Patent ID: 7184733

Claim:
A high frequency receiving device wherein high frequency signals of a first frequency band and of a second frequency band lower than the first frequency band are inputted, and a desired receiving channel signal is extracted from the high frequency signal by an amplifier including a tuning circuit, and the extracted signal is mixed with a local oscillation signal produced by using a local oscillation output signal outputted from a local oscillator, thereby converting the signal into an intermediate frequency signal that is a constant frequency to be outputted, comprising: an amplifier for extracting a desired receiving channel signal by selecting a frequency according to supplied tuning voltage out of the high frequency signal input; a local oscillator for producing a local oscillation output signal of a frequency according to the tuning voltage supplied; a local oscillation selector wherein the local oscillation output signal is inputted, and the local oscillation signal whose frequency is divided by a predetermined dividing ratio with respect to the frequency of the local oscillation output signal is outputted; a mixer which mixes a signal from the amplifier with the local oscillation signal from the local oscillation selector, and outputs an intermediate frequency signal that is a predetermined intermediate frequency; and a PLL circuit wherein the local oscillation signal is inputted, and the tuning voltage according to the frequency of the local oscillation signal is produced, and the tuning voltage is supplied to the amplifier and the local oscillator, wherein the local oscillator has an oscillation frequency changing means which changes the oscillation frequency characteristic of the local oscillation output signal in relation to the tuning voltage in accordance with the first frequency band or the second frequency band.