Patent · US Expired

Phase locked loop clock synchronizer and signal detector

US4837781A · kind A · utility

20Cited by
3References
4Claims
0Family size

Assignee

Inventor

Key dates

Filing dateApr 7, 1987
Grant dateJun 6, 1989
Priority date
Expiry dateApr 7, 2007

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04L7/0087
  • WIPO fieldDigital communication
  • WIPO sectorElectrical engineering

Abstract

A phase locked loop system is described for synchronizaing a clock signal to an incoming digital signal and simultaneously detecting that digital signal. The loop is capable of unaided frequency acquisition, hence eliminating the need for special circuits to "pull" the loop into lock when the incoming data rate differs from the initial frequency of the VCO.

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