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FN7103.9

September 14, 2010

Single Supply Video Line Driver

The EL8100, EL8101 are wideband rail-to-rail output op

amplifiers with large output current, excellent dG, dP, and low

distortion that allow them to drive video signals in low supply

applications. Figure 31 is the single supply non-inverting

video line driver configuration and Figure 32 is the inverting

video ling driver configuration. The signal is AC-coupled by

big enough to minimize the droop of the luminance signal.

FIGURE 30. ENABLE SIGNAL

0V

-0.5V

-1.5V

-2.5V

1V

0V

M = 50ns/DIV

A

ENABLE

B

-1V

FIGURE 31. 5V SINGLE SUPPLY NON INVERTING VIDEO LINE

DRIVER

5V

75

Ω

+

-

75

Ω

1k

Ω

75

Ω

470µF

47µF

10k

10k

1k

Ω

220µF

FIGURE 32. 5V SINGLE SUPPLY INVERTING VIDEO LINE

DRIVER

5V

75

Ω

-

+

75

Ω

500

Ω

75

Ω

470µF

47µF

10k

10k

1k

Ω

220µF

5V

FIGURE 33. VIDEO LINE DRIVER FREQUENCY RESPONSE

5

4

3

2

1

0

-1

-2

-3

-4

-5

100K

1M

10M

100M 200M

FREQUENCY (Hz)

EL8100, EL8101