| 摘要 |
A switching noise cancelling system in a space diversity receiving system, comprising a comparator for comparing two receiving signal levels received by two antennas to provide a high level signal or a low level signal in response to the result of the comparison, a first switch for selecting, in response to the output signal of the comparator, one of two signals received by the antennas, a noise generating unit for generating noises substantially the same as noises generated by the switch, and a noise cancelling unit for cancelling the noises generated by the first switch by using the noises generated by the noise generating unit, whereby noises generated by the switch are canceled.
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