Intrinsic offset recovery circuit particularly for amplifiers

Details Intrinsic offset recovery circuit particularly for amplifiers Intrinsic offset recovery circuit particularly for amplifiers

1991-12-17

1993-04-20

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, H03F 345

Patent

active

052046389

ABSTRACT:
Intrinsic offset recovery circuit particularly for amplifiers, which comprises an input differential amplifier constituted by a first PNP transistor, by a second PNP transistor, by a third NPN transistor, by a fourth NPN transistor and by a first constant-current source, and a unitary-gain output stage. The recovery circuit furthermore comprises, as connection between the input differential amplifier and the unitary-gain output stage, a gain stage which comprises a fifth NPN transistor which is connected to the output of the input differential amplifier and is connected to a sixth NPN transistor and to a seventh PNP transistor. The seventh transistor is connected to the sixth transistor. The seventh transistor and the sixth transistor are connected to the unitary-gain output stage.

REFERENCES:
patent: 4030044 (1977-06-01), Davis
patent: 5105145 (1992-04-01), Neth

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