公开(公告)号：US06838912B1

公开(公告)日：2005-01-04

申请号：US10609535

申请日：2003-07-01

Applicant: Yu-Pin Chou

Inventor： Yu-Pin Chou

IPC: H03D13/00

CPC classification number: H03D13/003

Abstract: A digital fractional phase detector is shown that uses a phase error detector for generating a phase error signal based on the phase difference between a reference clock signal and a feedback clock signal. A quantizer directly measures the pulse width of a phase error signal and outputs the value in a digital form. By directly measuring the phase error signal, quantization accuracy is increased. In order to calibrate the digital fractional phase detector, a calibration pulse generator generates a calibration pulse of a known duration and passes it to the quantizer.

Abstract translation: 示出了一种数字分数相位检测器，其使用相位误差检测器基于参考时钟信号和反馈时钟信号之间的相位差产生相位误差信号。 量化器直接测量相位误差信号的脉冲宽度，并以数字形式输出该值。 通过直接测量相位误差信号，量化精度提高。 为了校准数字分数相位检测器，校准脉冲发生器产生已知持续时间的校准脉冲并将其传递给量化器。