H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/86, 328/88
H04N 5/06 (2006.01) H04N 5/12 (2006.01) H04N 5/44 (2006.01)
Patent
CA 1040300
Abstract of the Disclosure Frequency doubled television receiver horizontal deflection frequency signals are divided in a divide-by-525 counter to produce pulses at the vertical deflection rate. The five hundred twentieth pulse of each 525 pulse series is used to enable a bistable multivibrator which produces an enabling signal on an "and" gate. The five hundred twenty-fifth pulse of each 525 pulse series produces a resetting signal on an "or" gate. The fifth pulse of each 525 pulse series removes the enabling signal from the out- put terminal of the bistable multivibrator thereby inhibiting the "and" gate. The vertical sync pulse appearing between the five hundred twentieth pulse of each 525 pulse series and the fifth pulse of the next succeeding 525 pulse series passes through the enabled "and" gate and synchronizes the operation of the vertical deflection circuit. The vertical deflection sync pulse is also coupled to the "or" gate to reset the divide-by-525 counter and synchronize its oper- ation to the incoming vertical sync.
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