Input stage offset compensation device

Details Input stage offset compensation device Input stage offset compensation device

1993-01-28

1994-08-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, 330261, H03F 345

Patent

active

053390423

ABSTRACT:
A device for compensating the offset of an input stage having two current output legs, the first of which is connected to the input of a real stage pushing into this first leg a parasitic current; the device including a fake stage pushing a compensation current having a value equal to the value of the parasitic current divided by a predetermined factor greater than 1, this compensation current being amplified by an amplifier having a gain equal to said predetermined factor, before being pushed into the second output leg of the input stage.

REFERENCES:
patent: 4612464 (1986-09-01), Ishikawa et al.
patent: 5045806 (1991-09-01), Yan
Patent Abstracts of Japan, vol. 6, No. 25 (E-94)(903) Feb. 13, 1982 & JP-A-56144614 (Toukou K.K.) Nov. 11, 1981.

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