Phase-locked loop circuit, clock generator and electronic equipment

Abstract

The invention discloses a phase-locked loop circuit, a clock generator and electronic equipment. The phase-locked loop circuit comprises a voltage-controlled oscillator, a frequency locking module and a phase locking module, the frequency locking module is used for locking the signal frequency output by the voltage-controlled oscillator to a target frequency according to an input reference clock to form a first signal; the phase locking module is connected with the frequency locking module and the voltage-controlled oscillator and used for outputting a phase comparison result according to the phase of the reference clock and the phase of a second signal, and the second signal is formed after frequency division of the first signal; and the frequency locking module is also used for adjusting the frequency dividing ratio of the first signal according to the phase comparison result so as to keep the phases of the second signal and the reference clock consistent. The phase of the second signal and the phase of the reference clock are kept consistent through the frequency locking module and the phase locking module, so that the initial phase error input by the phase locking module is close to zero during closed loop, rapid locking of the phase-locked loop circuit is achieved, and the data communication speed is increased.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to a phase-locked loop circuit, a clock generator and electronic equipment. Background technique [0002] The phase-locked loop circuit is a very important module in the field of signal processing, especially in the field of clock signal processing. The clock chip based on the phase-locked loop circuit is widely used in the communication industry, data center industry, automobile industry and consumer electronics industry. In addition, the phase-locked loop circuit is also used as a key module, which is integrated in integrated circuit systems such as analog-to-digital converters, serial transceivers, radio frequency transceivers, and controllers. [0003] In the phase-locking process of the existing phase-locked loop circuit, to achieve the locking frequency accuracy, the convergence time is long, which affects data communication. Contents of the invention [0004]...

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Problems solved by technology

[0004] In view of this, the present application provides a phase-locked loop circuit, a clock generator and electronic equipment to solve the problem that the existing phase-locked loop circuit needs to achieve the locking frequency accuracy during the phase-locking process, and the convergence time is long, which affects data communication. question

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