Transceiver with bidirectional internal interface lines

US6768770B1 · kind B1 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Georg Lipperer · Hersbruck, DE
• Peter Sehrig · Pocking, DE
• Josef Schmal · Hersbruck, DE

Key dates

• Filing date: Apr 21, 2000
• Grant date: Jul 27, 2004
• Expiry date: Apr 21, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/44
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A transceiver has bidirectional internal interface lines which can be connected to a baseband circuit. The transceiver is switchable by the baseband circuit between a transmission mode and a reception mode. The internal interface lines are connected to at least one quadrature modulator which in the transmission mode is connected to the interface lines, and to a quadrature demodulator which in the reception mode is connected to the interface lines. In the alternative, the demodulator is set to high impedance in the transmission mode and the modulator is set to high impedance in the reception mode.