High-precision analog reading circuit for flash analog memory ar

Details High-precision analog reading circuit for flash analog memory ar High-precision analog reading circuit for flash analog memory ar

1998-04-14

2000-01-18

Tran, Andrew Q.

Static information storage and retrieval

Floating gate

Particular biasing

3651852, 365210, G11C 1606

Patent

active

060162724

ABSTRACT:
An analog reading circuit having a current mirror circuit forcing two identical currents into a cell to be read and into a reference cell. An operational amplifier has an inverting input connected to the drain terminal of the cell to be read, a non-inverting input connected to the drain terminal of the reference cell, and an output connected to the gate terminal of the reference cell. The reference cell therefore forms part of a negative feedback loop which maintains the overdrive voltages of the cell to be read and the reference cell constant, irrespective of temperature variations. The reading circuit is also of high precision and has a high reading speed.

REFERENCES:
patent: 5616510 (1997-04-01), Wong
patent: 5699295 (1997-12-01), Yero
patent: 5748534 (1998-05-01), Dunlap et al.
patent: 5859798 (1999-01-01), Yero

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