公开(公告)号：US09379879B1

公开(公告)日：2016-06-28

申请号：US14817129

申请日：2015-08-03

Applicant: Silicon Laboratories Inc.

Inventor： Aaron J. Caffee ,  Brian G. Drost ,  James F. Parker

IPC: H03L7/099 ,  H04L7/00 ,  H04L7/027 ,  G04F10/00

CPC classification number: G04F10/005 ,  H03L7/091 ,  H03L7/23 ,  H03L2207/50

Abstract: A noise-shaping time-to-digital converter has a large range and high resolution. The time-to-digital converter includes a phase detector configured to generate a phase error signal based on a phase-adjusted feedback signal and an input signal. The time-to-digital converter includes a loop filter configured to integrate the phase error signal and generate an analog integrated phase error signal. The time-to-digital converter includes an analog-to-digital converter configured to convert the analog integrated phase error signal to a digital phase error code. The time-to-digital converter includes a digital-to-time converter configured to convert at least a portion of the digital phase error code to a gating signal based on a reference signal and an enable signal. The time-to-digital converter includes a feedback circuit to generate the phase-adjusted feedback signal based on the reference signal and the gating signal.

Abstract translation: 噪声整形时间 - 数字转换器具有大范围和高分辨率。 时间数字转换器包括相位检测器，其被配置为基于相位调整反馈信号和输入信号产生相位误差信号。 该时间 - 数字转换器包括环路滤波器，其被配置为对相位误差信号进行积分并产生模拟积分相位误差信号。 时间 - 数字转换器包括被配置为将模拟积分相位误差信号转换为数字相位误差代码的模拟 - 数字转换器。 时间 - 数字转换器包括数字 - 时间转换器，其被配置为基于参考信号和使能信号将数字相位误差代码的至少一部分转换为门控信号。 该时间 - 数字转换器包括基于参考信号和门控信号产生相位调整反馈信号的反馈电路。