| 摘要 |
In a switched capacitor amplifier circuit of an offset cancellation type, a capacitor is arranged between a reverse input terminal of an operational-transconductance amplifier and a reference voltage. Only in an offset cancelling operation in which a first group of switches are on, the capacitor functions as a load of the amplifier. The capacitor hence does not exert any influence upon transfer of charge. With provision of the circuit, the phenomenon of oscillation is suppressed in the operation to cancel the offset voltage.
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