Method and arrangement for noise rejection in a receiver circuit
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United States of America Patent
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Jun 26, 2007
Grant Date -
Sep 11, 2003
app pub date -
Aug 3, 2001
filing date -
Aug 8, 2000
priority date (Note) -
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Abstract
In a method for interference suppression using a quality-adjustable bandpass filter in a receiver circuit for carrier-modulated received signals (S.sub.IN), the bandpass filtered received signal (B.sub.out) is demodulated, and a switching process is triggered with the demodulated received signal (D.sub.out). 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.
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