Patent ID: 7792510
Filing Date: 2010-09-07
Classification: H04B

Abstract:
1. A method for operating a multi-band frequency synthesizer, comprising the following steps: providing an oscillator signal with a constant reference frequency; converting the oscillator signal into a first carrier signal with a frequency in the range of a first frequency band; converting said oscillator signal into a second carrier signal with a frequency in the range of a second frequency band; transforming said oscillator signal into an auxiliary signal with a fixed intermediate frequency; and alternately switching between one and the other of the following: 1) dividing the intermediate frequency of said auxiliary signal by a first integer coefficient to generate a down-scaled auxiliary signal and combining the down-scaled auxiliary signal with the second carrier signal to generate third and fourth carrier signals with frequencies in the ranges of different respective third and fourth frequency bands; and 2) dividing the intermediate frequency of the auxiliary signal by a second integer coefficient that is different than the first integer coefficient to generate a fifth carrier signal with a frequency in the range of a fifth frequency band.