Zero power SRAM precharge

Details Zero power SRAM precharge Zero power SRAM precharge

1999-09-30

2000-08-22

Tran, Andrew Q.

Static information storage and retrieval

Read/write circuit

Precharge

365202, 365190, 365227, G11C 712

Patent

active

061082570

ABSTRACT:
A precharge circuit is provided that produces a reference voltage that can be used for the precharge process, without a direct current flow from the supply voltage. In a preferred embodiment of this invention, the precharge circuit precharges one bus to the supply voltage, and the other bus to ground potential, then, while each bus is capacitively charged to each of the supply and ground potentials, the buses are connected together. Assuming substantially equal capacitance on each bus, the resultant voltage on each bus will be half the supply voltage. A charge transfer effects the precharging of the buses to the supply and ground potential; the only current drawn from the power source is the transient current associated with a switch of capacitive loads.

REFERENCES:
patent: 5453951 (1995-09-01), Proebsting
patent: 5546338 (1996-08-01), Proebsting

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