Arrangement for cancelling the input bias current, at picoampere

Details Arrangement for cancelling the input bias current, at picoampere Arrangement for cancelling the input bias current, at picoampere

1984-08-03

1986-03-11

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, 330296, H03F 345

Patent

active

045756856

ABSTRACT:
An arrangement for cancelling the input bias current, at picoampere levels, in linear integrated circuits such as operational amplifiers, comparators, and the like is disclosed herein. This arrangement utilizes circuitry including a tracking transistor which is virtually independent of the presence or absence of leakage current in the overall integrated circuit, even at relatively high temperatures, for example 125.degree. C., where leakage current can be most significant.

REFERENCES:
patent: 4068254 (1978-01-01), Erdi

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