Charge pump system for non-volatile ram

Details Charge pump system for non-volatile ram Charge pump system for non-volatile ram

1983-11-14

1987-01-20

Moffitt, James W.

Static information storage and retrieval

Powering

G11C 1124

Patent

active

046384642

ABSTRACT:
A voltage generating system provides a plurality of different voltages for powering a dynamic nonvolatile random access memory (NVRAM) chip. The voltage generating system includes a pair of charge pumps. Each charge pump is coupled to a controller that senses the voltage level at the output of the charge pump and generates an enabling signal when said voltage is at a predetermined value. The signal activates a power down circuit which adjusts the charge pump output to a desired voltage level. A programmable oscillator provides the clocking signals for the controller. The charge pumps and programmable oscillators are periodically deactivated. As a result, the overall power consumption of the chip is reduced.

REFERENCES:
patent: 4322643 (1982-03-01), Preslar
patent: 4534018 (1985-08-01), Eckert et al.

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