| 摘要 |
A receiver capable of stabilizing its multipass removal filter and thus ensuring an acceptable reception performance, without being affected by a change in the reception sensitivity or the like. The receiver comprises a front end unit for outputting an intermediate frequency signal by mixing/detecting, in accordance with a local oscillation signal, a high frequency received signal received by a reception antenna, an A/D converter for converting an intermediate frequency signal into a digital intermediate frequency signal and outputting the same, an amplitude adjuster for adjusting the amplitude of the digital intermediate frequency signal to a predetermined value and outputting the same, and a multipass removal filter for removing a multipass distortion of a signal outputted from the amplitude adjuster and then outputting a desired signal. The receiver also includes an amplitude supervisor which operates to supervise a change of the above outputted signal, and changes an adjusting period tau of the amplitude adjuster once the change of the above outputted signal exceeds a predetermined value. The receiver further includes a controller which, during an automatic tuning (selection of broadcasting stations), fixes the tap coefficient of the multipass removal filter.
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