Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1993-07-27
1996-10-22
Wysocki, Jonathan
Electrical transmission or interconnection systems
Switching systems
Condition responsive
363 21, 363 71, 378111, H02M 300
Patent
active
055679978
ABSTRACT:
Disclosed is a three-value power supply device, adapted for supplying developing bias voltages to a copying machine. The device comprises a positive high voltage source, a negative high voltage source, first and second high voltage transistors serially connected between the positive and negative high voltage sources, with an output terminal connected to the junction point between two transistors, and a timing controller for selectively turning on and off the two transistors.
REFERENCES:
patent: 4747012 (1988-05-01), Maebra et al.
patent: 4868729 (1989-09-01), Suzuki et al.
patent: 5173847 (1992-12-01), Suzuki
patent: 5229818 (1993-07-01), Nakahara et al.
Saito Hiroshi
Suzuki Koji
Canon Kabushiki Kaisha
Paladini Albert W.
Wysocki Jonathan
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