Patent · US Expired

Apparatus and method for ensuring the correct start-up and locking of a delay locked loop

US6239634A · kind A · utility

28Cited by
14References
33Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJan 10, 2000
Grant dateMay 29, 2001
Priority date
Expiry dateJan 10, 2020

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03L2207/14
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

A delay locked loop (DLL) is described comprising: a delay unit configured to delay an input clock signal by a specified amount to produce a delayed clock signal, said specified amount controlled by a control voltage applied to said delay unit; and a switch configured to clamp said control voltage to a predetermined value when said DLL is reset.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.