Phase-Locked Loop Frequency Synthesizers
The indirect or phase-locked loop frequency synthesizer offers the distinct advantage over other types of synthesizers of possible low-cost IC integration. This is the main reason why almost all mobile communication chip sets use this circuit. But of course there are also some disadvantages, which require careful study and proper design. Two main areas of specifications characterize a frequency synthesizer.
KeywordsPhase Noise Phase Detector Reference Frequency Charge Pump Loop Filter
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