Patent ID: 7447491

Claim:
A multiple tuner integrated circuit, comprising: at least two tuners integrated on a single integrated circuit with each tuner configured to have a channel signal spectrum as an input, the two tuners comprising: first receive path circuitry, comprising: a first local oscillator (LO) having a first output oscillation signal at a first frequency, the first frequency representing a multiple or divisor of a frequency for a first mixing signal; circuitry configured to process the first output oscillation signal and provide the first mixing signal; mixer circuitry configured to mix an input channel signal spectrum with the first mixing signal; and second receive path circuitry, comprising: a second local oscillator (LO) having a second output oscillation signal at a second frequency, the second frequency representing a multiple or divisor of a frequency for a second mixing signal and the second frequency being selected as to reduce interference with the first frequency; circuitry configured to process the second output oscillation signal and provide the second mixing signal; and mixer circuitry configured to mix an input channel signal spectrum with the second mixing signal; wherein the first LO has an output oscillation signal that is Y times the frequency for the first mixing signal and the second LO has an output oscillation signal that is the frequency for the second mixing signal divided by Z, such that the first mixing frequency is lower in frequency than the first output oscillation signal, and such that the second mixing frequency is higher in frequency than the second output oscillation signal.