Three port structure with modulated LO signal

US6748203B1 · kind B1 · utility

Assignees

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

Inventors

• Veselin Brankovic · Eßlingen, DE
• Dragan Krupezevic · Stuttgart, DE
• Gerald Oberschmidt · Fellbach, DE
• Tino Konschak · Stuttgart, DE
• Thomas Dölle · Chemnitz, DE
• Hamid Amir-Alikhani · Leonberg, DE
• Masayoshi Abe · Tokyo, JP

Key dates

• Filing date: Sep 28, 2000
• Grant date: Jun 8, 2004
• Expiry date: Feb 14, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L27/38
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A three port structure for the down conversion demodulation of a digitally modulated RF signal is proposed, wherein no RF switches are provided. The three port structure (1) has a first input (2) for the RF signal to be down converted and a second input (3) for a RF signal originating from a local oscillator (8). An output (4) of the three port structure (1) is supplied to a power sensor unit (5). The RF signal from the local oscillator (8) is modulated (7) before it is supplied to the three port structure (1).