Abstract: The self-bias adjustment circuit is provided on the previous stage of an internal circuit. This self-bias adjustment circuit adjusts a bias of an input signal and supplies an appropriate signal to the internal circuit. The self-bias adjustment circuit includes a detection circuit 11a that detects the bias voltage of the input signal, and a superposing circuit 11b that superposes a correction voltage for correcting the bias voltage to a predetermined value on the input signal on the basis of the bias voltage detected by the detection circuit. The result signal is supplied to the internal circuit.

Abstract: The amplifier circuit includes differential amplifier circuits (3 to 4); a peak detector circuit (7) for detecting a peak value of an output voltage of a differential amplifier circuit 4 of the last stage; an offset compensation voltage generator circuit (8) for generating an offset compensation voltage for offset compensation on the basis of a detection result of the peak detector circuit (7); and an offset output limiter circuit (9) for limiting the offset compensation voltage generated by the offset compensation voltage generator circuit (8) into a predetermined range and feeding back the limited offset compensation voltage to a differential amplifier circuit (3) of the first stage.

Abstract: The amplifier circuit includes differential amplifier circuits (3 to 4); a peak detector circuit (7) for detecting a peak value of an output voltage of a differential amplifier circuit 4 of the last stage; an offset compensation voltage generator circuit (8) for generating an offset compensation voltage for offset compensation on the basis of a detection result of the peak detector circuit (7); and an offset output limiter circuit (9) for limiting the offset compensation voltage generated by the offset compensation voltage generator circuit (8) into a predetermined range and feeding back the limited offset compensation voltage to a differential amplifier circuit (3) of the first stage.

Abstract: The self-bias adjustment circuit is provided on the previous stage of an internal circuit. This self-bias adjustment circuit adjusts a bias of an input signal and supplies an appropriate signal to the internal circuit. The self-bias adjustment circuit includes a detection circuit 11a that detects the bias voltage of the input signal, and a superposing circuit 11b that superposes a correction voltage for correcting the bias voltage to a predetermined value on the input signal on the basis of the bias voltage detected by the detection circuit. The result signal is supplied to the internal circuit.