FM receiver
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United States of America Patent
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-
Feb 15, 1994
Grant Date -
N/A
app pub date -
Oct 30, 1990
filing date -
May 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An FM receiver includes an IF unit followed by an LF unit, the IF unit having an IF filter arrangement. The center frequency of the IF filter arrangement, which is relatively narrowbanded with respect to the channel bandwidth, is controlled as a function of the receiving conditions. The receiver has circuitry for changing the signal transmission characteristic of the IF and/or LF unit, including a detector module for detecting the reception quality, a signal processing unit which receives signals from the signal detector module and which changes the frequency, amplitude or the time values thereof in order to create signals characterizing particular receiving and interference states, and a signal output unit for generating control signals that are supplied to the IF and LF units, the signal output unit including a signal linkage unit to generate the control signals by way of logic and/or time dependent linkage of the signals from the signal processing unit.
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