Remote controlled television receiver power supply

Details Remote controlled television receiver power supply Remote controlled television receiver power supply

1984-12-24

1987-03-17

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581941, H04N 318

Patent

active

046512144

ABSTRACT:
A mains rectified DC input voltage is applied to a series-pass regulator to develop a regulated B+ supply voltage. To reduce dissipation in the series-pass transistor, a shunt resistor parallels the series-pass transistor. To place the remote controlled television receiver in the standby-mode of operation, a remote standby control circuit applies an on/off command signal to the horizontal deflection circuit. Operation of the horizontal deflection circuit during the off-state of the command signal is disabled, thereby disabling the flyback transformer derived voltage supplies. A thyristor is placed in series with the shunt resistor and blocks current flow to the B+ supply terminal from the input voltage terminal during standby. To resume run-mode operation, the remote standby control circuit generates the on-state of the command signal to reenable horizontal deflection circuit. Current flowing to the B+ supply terminal from the regulator series-pass transistor also flows in an inductor to induce a voltage that is coupled to the gate of the thyristor to turn on the thyristor and reconnect the shunt resistor in parallel with the series-pass transistor.

REFERENCES:
patent: 4024577 (1977-05-01), Diethelm
patent: 4156168 (1980-05-01), Hicks
patent: 4387324 (1983-06-01), Willis
patent: 4392070 (1983-07-01), Rinehart et al.
patent: 4500923 (1985-02-01), Duvall et al.
patent: 4532457 (1985-07-01), Haferl

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