Patent ID: 7190943

Claim:
A circuit for frequency translating a radio frequency signal, comprising: a plurality of mixer stages, each mixer stage associated with a particular range of frequencies of a radio frequency signal; and a switching circuit operable to communicate the radio frequency signal to a selected one of the plurality of mixer stages in response to a control signal; the selected mixer stage comprising: a phase generation circuit operable to generate a plurality of phase signals; a first mixer operable to combine the radio frequency signal weighted according to a first weighting factor with a first phase signal to generate a first output; a second mixer operable to combine the radio frequency signal weighted according to a second weighting factor with a second phase signal to generate a second output; a third mixer operable to combine the radio frequency signal weighted according to a third weighting factor with a third phase signal to generate a third output; a fourth mixer operable to combine the radio frequency signal weighted according to a fourth weighting factor with a fourth phase signal to generate a fourth output; and a summing circuit operable to combine the first, second, third, and fourth outputs to generate at least a portion of the intermediate frequency signal; wherein: the radio frequency signal comprises a bandwidth approximately ranging from 48 MHz to 852 MHz; and the radio frequency signal comprises a signal of interest approximately ranging from 212 MHz to 424 MHz.