• on Audio/Video/Photography
  • Published in issue 7/2001 on page 0
About the article

Video Line Driver

This circuit is a video line driver specifically intended for use with a single-ended power supply. As a matter of fact, the synchronised outputs of a line driver for composite-video signals go negative with respect to ground. In order to be able to process these negative signals in a circuit powered from a single-ended supply, it is necessary to AC-couple the input of the opamp as well as level-shift the signal in the positive direction.
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R1,R7 = 75?
R2...R4 = 4k?7
R5,R6 = 1k?
C1,C4,C5,C7C10,C12 = 100nF
C2 = 47µF 16V radial
C3,C11 = 10µF 6 V radial
C6 = 220µF 6 V radial
C8 = 1000 µF 6V radial
C9 = 100µF 16V radial
D1 = 1N4001
IC1 = OPA353UA
IC2 = 78L05
PC1-PC6 = PCB solder pin
Case, e.g., Hammond type 1590A
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