Driving circuit having differential and H-bridge circuits for lo

Details Driving circuit having differential and H-bridge circuits for lo Driving circuit having differential and H-bridge circuits for lo

1997-11-25

1999-08-17

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327108, 327423, 327508, 330146, 363 63, H03K 1756

Patent

active

059399317

ABSTRACT:
A driving circuit has first and second output terminals for connection with a load, for supplying the load with a constant voltage changing in polarity at predetermined timing, through the output terminals. A bridge circuit has first and second output nodes connected, respectively, to the first and second output terminals. A selector circuit selectively drives a plurality of current changeover switching elements of the bridge circuit. First and second differential amplifier circuits have first input terminals supplied with a predetermined reference voltage and second input terminals connected, respectively, to the first and second output nodes, and a common output terminal. A switching circuit selectively connects the first and second differential amplifier circuits to a power source in response to selective driving of the current changeover switching elements by the selector circuit. A bypass circuit is connected to the common output terminal of the first and second differential amplifier circuits to have conductivity thereof controlled by an output from the common output terminal, for bypassing part of current from the constant current source such that output voltage from the bridge circuit becomes equal to the predetermined reference voltage

REFERENCES:
patent: 4805214 (1989-02-01), Fensch et al.
patent: 5631595 (1997-05-01), Lakshmikumar

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