Differential amplifier circuit having low noise input transistor

Details Differential amplifier circuit having low noise input transistor Differential amplifier circuit having low noise input transistor

1996-09-18

1998-09-22

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Nonlinear amplifying circuit

327 53, 327 66, 327391, 330253, 330257, H03F 345

Patent

active

058120220

ABSTRACT:
A differential amplifier circuit whose noise is reduced when used in a CMOS operational amplifier without increasing its cost includes a differential input stage circuit in which gate lengths of load transistors and gate lengths of differential input transistors are set to an optimal ratio to minimize internal transistor noise components.

REFERENCES:
patent: 4346344 (1982-08-01), Blauschild
patent: 5130666 (1992-07-01), Nicollini
patent: 5357149 (1994-10-01), Kimura
patent: 5440272 (1995-08-01), Orisaka et al.
patent: 5600275 (1997-02-01), Garavan
patent: 5621374 (1997-04-01), Harkin
patent: 5635880 (1997-06-01), Brown

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