H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/81
H04N 5/21 (2006.01) H03D 3/18 (2006.01) H03J 7/08 (2006.01) H04N 5/50 (2006.01)
Patent
CA 1038076
ABSTRACT: Correction of the influence of noise on the output voltage of a detection circuit for automatic fre- quency control by using a product demodulator with a filter having a pole at the picture intermediate frequency and a zero crossing at a frequency between a sound inter- mediate frequency and the picture intermediate frequency. -9-
205737
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