Offset compensating circuit

An offset compensating circuit which is incorporated in a circuit to be compensated for an offset induced therein, comprising:

• bipolar voltage generator means for producing either a positive reference voltage or a negative reference voltage in accordance with the polarity of an output signal produced from said circuit to be compensated;
• and
• switched capacitor type integration circuit means for receiving said positive or negative reference voltage from said bipolar voltage generator means and producing an offset compensating voltage to be combined with an input signal to be applied to said circuit to be compensated in a negative feedback mode, wherein the switched capacitor type integration circuit means is comprised of a first capacitor acting as a sample-and-hold capacitor, an operational amplifier connected to a second capacitor acting as an integration capacitor, and switching means for alternately charging the first capacitor by said positive or negative reference voltage and transferring the charge of said first capacitor to said second capacitor.