High voltage generating circuit for semiconductor devices having

Details High voltage generating circuit for semiconductor devices having High voltage generating circuit for semiconductor devices having

1991-08-13

1993-03-23

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With voltage multiplication means

3072962, H02M 307

Patent

active

051969963

ABSTRACT:
A high voltage generating circuit for semi-conductor devices which removes a threshold voltage and generates a high voltage above a source voltage or a negative voltage below a ground voltage, comprising an oscillation signal generating circuit, clamping circuits 51 and 52 and charge pump circuits 53 and 54, for inputting first to fourth oscillation signals from said oscillation signal generating means, and a charge transfer circuit 55. Also, the high voltage generating circuit according to the present invention comprises an initial state control circuit 56 for controlling an initial state of a final output stage Vpp. The present high voltage generating circuit removes a threshold voltage loss in clamping and charge transfer devices to increase an efficiency of the semi-conductor device. Therefore, a sufficient high voltage above the source voltage can be used to prevent a malfunction of the semi-conductor device.

REFERENCES:
patent: 4559548 (1985-12-01), Iizuka et al.
patent: 4621315 (1986-11-01), Vaughn et al.
patent: 4733108 (1988-03-01), Truong

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