Patent ID: 7609096
Filing Date: 2009-10-27
Classification: G06F,H03B,H03L

Abstract:
1. A frequency synthesizer having a reference frequency as an input signal and an output frequency as an output signal, the frequency synthesizer comprising: an N1 counter for dividing said reference frequency by a number of N1, and delivering an enable signal; an N2 counter for receiving said enable signal, dividing said output frequency by a number of N2 when said enable signal is active, and delivering a digital output data; a processor for receiving said output data of said N2 counter and delivering a digital output data; a digital to analog converter (DAC) for receiving and converting said output data of said processor and delivering an analog output signal; and a voltage control oscillator (VCO) for receiving said output signal of said DAC and delivering said output frequency; wherein said DAC comprises a DAC register for storing said output data of said processor for said DAC to generate said output signal.