Patent ID: 8330520

Claim:
A limiter circuit to which an input signal voltage, an upper limit threshold signal voltage and a lower limit threshold signal voltage are inputted, comprising: an upper limit limiter circuit having a pair of transistors switchable ON and OFF in response to levels of the input signal voltage and the upper limit threshold signal voltage, for cutting voltage components higher than the upper limit threshold signal voltage from the input signal voltage, increasing the input signal voltage, and outputting an upper limit signal voltage; a lower limit threshold correcting circuit for correcting the lower limit threshold signal voltage in accordance with a voltage to which the input signal voltage is increased by the upper limit limiter circuit, and outputting a lower limit threshold correction signal voltage; a lower limit limiter circuit having a differential pair of transistors switchable ON and OFF in response to levels of the upper limit signal voltage and the lower limit threshold correction signal voltage, for cutting voltage components lower than the lower limit threshold correction signal voltage from the upper limit signal voltage, decreasing the upper limit signal voltage, and outputting an upper and lower limit signal voltage; a potential correcting circuit for correcting the lower limit threshold correction signal voltage in accordance with a voltage to which the upper limit signal voltage is decreased by the lower limit limiter circuit, and outputting a first reference signal voltage; and an adding and subtracting circuit for generating an output signal voltage by adding a second reference signal voltage inputted separately, to a signal voltage generated according to a voltage difference between the upper and lower limit signal voltage and the first reference signal voltage; whereby the limiter circuit allows passage of only signal voltage components of the input signal voltage included in ranges of the upper limit threshold signal voltage and the lower limit threshold signal voltage.