Patent · US Expired

Dual edge-triggered phase detector and phase locked loop using same

US6198355A · kind A · utility

25Cited by

12References

9Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Bjorn Lindquist · Bjärred, SE
Magnus Nilsson · Lund, SE

Key dates

Filing date	Mar 12, 1999
Grant date	Mar 6, 2001
Priority date	—
Expiry date	Mar 12, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH03L7/0898
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

There is disclosed a phase detector which triggers on both rising and falling edges of an input pulse signal. This effectively doubles the frequency of the input signal. When the phase detector is used in a phase locked loop, the doubled frequency means that a lower division ratio can be used, thereby reducing any noise contribution introduced thereby.

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