| 摘要 |
A radio receiver or a filter circuit for an FM radio receiver, the radio receiver or the filter circuit having a first radio frequency (RF) or band pass filter, which may be selectively electrically or operatively connected between an input and a mixer when a tuner is tuned to a first RF range, or which may be for passing a first RF range, and a second RF or band pass filter, which may be selectively electrically connected between the input and the mixer when the tuner is tuned to a second RF range, or which may be for passing a second RF range different from the first RF range. The filter circuit may have a control circuit selectively electrically or operatively connected with the first RF filter and the second RF filter for inserting the first RF filter into a signal path when the FM radio receiver is tuned.
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