Power source apparatus

Details Power source apparatus Power source apparatus

1988-08-23

1990-01-02

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323903, 355 3CH, G05F 146

Patent

active

048915726

ABSTRACT:
A power source apparatus includes a high-voltage power source for applying a high voltage to a charger in a printer or copying machine, series-connected resistors for detecting a voltage of a grid or shield of the charger, and a transistor, inserted between ground and the grid or shield, for controlling the voltage of the grid or shield in accordance with an output from the series-connected resistors. The transistor may be an npn, pnp, or field effect transistor.

REFERENCES:
patent: 3120635 (1964-02-01), Tully, Jr.
patent: 3359483 (1967-12-01), Biard
patent: 4166690 (1979-09-01), Bacon et al.
Cappa et al., "Short--Circuit Protection With Optical Isolation," IBM Technical Disclosure Bulletin, vol. 20, No. 6, Nov. 1977, pp. 2145-2155.

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