A calibration device for a phase locked loop arranged to generate an output frequency based upon a first frequency range of an input signal applied to a first input and a second frequency range of the input signal applied to a second input, the calibration phase locked loop synthesizer device comprising...http://www.google.de/patents/US20050151595?utm_source=gb-gplus-sharePatent US20050151595 - Calibration device for a phased locked loop synthesiser
