High-Pass

4-Pole

Appendix A

Butterworth

27

1784 Chessie Lane, Ottawa, IL 61350 • Tel: 800/252-7074, 815/434-7800 • FAX: 815/434-8176

e-mail: sales@freqdev.com Web Address: http://www.freqdev.com

(sec)

Normalized Frequency(f/fc)

Theoretical Transfer Characteristics

1

Frequency Response

0.1

1.0

10.0

2

3 4 5 6 78

2

3 4 5 6 7

-100

-80

-60

-40

-20

0

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.85

0.90

0.95

1.00

1.20

1.40

1.60

1.80

2.00

2.50

3.00

4.00

5.00

6.00

7.00

8.00

9.00

10.0

0.00

0.00

0.00

0.00

0.00

0.00

-0.039

-0.017

-0.003

-0.001

0.00

-3.99

-3.01

-0.908

-0.285

-0.100

-17.8

-12.6

-8.43

-6.69

-5.22

-80.0

-55.9

-41.8

-31.8

-24.1

345

330

314

299

282

264

245

224

213

202

191

180

143

118

100

87.6

78.0

61.4

50.7

37.8

30.1

25.1

21.4

18.8

16.7

15.0

.017

.012

.009

.007

.005

.004

.152

.119

.072

.049

.027

.612

.588

.427

.289

.204

.511

.558

.604

.619

.622

.418

.423

.433

.449

.474

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).

Actual Delay =

Normalized Delay

Actual Corner Frequency (fc) in Hz

f/fc

(Hz)

Amp

(dB)

Phase

(deg)

Delay