SIGNAL PROCESSING CIRCUIT

摘要

[PROBLEMS] To provide a signal processing circuit capable of reducing noise and distortion attributed to a multi path noise. [MEANS FOR SOLVING PROBLEMS] A signal processing circuit includes: an attenuation unit for attenuating a demodulated signal obtained by detecting a reception signal; a detection unit for detecting a first signal indicating the intensity of the demodulated signal; and an attenuation ratio setting unit for setting an attenuation ratio of the attenuation unit according to the first signal. The attenuation ratio setting unit sets the attenuation ratio of the attenuation unit according to at least one of a second signal indicating a change of an envelope obtained according to an intermediate-frequency signal of the reception signal and a third signal indicating the field intensity obtained according to the intermediate-frequency signal, and according to the first signal.