Integrated power level control and on/off function circuit

Details Integrated power level control and on/off function circuit Integrated power level control and on/off function circuit

1989-12-26

1991-04-02

Stephan, Steven L.

Electricity: power supply or regulation systems

External or operator controlled

Phase controlled switching using electronic tube or a three...

323300, 323325, 323905, 315194, 315291, 315DIG4, G05F 502, G05B 2402

Patent

active

050049720

ABSTRACT:
A load power control circuit which adjusts the level of power provided by a load in response to changes in the impedance across control terminals includes a control circuit which disconnects the load from the power source when the voltage across the control terminals in within a certain range. The control circuit is particularly useful in controlling fluorescent light fixtures controlled by electronic ballasts because the control circuit avoids the need for a separate on/off switch for the fixtures.

REFERENCES:
patent: 4563592 (1986-01-01), Yuhasz et al.
patent: 4612478 (1986-09-01), Payne
patent: 4628230 (1986-12-01), Krokaugger
patent: 4651060 (1987-03-01), Clark
patent: 4668877 (1987-05-01), Kunen
patent: 4689547 (1987-08-01), Rowen et al.
patent: 4701680 (1987-10-01), Alley et al.
patent: 4704563 (1987-11-01), Hussey
patent: 4712045 (1987-12-01), Van Meurs
patent: 4717863 (1988-01-01), Zeiler
patent: 4745351 (1988-05-01), Rowen et al.

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