Patent ID: 7593695
Filing Date: 2009-09-22
Classification: H03L,H04B

Abstract:
1. A frequency synthesizer for use in a transceiver that is capable of operating as a local oscillation generator in a receiving mode and as a transmitter in a transmitting mode, comprising: a digital processor operable to generate a digital signal, the digital processor capable of generating the digital signal as a modulated digital signal in the transmitting mode, the digital processor further capable of generating the digital signal as a reference digital signal in the receiving mode; a Digital-to-Analog Convener (DAC) operably coupled to receive the digital signal and operable to convert the digital signal to an analog signal; a low pass filter operably coupled to receive the analog signal and operable to filter the analog signal to produce a filtered analog signal; and a phase locked loop operably coupled to receive the filtered analog signal to up-convert the filtered analog signal to an RF signal, the phase locked loop capable of producing the RF signal as a modulated RF signal in the transmitting mode, the phase locked loop further capable of producing the RF signal as a reference RF signal in the receiving mode.