Delayed reaction automatic kinescope biasing system

Details Delayed reaction automatic kinescope biasing system Delayed reaction automatic kinescope biasing system

1982-06-23

1984-05-22

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 65, 358243, H04N 568, H04N 920

Patent

active

044504764

ABSTRACT:
An automatic kinescope bias (AKB) control system for a television receiver operates in response to an enabling timing signal for maintaining a desired level of kinescope blanking current. The timing signal is applied to a control input of the AKB system via a timing signal coupling path. The timing signal input to the AKB system is inhibited for a given time interval after the receiver is initially energized, to delay AKB action until the kinescope has reached a desired operating temperature. The timing signal is inhibited by means of a control network coupled to the timing signal path. The given time interval is determined by a time constant circuit which is associated with the control network and which is substantially insensitive to the amplitude, and duty cycle of the timing signal.

REFERENCES:
patent: 3924067 (1975-12-01), Arneson
patent: 4110693 (1978-08-01), Evans
patent: 4263622 (1981-04-01), Hinn
Schematic Circuit Diagram of SABA/Nordmende European Color Television Receiver.

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