TV SIGNAL PROCESSING
In TV receivers and monitors the final recipient of the video signal is the picture tube, be it a monochrome or colour type. The tube requires a modulating voltage between its grid and cathode; normally the grid is clamped at some fixed potential and the modulating signal applied to the cathode. In a monochrome system that signal will be the video waveform in inverted form – to produce white the cathode must be driven down towards grid potential. In a colour-tube the grid is common to all three beams (Chapter 5) and the cathodes are fed by RGB video signals, negative-going for white.
TUBE-DRIVE AMPLIFIERS
Large picture tubes require a peak to peak voltage drive approaching 100 V to produce a bright contrasted ...
Get Newnes TV and Video Engineer's Pocket Book, 3rd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
