Video signal processing circuit

Details Video signal processing circuit Video signal processing circuit

H - Electricity

04

N

350/37, 352/19.3

H04N 5/20 (2006.01) H04N 5/923 (2006.01)

Patent

CA 1099395

ABSTRACT OF THE DISCLOSURE A video signal processing circuit includes an amplifier with a circuit connected to it to emphasize the amplification of some frequencies relative to others. A non-linear circuit is also connected to the amplifier and comprises a capacitor connected in series with non-linear elements that change the amplification of positive and negative overshoots of the sig- nal relative to the middle amplitude range. The result is non-linear modification of emphasis and can be used to pre- emphasize video signals before using them to modulate the frequency of a carrier and, in the playback section to de- emphasize the signals to minimize FM noise. Use of the capacitor prevents direct current from flowing and thus af- fecting the threshold levels of the non-linear elements. Component values can be selected to effect temperature com- pensation.

284127

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