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Clamped AC-Input Video Cable Driver

2016-08-05 00:29  
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View Full Size Image View Original Design NoteClamped AC-Input Video Cable Driver

This circuit shows a means of driving composite video on standard 75Ω cable with just a single 3.3V power supply. This is possible due to the low output saturation levels of the LT6205 and the use of input clamping to optimize the bias point of the amplifi er for standard 1VP-P source video. The circuit provides an active gain of two and 75Ω series termination, thus yielding a net gain of one as seen by the destination load (e.g. display device).

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