Precharge circuit

Details Precharge circuit Precharge circuit

1991-11-29

1993-05-18

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307264, 3072962, 307482, 307583, H03K 17687, H03K 1901

Patent

active

052124150

ABSTRACT:
A precharge circuit is provided with a step-up node circuit including a capacitor for delivering a drive voltage at a predetermined level to a load, and for raising the voltage level of the drive voltage so that it becomes equal to a value greater than the predetermined level by a specific value. This precharge circuit at least comprises a main P-channel MOS transistor for delivering the drive voltage at the predetermined level to the load through the step-up node circuit when a step-up input signal delivered to the step up node circuit is at a ground level, and a subsidiary P-channel MOS transistor for interrupting supply of the step-up input signal immediately before the drive voltage is raised to the predetermined level by the step-up input signal. Accordingly this precharge circuit normally operates immediately after being powered. Thus, initialization becomes unnecessary.

REFERENCES:
patent: 5021686 (1991-06-01), Kawata et al.
patent: 5029282 (1991-07-01), Ito
IBM Tech. Discl Bul. vol. 29 No. 1, Jun. 1986 "Charge Pump Circuit for a CMOS Substrate Generator".
IBM Tech. Disc. Bul. vol. 31 No. 1 Jun. 1988 "Circuit for pumping current out of a negative substrate".

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