Dual mode horizontal deflection circuit
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United States of America Patent
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-
Aug 2, 1983
Grant Date -
N/A
app pub date -
Feb 11, 1981
filing date -
Feb 11, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A horizontal deflection turn-on circuit operates in the absence of trigger pulse normally derived by an AFPC loop. Under normal operation, the AFPC loop generates the trigger pulses based on a synchronized phase relationship with sampled flyback pulses. During receiver start-up, the flyback pulses are not present and no trigger pulses are generated. The turn on circuit provides auxiliary pulses which occur later in time than the normal occurrence of the trigger pulses. Means are provided for applying the auxiliary pulses to the horizontal deflection circuit only in the absence of normal trigger pulses.
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