Non-volatile analog memory circuit with closed-loop control

USH1035H · kind H · statutory invention registration

Assignee

• United States of America as represented by the Secretary of the Air Force · US

Inventors

• Gene L. Haviland · Village of La Jolla, US
• Patrick A. Shoemaker · Lemon Grove, US
• James R. Feeley · Village of La Jolla, US
• Alfons Tuszynski · Village of La Jolla, US

Key dates

• Grant date: Mar 3, 1992

Classification

• Technology area (CPC —): General

Abstract

A non-volatile analog memory circuit includes charge depositing and storing ircuitry, voltage sensing circuitry, and closed-loop control circuitry. The charge depositing and storing circuitry includes a floating gate operable to receive charge deposited on it. The voltage sensing circuitry supplies an analog output in response to the sensed gate potential. The closed-loop control circuitry is used to control charge deposition. The control circuitry is operable to change the charge on the gate by directing electrical pulses of appropriate polarity to the charge depositing and storing circuitry. This is done to diminish the error between the analog output signal of the charge sensing circuitry and an analog input signal for providing a substantially accurate representation of the analog input signal.