Patent ID: 7340230

Claim:
A receiver for tuning a channel within a signal spectrum, comprising: local oscillator (LO) circuitry having a channel selection signal as an input and having a coarse-tune analog mixing signal as an output, the output mixing signal being selected from a plurality of predetermined output mixing signals depending upon a desired channel to be tuned; analog coarse tune circuitry having the coarse-tune analog mixing signal as an input and having a signal spectrum as an input, the signal spectrum including a plurality of channels within a frequency range, and the analog coarse tune circuitry being configured to use the coarse-tune analog mixing signal to output a coarsely tuned signal spectrum such that the desired channel within the coarsely tuned signal spectrum is mixed down to a variable location within a frequency range around DC, the variable location being dependent upon the desired channel and the selected coarse-tune analog mixing signal; and digital fine tune circuitry having the coarsely tuned signal spectrum as an input and having as an output digital baseband signals for the desired channel; wherein the LO circuitry comprises phase-lock-loop (PLL) circuitry including a phase detector and a controlled oscillator, the phase detector receiving a first signal representative of a reference frequency, receiving a second signal representative of an output frequency of the controlled oscillator, and generating at least one control signal to adjust the output frequency of the controlled oscillator; and wherein the LO circuitry further comprises control circuitry configured to receive a channel selection signal and to control divider circuitry that provides the first and second signals to the phase detector based upon divided versions of the reference frequency and the output of the controlled oscillator, the control circuitry acting to select the coarse-tune analog mixing signal output by the PLL circuitry.