Patent ID: 8902953

Claim:
An integrated Radio Frequency (RF) transceiver circuit having at least a digital component and at least an analog component, the circuit comprising: a fixed frequency oscillator configured to generate a fixed frequency signal at a frequency f XTAL ; a reference signal generator, coupled to the fixed frequency oscillator, that is configured to provide a reference signal at a reference frequency f REF from division of the fixed frequency signal; a local oscillator signal generator, coupled to the reference signal generator, that is configured to provide a local oscillator signal having a local oscillator signal frequency f LO from multiplication of the reference signal; a RF signal receiver including a mixer configured to combine an input RF signal with the local oscillator signal to produce an intermediate frequency signal; a filter having a filter bandwidth f if bw , the filter connected to an output of the mixer, wherein the reference signal generator is configured to generate the reference signal such that all harmonics of the reference signal lie outside of a selected band defined by the local oscillator signal frequency f LO and the filter bandwidth; and a digital clock signal generator, coupled to the local oscillator signal generator, that is configured to provide a digital clock signal at a digital clock signal frequency f DIG that is a sub-harmonic of the local oscillator signal frequency f LO .