Patent ID: 7383031

Claim:
A receiving circuit for a radio-wave clock broadcast wave comprising: a receiver for an AM radio broadcast wave which includes: a first high frequency amplifier that amplifies a received signal of the AM radio broadcast wave, an oscillator, a frequency mixer that mixes a signal output from the first high frequency amplifier with an oscillating signal of a first frequency generated by the oscillator thereby generating a signal of an intermediate frequency, an intermediate frequency amplifier that amplifies the signal of the intermediate frequency, and a detector that demodulates a signal output from the intermediate frequency amplifier; a second high frequency amplifier that amplifies a received signal of the radio-wave clock broadcast wave; a frequency converter that mixes a signal output from the second high frequency amplifier with an oscillating signal of a third frequency thereby converting into a signal of a frequency in a bandwidth of the AM radio broadcast wave; and a control circuit that makes the signal of the frequency in the AM radio broadcast wave bandwidth converted into by the frequency converter be input to the first high frequency amplifier and supplies a demodulated signal of the radio-wave clock broadcast wave that is output from the detector to a circuit performing time correction on the basis of the demodulated signal.