Phase-locked loop device for reducing frequency locking time and implementation method

Abstract

The invention discloses a phase-locked loop device capable of reducing frequency locking time, which comprises a phase discriminator unit, a frequency division unit, a feedback signal frequency division unit, a loop low-pass filter, a voltage-controlled oscillator, a feedback amplifier, a micro-processing unit, and a charging control unit and a discharging control unit connected with the micro-processing unit, wherein the micro-processing unit is used for controlling the charging control unit or the discharging control unit to carry out charging and discharging operation on the loop low-pass filter during frequency switching so as to realize rapid locking. The invention further discloses a corresponding implementation method. By implementing the method disclosed in the invention, the voltage change time of the phase discrimination voltage during frequency hopping or time slot switching can be reduced, so that the frequency locking time is reduced, and meanwhile, the professional application requirement of high-phase noise is met.

Description

technical field [0001] The present invention relates to the technical field of phase-locked loops, in particular to a phase-locked loop device and an implementation method applied in TDMA (time-division multiplexing addressing) or fast frequency-hopping communication systems to reduce frequency locking time. Background technique [0002] With the rapid development of wireless communication technology, the requirements for the utilization of radio frequency channel resources are getting higher and higher, and channel resources are becoming more and more tight. At the same time, high-performance radio frequency signals in professional applications require high phase noise requirements, and The locking time of the high-performance phase-locked loop of the existing frequency hopping and TDMA radio frequency systems is relatively long, generally above 3ms, and the channel or time slot switching time has not been greatly improved, so the channel utilization rate cannot be improved....

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of wireless communication technology, the requirements for the utilization of radio frequency channel resources are getting higher and higher, and channel resources are becoming more and more tense. At the same time, high-performance radio frequency signals in professional applications also have high requirements for phase noise. The locking time of the high-performance phase-locked loop of the existing frequency hopping and TDMA radio frequency systems is relatively long, generally above 3ms, and the channel or time slot switching time has not been greatly improved, so the channel utilization rate cannot be improved. improve

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