4

Test Circuits and Waveforms

FIGURE 1. LEAKAGE CURRENT TEST CIRCUIT

FIGURE 2. CHANNEL SEPARATION TEST CIRCUIT

FIGURE 3A. EFFECTS OF DIODE LINEARIZATION, WITH DIODE PROGRAMMING TERMINAL ACTIVE

FIGURE 3B. WITH DIODE PROGRAMMING TERMINAL CUTOFF

FIGURE 3. CA3280 TRANSFER CHARACTERISTICS

1/2

+

-

13

CA3280

3

14

4

1

16

15

I

30V

0V

TEST

POINT

+30V

1/2

+

-

13

CA3280

4

14

3

15

16

V+

0.1

µF

OUTPUT

10k

Ω

V+

V-

INPUT

30k

Ω

0.1

µF

1k

Ω

1k

Ω

30k

Ω

1/2

13

CA3280

1

14

4

3

15

16

15V

-15V

1k

Ω

V+

10k

Ω

10k

Ω

V-

Horizontal = 1V/Div.

1/2

12

CA3280

8

11

6

4

10

9

15V

1k

Ω

V+

10k

Ω

10k

Ω

-15V

V-

Horizontal = 25mV/Div.

CA3280, CA3280A