Low noise, low distortion MOS amplifier circuit

Details Low noise, low distortion MOS amplifier circuit Low noise, low distortion MOS amplifier circuit

1993-11-12

1994-09-27

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330149, H03F 345, H03F 126

Patent

active

053510119

ABSTRACT:
In the case of amplifier circuits realised in modern MOS technology, non-linear distortion occurs as a result of the high field strengths in the channel region due to the small dimensions. This distortion is eliminated and noise is reduced in that the amplifier circuit comprises a first series combination of first and second MOS transistors, and a second series combination identical with the first series combination and forming a long tailed pair circuit with the latter. The long tailed pair circuit includes an additional differential amplifier having its output connected to the gate electrode of a load transistor of the long tailed pair circuit by way of a voltage divider. The transistors in the long tailed pair circuit are mutually identical.

REFERENCES:
patent: 5101126 (1992-03-01), Butler
ISSC74/ Feb. 14, 1974 Session XII: IC OP-AMP Techniques THPM 12.6: A Fast, High Precision, Laser-Trimmed FET OP-AMP.
"Analysis and Design of Analog Integrated Circuits", by Paul R. Gray and Robert G. Meyer, p. 720.

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