Patent ID: 7236541

Claim:
A translation loop modulator for a transmission circuit in a communication system having a first mode of operation at a first frequency and a second mode of operation at a second frequency, said translation loop modulator comprising: input modulation means for receiving at least one input signal that is representative of information to be modulated, for receiving a feedback signal, and for producing an intermediate modulated signal responsive to said input signal and said feedback signal; comparator means for receiving said intermediate modulated signal and a reference signal having a frequency of F LO , and for producing an output transmission signal having a frequency F OUT responsive to said intermediate modulated signal, wherein said comparator means includes a first frequency divider unit for providing a divide by m function and a second frequency divider unit for providing a divide by n function such that F LO =F OUT /(1+m/n) in said first mode of operation and F LO =F OUT /(1−m/n) in said second mode of operation; and feedback circuitry coupled to said output transmission signal, coupled to said reference signal and coupled to said input modulation means, said feedback circuitry for producing said feedback signal responsive to said output transmission signal and said reference signal.