VIDEO_DC_RESTORER

Published:2009/7/9 2:42:00 Author:May | From:SeekIC

The main requirement for efficient dc restoration is to provide a short time－constant during the clamp period，with a long time－constant during the active line time．The switch within the Harris HI201HS has anon resistance of 30 Ω and the PMI buffer， BUF03，has an input resistance of 50 MΩ．The tuned circuit presents a high impedance at the 4.43－MHz color subcarrier frequency SO that the color－burst signal is retained if the video signal contains this information，



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