Integrated circuit sensing and digitally biasing the threshold v

Details Integrated circuit sensing and digitally biasing the threshold v Integrated circuit sensing and digitally biasing the threshold v

1996-12-08

1998-11-10

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327535, G05F 710

Patent

active

058349669

ABSTRACT:
An integrated circuit includes a plurality of MOSFETs on a substrate. A plurality of sensing MOSFETs are used to generate a plurality of comparison signals based upon comparing signals related to the sensed initial threshold voltages to respective reference voltages from a spread of high to low reference voltage values. The MOSFETs are biased to have a desired effective threshold voltage based upon the plurality of comparison signals. Logic decoding circuits accept the plurality of comparison signals and generate at least one bias control signal. Bias circuits are responsive to the at least one bias control signal for generating a desired bias voltage from among a plurality of bias voltages having a spread of high to low bias voltage values to thereby bias the plurality of MOSFETs to the desired effective threshold voltage. Method aspects of the invention are also disclosed.

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Pierret, "Field Effect Devices" vol. IV, published by Addison-Wesley Publishing Company, pp. 120-122, 1990.

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