Patent · US Active

Phase locked loop having reduced inherent noise

US7693247B2 · kind B2 · utility

0Cited by

2References

26Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Peter Gregorius · Munich, DE
Martin Streibl · Petershausen, DE
Thomas Rickes · Munich, DE

Key dates

Filing date	Sep 26, 2005
Grant date	Apr 6, 2010
Priority date	—
Expiry date	Nov 23, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH03L7/18
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A phase locked loop having reduced inherent noise is provided. The phase locked loop comprises a controlled oscillator for outputting a periodic output signal as a result of a control signal; a feedback unit for providing at least two periodic feedback signals having a constant phase shift to each other and each depending on the output signal; a phase/frequency detector for providing difference signals each depending on a periodic input signal and at least one of the feedback signals; and a control circuit for providing the control signal to the controlled oscillator depending on the difference signals.

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