| 摘要 |
A circuit for compensating for the departure from its nominal value of the gain of a current mirror amplifier (CMA). This departure is caused by the presence of base current in one current path of the CMA that is not present in the other current path. The common terminal current of the CMA is sensed and a circuit responsive to this current causes a current to flow at the CMA output terminal that is essentially equal to the aforementioned base currents thereby causing the CMA gain to more closely equal its nominal value. The compensated CMA may be advantageously used in combination with a differential amplifier to reduce the offset voltage of this amplifier.
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