Differential amplifier with low noise offset compensation

Details Differential amplifier with low noise offset compensation Differential amplifier with low noise offset compensation

1988-09-09

1989-11-28

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330 9, H03F 345

Patent

active

048840394

ABSTRACT:
A differential amplifier having input and output stages includes a linear offset operation circuit comprising sources providing a reference voltage and an offset correction voltage and a pair of transistors coupled for linear operation and responsive to the voltages for supplying differential related offset correction currents to the amplifier output stage for reducing offset characteristic of the amplifier stages and for reducing output noise and offset attributable to a noise component of the reference voltage source.

REFERENCES:
patent: 4004245 (1977-01-01), Ochi et al.
patent: 4423385 (1983-12-01), Evans
patent: 4622521 (1986-11-01), Redfern
patent: 4707667 (1987-11-01), Bertsch
Preliminary Data Sheet LTC 1050 Chopper Stabilized Operational Amplifier, Pub. by Linear Technology Corp., Mar. 1988.

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