Patent ID: 6420916
Filing Date: 2002-07-16
Classification: H03J,H03L

Abstract:
A high frequency signal source comprising:a voltage controlled oscillator for providing a high frequency source signal; a divider coupled to the voltage controlled oscillator and receiving the source signal, the divider providing a divided high frequency signal; and a phase locked filter including: a first signal splitter having a source input, a first output, and a second output the source input being coupled to the divider to receive the divided high frequency signal; a band pass filter having a signal input, a signal output, and a control input, the signal input being coupled to the first output, the band pass filter having a frequency response in accordance with a control signal at the control input; a second signal splitter having a filter input, a third output, and a fourth output, the filter input being coupled to the signal output; and a phase control circuit having a first phase input, a second phase input, and a phase output, the first phase input being coupled to the second output, the second phase input being coupled to the third output, the phase output being coupled to the control input.