Unlock instant, AI-driven research and patent intelligence for your innovation.

A Phase Locked Loop Lock Detection Circuit Based on Time-to-Voltage Converter

A technology of voltage converter and lock detection, which is applied in the direction of electrical components and automatic power control, etc., and can solve problems such as complex structure and poor real-time performance

Active Publication Date: 2021-03-09
UNIV OF SCI & TECH OF CHINA
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the counter-based lock detection circuit is that it is composed of digital circuits, which is easy to integrate, but its structure is complex and the frequency comparison period is long - N*Tref, and the real-time performance is poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Phase Locked Loop Lock Detection Circuit Based on Time-to-Voltage Converter
  • A Phase Locked Loop Lock Detection Circuit Based on Time-to-Voltage Converter
  • A Phase Locked Loop Lock Detection Circuit Based on Time-to-Voltage Converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] figure 2 A phase-locked loop loop detection circuit based on a time-to-voltage converter provided for an embodiment of the present invention, such as figure 2 As shown, it mainly includes two time-to-voltage converters (Time-to-Voltage, TVC) and a clock-controlled comparator (Clock-Controlled Comparator, CC-COMP). The connection relationship is as follows: the time circuit converters connected in parallel are respectively connected with t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a phase-locked loop locking detection circuit based on a time-to-voltage converter, which includes a time-to-voltage converter and a clocked comparator; the time circuit converters connected in parallel are respectively connected to the clocked comparator, and the clocked comparator outputs To lock the detection result signal; the input terminals of the two time-to-digital converters are respectively connected to the input reference signal and the output signal of the frequency divider, and the output terminals of the two time-to-digital converters are respectively connected to two clocked comparators. The input ports are connected, and the output end of the clocked comparator is the output end of the phase-locked loop lock detector.

Description

technical field [0001] The invention relates to the technical field of radio frequency integrated circuits, in particular to a phase-locked loop lock detection circuit based on a time-to-voltage converter. Background technique [0002] The phase-locked loop circuit is an important circuit module in a wireless communication system, which is used to generate a local oscillator signal with low reference spurious and low phase noise for up-down conversion. The phase-locked loop circuit will go through three states of frequency tracking, phase tracking and locking from the moment of power-on. Among them, the time taken by the phase-locked loop circuit to reach the locked state is its key performance. When the time used to reach the locked state is long, the channel switching speed and data transmission rate are limited. The circuit for detecting whether the phase-locked loop has reached the locked state is a phase-locked loop detection circuit. The current phase-locked loop dete...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/095H03L7/18
CPCH03L7/095H03L7/18
Inventor 席娜林福江叶甜春
Owner UNIV OF SCI & TECH OF CHINA