Subthreshold CMOS amplifier with offset adaptation

Details Subthreshold CMOS amplifier with offset adaptation Subthreshold CMOS amplifier with offset adaptation

1988-12-09

1990-06-19

Mullins, James B.

Amplifiers

With periodic switching input-output

330253, 330261, 330264, 330307, 330308, 357 235, H03F 345

Patent

active

049357026

ABSTRACT:
An integrated circuit amplifier having a random input offset voltage is adaptable such that the input offset voltage may be cancelled out. An input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage.

REFERENCES:
patent: 4665426 (1987-05-01), Allen et al.
Glasser, Lance A., "A UV Write-Enabled PROM," 1985 Chapel Hill Conference on Very Large Scale Integration, Ed. H. Fuchs, Computer Science Press, pp. 61-65.

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