Phase-locking loop with frequency-control sensitivity compensation ability
A phase-locked loop and loop technology, applied in the automatic control of power, electrical components, etc., can solve problems such as the decrease of the stability of the loop bandwidth value W and the excessive fluctuation range of the loop bandwidth W value
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[0067] see Figure 6 , Figure 6 is a system block diagram of the PLL 30 of the first embodiment of the present invention. The present invention provides a PLL 30 including a phase detector 32 , a loop filter 34 , a gain controller 36 , a VCO 38 and a frequency converter 40 .
[0068] The phase detector 32 is an analog phase detector for receiving a first feedback signal F fb , a reference signal F ref and a gain control signal S gc , output a phase difference signal S p , phase difference signal S p Response to the first feedback signal F fb with reference signal F ref The phase difference between two signals. A phase detector gain value K of the phase detector 32 PD Defined as the phase difference signal S p Ratio to phase difference. Phase detector gain value K PD can be controlled by the gain signal S gc adjusted.
[0069] The implementation of the phase detector 32 is not the focus of the present invention, and will not be discussed in detail here because it...
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