Patent · US Expired

Step controlled signal generator

US5371480A · kind A · utility

9Cited by

12References

29Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Bo Hedberg · Sollentuna, SE
Peter Petersson · Järfälla, SE

Key dates

Filing date	Dec 4, 1992
Grant date	Dec 6, 1994
Priority date	—
Expiry date	Dec 4, 2012

Classification

Technology area (CPC H)Electricity
CPC primaryH03L7/1972
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A phase locked loop frequency synthesizer in which the output frequency is changed in a series of steps in order to reach a final frequency value. The steps are computed and stored in a memory in a control unit. The steps are chosen to approximately cancel the poles of the transfer function of the synthesizer. The phase locked loop provides increased switching speed.

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