Patent · US Expired

Two-point modulator comprising a PLL circuit and a simplified digital pre-filtering system

US7142063B2 · kind B2 · utility

6Cited by

2References

16Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Christian Grewing · Düsseldorf, DE
Markus Hammes · Dinslaken, DE
Stefan Van Waasen · Kolbermoor, DE

Key dates

Filing date	May 24, 2002
Grant date	Nov 28, 2006
Priority date	—
Expiry date	Dec 6, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH03C3/0941
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A two-point modulator includes a PLL circuit and a simplified digital pre-filtering system. The two-point modulator includes a first circuit path for impressing an analog modulation signal into a first point in the PLL circuit, and a second circuit path for impressing a digital modulation signal into a second point in the PLL circuit. The second circuit path actuates a frequency divider in the feedback path in the PLL circuit and contains a digital filter which has a square-wave pulse response.

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