| 摘要 |
Receiver circuit in which the center frequency of an IF filter (2, 6, 10, 11), the band of which is relatively narrow compared with the width of the channel-band, is compensated for as a function of the modulation, in which said IF filter (2, 6, 10, 11) and/or the LF part (21-26) following a demodulator (14) has a varying characteristic of signal-transmission, of frequency in particular, in which a circuit is provided for modifying the signal transmission characteristic in the IF and/or LF part. Said circuit consists of a signal receiving part (28) for deflecting various signals which are characteristic of the receiving conditions, a signal regeneration part (600) for modifying in time or in amplitude the received signals, a signal combination part for producing output signals by logically or chronologically combining the signals emitted by the signal regeneration part (600) and a signal output part (200, 400) for emitting control signals to individual stages of the IF or LF part following the output signals from the signal combination part, whereby the control signals of at least one of the circuit stages influencing the filter compensation characteristics (17-20) are supplied as input signals.
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