Patent · US Expired

Down converter and demodulator using a three port junction

US6539215B1 · kind B1 · utility

9Cited by

5References

21Claims

0Family size

Assignees

SONY GROUP CORPORATION · JP
Sony International (Europe) GmbH · DE

Inventors

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

Key dates

Filing date	May 25, 2000
Grant date	Mar 25, 2003
Priority date	—
Expiry date	May 25, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH04B1/30
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A down converter for RF signals comprises one three port junction (7) having one input port six for modulated digital RF signals and two output ports (8, 9). The output ports (8, 9) are respectively connected to a power sensor (10, 11). The three port junction (7) comprises a power splitter (16) dividing the signal supply to the input terminal (6) of the two branches, processing means (17, 18, 19, 21, 22, 23, 24) for processing one of the branches and a four port junction device (20) for combining the two branches and for generating two output signals to be supplied to the output terminals (8, 9) of the three port junction (7). The processing means can comprise a delay unit (18) or alternatively a frequency divider (21), a plurality of filters (22, 24) and a frequency multiplicator (23).

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