Patent ID: 7512385
Filing Date: 2009-03-31
Classification: G01S

Abstract:
1. A method for synthesizing a plurality of oscillator signals in a GPS RF Front End integrated within a wireless mobile, comprising the steps of: producing a Local Oscillator (LO) signal with a Voltage Controlled Oscillator (VCO); dividing the LO signal by a predetermined value of a first counter means that is coupled to the VCO to obtain a second signal with a frequency of LO divided by the predetermined value and results in a second signal; dividing the LO signal by a second predetermined value generated by a second fixed counter means that result in a third signal, where the second fixed counter means has a first divide-by-N counter having multiple outputs; dividing one of the first divide-by-N outputs by a second divide-by-N counter; and comparing a phase and a frequency of the outputs of a first programmable count-down counter that is coupled to the second divide-by-N counter and the second programmable count-down counter, with a Phase Frequency Signal Detector where a reference frequency is also coupled to the second programmable count-down counter.