Patent ID: 7324789

Claim:
A frequency synthesizer for use in a transceiver, comprising: a digital processor operable to generate a digital reference signal, the digital processor capable of generating the digital reference signal as a finely-tuned reference frequency, the digital processor including a phase accumulator operably coupled to receive a fine-tune frequency value and operable to generate a phase signal corresponding to the fine-tune frequency value and a modulator operably coupled to receive the phase signal and operable to modulate the phase signal to produce a complex digital signal from which the digital reference signal is produced; a Digital-to-Analog Converter (DAC) operably coupled to receive the digital reference signal and operable to convert the digital reference signal to an analog reference signal; a low pass filter operably coupled to receive the analog reference signal and operable to filter the analog reference signal to produce a filtered analog reference signal; and a phase locked loop operably coupled to receive the filtered analog reference signal to up-convert the filtered analog reference signal from an IF signal to an RF signal.