 10.0
0.85 -2.15 -132 .430 0.1
0.90 -2.42 -139 .430 Normalized Frequency(f/fc)
0.95 -2.70 -147 .430
1.00 -3.01 -155 .430
1.10 -3.68 -170 .429 Delay (Normalized)
1.20 -4.44 -186 .428 1.0
1.30 -5.29 -201 .426
1.40 -6.23 -216 .422
Delay (sec)
1.50 -7.29 -232 .416
1.60 -8.46 -246 .401
1.70 -9.74 -261 .393 0.5
1.80 -11.1 -275 .376
1.90 -12.6 -287 .357
2.00 -14.2 -300 .335
2.25 -18.3 -328 .279
2.50 -22.6 -351 .228 0.0
2.75 -26.7 -369 187 0.1 0.15 2 3 4 5 6 7 89 1.0 1.5
3.00 -30.7 -385 .156 Normalized Time (1/f sec)
3.25 -34.5 -398 .131
3.50 -38.1 -408 .111
4.00 -44.7 -426 .083
5.00 -55.9 -449 .052 Step Response
1.2
Step Response (V/V)
6.00 -65.2 -465 .036
7.00 -73.2 -476 .026 1.0
8.00 -80.1 -484 .020
9.00 -86.2 -490 .015 0.8
10.0 -91.6 -495 .013 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
3
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
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
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Low-Pass
6-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 .615
Amp (dB)
0.10 0.00 -22.2 .617 -40
0.20 0.00 -44.5 .624
0.30 0.00 -67.2 .637 -60
0.40 0.00 -90.4 .656
0.50 -0.001 -115 .685
-80
0.60 -0.009 -140 .731
0.70 -0.060 -167 .803 -100
0.80 -0.289 -198 .911 2 3 4 5 6 78
0.85 -0.578 -215 .970 0.1 1.0 2 3 4 5 6 7 10.0
0.90 -1.080 -233 1.02 Normalized Frequency(f/fc)
0.95 -1.88 -252 1.03
1.00 -3.01 -270 1.00
1.10 -6.17 -304 .845 Delay (Normalized)
1.20 -9.96 -331 .660
1.30 -13.9 -352 .518 2.0
1.40 -17.6 -368 .417
Delay (sec)
1.50 -21.2 -382 .345
1.60 -24.5 -393 .291
1.70 -27.7 -403 .251
1.80 -30.6 -412 .219 1.0
1.90 -33.5 -419 .193
2.00 -36.1 -425 .171
2.25 -42.3 -439 .132
2.50 -47.8 -450 .105
2.75 -52.7 -458 .086 0.0
0.15 2 3 4 5 6 7 89 1.5
0.1 1.0
3.00 -57.3 -465 .071 Normalized Time (1/f sec)
3.25 -61.4 -471 .060
3.50 -65.3 -476 .052
4.00 -72.2 -484 .039
5.00 -83.9 -496 .025 Step Response
Step Response (V/V)
6.00 -93.4 -503 .017 1.2
7.00 -101 -508 .012
8.00 -108 -512 .0097 1.0
9.00 -115 -515 .0076 0.8
10.0 -120 -518 .0062
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
8
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
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
6-Pole
Appendix A Butterworth
Theoretical Transfer Characteristics Frequency Response
1 0
f/fc Amp Phase Delay
(Hz) (dB) (deg) (sec)
-20
0.10 -120 518 0.617
Amp (dB)
0.20 -83.9 496 0.624 -40
0.30 -62.7 473 0.637
0.40 -47.8 450 0.656 -60
0.50 -36.1 425 0.685
0.60 -26.6 400 0.731 -80
0.70 -18.6 373 0.803
0.80 -11.9 342 0.911 -100
0.85 -9.05 325 0.970 2 3 4 5 6 78
0.90 -6.57 307 1.017 0.1 1.0 2 3 4 5 6 7 10.0
Normalized Frequency(f/fc)
0.95 -4.55 288 1.033
1.00 -3.01 270 1.005
1.20 -0.46 209 0.660
1.40 -0.08 172 0.417
1.60 -0.02 147 0.291
1.80 -0.00 128 0.219
2.00 -0.00 115 0.171
2.50 -0.00 90.4 0.105
3.00 -0.00 74.8 0.071
4.00 0.00 55.8 0.039
5.00 0.00 44.5 0.025
6.00 0.00 37.0 0.017
7.00 0.00 31.7 0.013
8.00 0.00 27.7 0.010
9.00 0.00 24.6 0.008
10.0 0.00 22.2 0.006
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
28
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