Phase locked frequency synthesizer with single input gain...

Details Phase locked frequency synthesizer with single input gain... Phase locked frequency synthesizer with single input gain...

H - Electricity

03

C

332/36

H03C 3/00 (2006.01) H03C 3/09 (2006.01)

Patent

CA 1310379

45MR-00568 PHASE LOCKED FREQUENCY SYNTHESIZER WITH SINGLE INPUT GAIN COMPENSATED WIDEBAND MODULATION SYSTEM ABSTRACT Several embodiments are disclosed of a modulation equalization network associated with a phase locked loop to achieve frequency independent modulation of the VCO. The equalization network is disposed to introduce the modulation signal into the control loop ahead of the loop filter but after the phase detector output. The interposed equalization network requires only a single input port to achieve a flat modulation response thereby lending itself to a modular implementation. The modulation processing is performed totally outside the phase locked loop. The network serves to provide a boost to low frequency signals from the modulation source using an integrator network while providing a high frequency response that is essentially the inverse of the phase locked loop filter response.

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