A radio-frequency (RF) receiver includes an input terminal for receiving
RF signals in a first frequency band and a second frequency band lower
than the first frequency band, a first tuned filter allowing a signal of
a passing frequency in the RF signal in the first frequency band to pass
through the filter, a local oscillator, a frequency divider for
frequency-dividing a signal output from the local oscillator, a first
mixer operable to convert the signal output from the first tuned filter
into a signal of an intermediate frequency, a second tuned filter
allowing a signal of a passing frequency of the RF signal in the second
frequency band to pass through the filter, a second mixer operable to
convert the signal output from the second tuned filter into a signal of
the intermediate frequency, and a phase-locked-loop (PLL) circuit
operable to control an oscillation frequency of the local oscillator and
the passing frequencies of the first tuned filter and the second tuned
filter.