A method includes a foreground process and a background process. In the foreground process, an input signal is processed using a first reference signal to generate an output. A first frequency control signal is generated from the output. A frequency of the first reference signal is controlled based on...http://www.google.fr/patents/US7817976?utm_source=gb-gplus-shareBrevet US7817976 - System and method for inverting automatic frequency control
System and method for inverting automatic frequency control
