Receiver circuit, in particular for a mobile radio

US7336717B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Markus Hammes · Dinslaken, DE
• Stefan Heinen · Krefeld, DE
• Stefan Van Waasen · Kolbermoor, DE
• Andre Hanke · Mülheim an der Ruhr, DE
• Sonke Mehrgardt · March, DE
• Elmar Wagner · Taufkirchen, DE

Key dates

• Filing date: Mar 10, 2003
• Grant date: Feb 26, 2008
• Expiry date: Jun 28, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03D1/2245
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A radio receiver with a low intermediate frequency has a first mixer stage that can be fed with a modulated input signal and at whose output a complex intermediate frequency signal can be derived. Connected downstream of the first mixer stage is a limiting amplifier at whose output the intermediate frequency signal is present in a discrete-value and continuous-time fashion. A sampling device, for sampling the intermediate frequency signal, and a digital demodulator unit are connected to the output of this limiter. The demodulated input signal can be derived at the output of this digital demodulator unit. The present radio receiver requires a low chip area in conjunction with low power consumption, but offers a high sensitivity and accuracy based on the digitally implemented demodulation.