Patent ID: 8890635
Filing Date: 2014-11-18
Classification: H03L,H04B

Abstract:
1. A signal generator for a transmitter or a receiver for transmitting or receiving RF-signals according to a given communication protocol, respectively, the signal generator comprising: an oscillator configured to provide a signal generator output signal having a signal generator output frequency, the oscillator comprising a fine tuning circuit configured to provide a fine adjustment of the signal generator output frequency based on a fine tuning signal, and a coarse tuning circuit configured to provide a course adjustment of the signal generator output frequency based on a coarse tuning signal; and a mismatch compensator configured to receive the signal generator output signal and compensate a frequency mismatch between a desired signal generator output frequency and the signal generator output frequency generated by the oscillator by providing the fine tuning signal for changing a state of the fine tuning circuit of the oscillator and by providing the coarse tuning signal for changing a state of the coarse tuning circuit of the oscillator, wherein the mismatch compensator is configured to provide the coarse tuning signal during a guard period defined in the given communication protocol, during which no RF-signals are transmitted by the transmitter or no RF-signals are to be received by the receiver, such that the state of the coarse tuning circuit is changed within the guard period.