REV. B

OP1177/OP2177/OP4177

–16–

4

6

5

1/2 OP2177

8

V+

V

V1

50mV

1

4

2

3

8

V+

V

10k

100

7

1/2 OP2177

+

–

Figure 18. Channel Separation Test Circuit

7

4

6

5

1/2 OP2177

8

V+

V

R2

10k

R1

20k

V1

1

4

2

3

1/2 OP2177

8

V+

V

R3

33k

R4

33k

C4

330pF

C3

680pF

C2

10nF

C1

10nF

+

–

Figure 17. Two-Stage Band-Pass Filter

SPICE Model

The spice macro-model for the OP1177 can be downloaded from

the Analog Devices web site at www.analog.com. This model will

accurately simulate a number of parameters, both dc and ac.

References on Noise Dynamics and Flicker Noise

S. Franco, Design with Operational Amplifiers and Analog Integrated

Circuits, McGraw-Hill 1998.

The Best of Analog Dialogue, from Analog Devices.