Patent ID: 7502435

Claim:
A two-point modulator arrangement, comprising: a phase comparator comprising two inputs, wherein a first input is connected to a reference frequency input, and comprising an output coupled to an input of a controlled oscillator; a frequency divider comprising an adjustable division ratio associated therewith coupled to an output of the controlled oscillator to a second input of the phase comparator; a digital signal processor comprising a clock input coupled to the reference frequency input through a frequency generation block, the digital signal processor further comprising an output providing digital modulation data that is used for modulation at the input of the controlled oscillator; and a digital filter configured to couple the output of the digital signal processor to a control input of the frequency divider, and comprises a clock input that is coupled to an output of the frequency generation block; a sigma-delta modulator coupled between the control input of the frequency divider and the digital filter, wherein the sigma-delta modulator comprises a clock input that is coupled to the reference frequency input of the modulator arrangement; and a synchronization unit coupled between an output of the digital filter and an input of the sigma-delta modulator.