Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
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
Dobkin Robert C.
Erdi George
Nelson Carl T.
LaRoche Eugene R.
Linear Technology Corporation
Mattola Steven J.
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