SIMPLE_NTSC_GRAY_SCALE_VIDEO_GENERATOR

Published:2009/6/24 21:46:00 Author:May | From:SeekIC

A 4.032-MHz crystal oscillator (256 x horizontal line scan rate) drives a BCD counter. The binary outputs of the counter are fed to R2 through R5, a simple weighting network for D/A conversion, re-sulting in a staircase video output with a rep rate of 15.75 kHz. This circuit should be useful for am-ateur TV linearity testing and setup purposes.



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