ML6428 S-Video Filter and 75W Line Drivers with Summed Composite Output FEATURES s s s GENERAL DESCRIPTION The ML6428 is a dual Y/C 4th-order Butterworth lowpass video filter optimized for minimum overshoot and flat group delay.
The device also contains a summing circuit to generate filtered composite video.
The Y and C input signals from DACs are AC coupled into the ML6428.
Both channels have DC restore circuitry to clamp the DC input levels during video sync.
The Y channel uses a sync tip clamp.
The CV and the C channels share a feedback clamp.
All outputs must be AC coupled into their loads for the -1 and -3 versions.
The -2 and -4 versions are DC coupled.
All inputs (-1, -2, -3 and -4 ...

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