ZXFV401

The ZXFV401 provides the ability to separate out video synchronisation signals for a wide variety of TV and CRT display systems, standard and non-standard.

Flexibility arises from the use of just three external resistors to adapt to each application. One resistor controls a fully integrated internal colour carrier filter with variable bandwidth. This filter aviods disturbance from the colour carrier, permitting accurate threshold slicing for timing extraction.

A second resistor controls the voltage threshold for loss of signal detection after a time-out interval. The third resistor controls the timing functions.

DC restoration for displays is facilitated by the Back Porch synch output, which can be used to drive an external curcuit to clamp the blanking voltage to a fixed level.