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GAIN COMPENSATED FRACTIONAL-N PHASE LOCK LOOP SYSTEM AND METHOD
GAIN COMPENSATED FRACTIONAL-N PHASE LOCK LOOP SYSTEM AND METHOD
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机译:增益补偿的分数阶n相锁相环系统和方法
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摘要
A gain compensation technique for a fractional-N phase lock loop includes locking a reference signal with the N divider feedback signal in a phase lock loop including a phase detector, charge pump, loop filter and voltage control oscillator with an N divider in its feedback loop; driving the N divider with a sigma delta modulator including at least one integrator to obtain a predetermined fractional-N feedback signal; and commanding a scaling in phase lock loop gain by a predetermined factor and synchronously inversely scaling by that factor the contents of at least one of the integrators.
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