Substrate bias voltage generated from refresh oscillator

Details Substrate bias voltage generated from refresh oscillator Substrate bias voltage generated from refresh oscillator

1975-11-28

1977-06-14

Fears, Terrell W.

Communications: electrical

Digital comparator systems

340173DR, G11C 1140

Patent

active

040300846

ABSTRACT:
Apparatus and method for generating substrate bias for the refresh apparatus of volatile memory elements associated with data processing units. A refresh oscillator in the refresh apparatus is utilized to drive a chopper circuit or high level driver in combination with a rectifier network for obtaining raw negative voltage. The raw voltage is filtered and adjusted to the correct value on the metal oxide semiconductor (MOS) memory board and distributed to each random access memory (RAM).

REFERENCES:
patent: 3651494 (1972-03-01), Lynch
patent: 3760380 (1973-09-01), Hoffmann

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