| 摘要 |
PURPOSE: A secondary IF filter of a tuner is provided to improve the performance of an adjacent channel disturbance ratio by installing a plurality of trap circuits and removing a high frequency signal of an analog broadcasting. CONSTITUTION: A secondary IF circuit(300) has a plurality of trap circuits(310) to be installed in an output terminal of a secondary mixer for filtering a frequency band signal with a certain region outputted from the secondary mixer, and a filter circuit(320) for passing only a frequency band signal with a certain region among IF signals outputted through the trap circuits(310).
|
