Method and arrangement for noise rejection in a receiver circuit

US7236743B2 · kind B2 · utility

Assignees

• VISHAY SEMICONDUCTOR GMBH · DE
• ATMEL Germany GmbH · DE
• MELEXIS NV · BE

Inventors

• Matthias Eichin · Heilbronn, DE
• Alexander Kurz · Schwäbisch Hall, DE
• Karl-Ulrich Stahl · Erfurt, DE

Key dates

• Filing date: Aug 3, 2001
• Grant date: Jun 26, 2007
• Expiry date: Nov 2, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B10/6972
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In a method for interference suppression using a quality-adjustable bandpass filter in a receiver circuit for carrier-modulated received signals (SIN), the bandpass filtered received signal (Bout) is demodulated, and a switching process is triggered with the demodulated received signal (Dout). In order to eliminate internal or self-induced interferences that would be caused by a switching process in the output portion of the receiver, a quality reduction of the bandpass filter is correlated with the switching process that causes the interference. The method is especially suitable in connection with circuits for infrared receivers, which can thereby be manufactured in a small size, without external components, and thus economically.