Current compensation technique for an operational amplifier

Details Current compensation technique for an operational amplifier Current compensation technique for an operational amplifier

1992-08-11

1993-10-26

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330293, H03F 134

Patent

active

052569853

ABSTRACT:
An apparatus and method is disclosed for minimizing the loading effect of the feedback network on the output voltage of an op-amp circuit. A single current source is coupled to the output of the op-amp to provide a predetermined current. By properly selecting the current source to be equal to the current demanded by the feedback network, the output current of the op-amp is significantly reduced. In turn, the loading effects of the feedback network resistors on the op-amp are significantly reduced and the accuracy of the op-amp circuit gain is improved.

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patent: 4987379 (1991-01-01), Hughes
patent: 5051686 (1991-09-01), Schaffer
patent: 5107199 (1992-04-01), Vo et al.

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