Patent ID: 7437084

Claim:
An infrared radiation receiving circuit that generates an output pulse by receiving an input pulse of infrared radiation, converting the input pulse into an electric signal, and amplifying the electric signal, comprising: a pulse generating section that generates the output pulse by turning an amplified signal amplified through an amplifier into a pulse by using a threshold value, and outputs the output pulse to an external entity; and a suspending section for suspending the pulse generating section from generating the output pulse after the output pulse is outputted until a predetermined first time elapses, wherein: the pulse generating section includes a comparator circuit that generates a comparator pulse whose pulse width corresponds to a time during which an absolute value of the amplified signal exceeds the threshold value; a trigger generating circuit that generates a trigger pulse in response to occurrence of the comparator pulse; and a one shot timer that outputs a one shot pulse having a predetermined pulse width, in response to occurrence of the trigger pulse.