OPA622

18

®

FIGURE 18. Video Distribution Amplifier.

FIGURE 19. Wideband Multiplier Output Amplifier.

FIGURE 20. Current-Feedback Amplifier with Two Equal and High Impedance Inputs.

R

open-loop pole; R

+G

R

2

R

N

CFA

OB

–5V

R

QC

630

Ω

R

IN

150

Ω

R

IN

150

Ω

V

IN

V

IN

3

8

R

N

180

Ω

R

2

180

Ω

9

1pF

C

OTA

V

+–

–

+

–

330

Ω

75

Ω

OPA622

AP

330

Ω

75

Ω

V

OUT

75

Ω

75

Ω

V

OUT

75

Ω

75

Ω

V

OUT

75

Ω

9

3

4

13

8

R

OG

150

Ω

Bandwidth, (5Vp-p) = 150MHz (OPA622AP)

200MHz (OPA622AU)

High output current drive capability (6Vp-p

into 50

Ω) allows three back-terminated 75Ω

transmission lines to be simultaneously driven.

Video

Input

75

Ω Transmission Line

150

Ω

X

Y

Wideband

Multiplier

50

Ω

50

Ω

100

Ω

100

Ω

100

Ω

100

Ω

100

Ω

150

Ω

10

Ω

100

Ω

330

Ω

50

Ω

10

Ω

V

IN2

V

IN1

1µF

1µF

+6V

4

3

6

5

8

13

9

10

11

12

+6V

1µF

V

OUT

–6V

–6V

OPA622