A method and device for converting a clock signal into a digital signal in a phase-locked loop

Abstract

The invention is suitable for the field of phase-lock loops, and provides a method and a device for converting clock signals to digital signals in a phase-lock loop. The method comprises the following steps: a digit time converter receives the clock signals output by an oscillator; the digital time converter conducts first time delay for the clock signals through delay control words by the digit time converter; a time digit converter conducts second time delay for the clock signals subjected to the first time delay, and converts the clock signals subjected to the second time delay to the digital signals. According to the device, the clock signals input into the phase-lock loop is subjected to the time delay through the delay control words; the controlling for the accuracy of delay time is realized by presetting the number of the delay control words; the clock signals subjected to the time delay is converted to the digital signals by converting; therefore, the accuracy of the delay control words for the clock signals is allowed to be far more better than the time delay of a bumper, and a circuit of the delay control words is simple, and small in size.

Description

technical field [0001] The invention belongs to the field of phase-locked loops, and in particular relates to a method and a device for converting a clock signal into a digital signal in a phase-locked loop. Background technique [0002] When the phase-locked loop system converts the clock signal into a digital signal, a buffer (such as an inverter) is usually used to delay the clock signal, and the delay accuracy of a single buffer is very low. [0003] The prior art proposes to use a vernier delay chain to delay the clock signal in the phase-locked loop system. Using a delay chain can make the clock signal in the phase-locked loop system achieve any delay accuracy, but it needs to use two delay chains of similar size, which requires a larger circuit area, circuit complexity and greater power. consumption. Contents of the invention [0004] The purpose of the embodiments of the present invention is to provide a method and device for converting a clock signal into a digi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a method and device for converting a clock signal into a digital signal in a phase-locked loop, so as to solve the problems of low delay accuracy and complex delay circuits in the prior art

Images