Patent · US Expired

Demodulator and method for the demodulation of modulated RF signals

US6803814B1 · kind B1 · utility

17Cited by

3References

16Claims

0Family size

Assignee

Sony International (Europe) GmbH · DE

Inventors

Dragan Krupezevic · Stuttgart, DE
Veselin Brankovic · Eßlingen, DE
Gerald Oberschmidt · Fellbach, DE
Masayoshi Abe · Tokyo, JP
Tino Konschak · Stuttgart, DE
Thomas Dölle · Chemnitz, DE

Key dates

Filing date	Feb 11, 2000
Grant date	Oct 12, 2004
Priority date	—
Expiry date	Feb 11, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH03D2200/0003
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A demodulator for modulated RF signals comprises a passive four port structure (1). The four port structure (1) has a first input (3) for supplying a modulated RF signal to be demodulated. A second input (2) is supplied with a RF signal from a local oscillator (21). Two output terminals are connected to power sensors (4, 5). The RF signal from the local oscillator (21) is supplied to the second input (3) of the four port structure (1) without being RF switched by an RF switch. The demodulator is particularly useful for modulation schemes with a finite number of magnitude states (nQAM modulation).

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