| 摘要 |
The receiver includes an HF tuner (1) and at least two surface acoustic wave filters (2,3) coupled to it. The HF tuner filters a supplied HF signal and converts it to an IF TV signal which is coupled on the surface acoustic wave filters. The HF tuner comprises at least two outputs (6,7) which provide the converted IF signal. Each output is respectively associated with a switch (8,9), and the associated output is switchable on a fixed reference voltage. A respectively first input (10,12) of both surface acoustic wave filters is coupled with a first output (6) of the HF tuner, and a respectively second input (11,13) of the filters with a second output (7) of the HF tuner. One of the outputs of the HF tuner and the corresponding input of the surface acoustic wave filters, is alternatively connected by the switch to the reference voltage, to respectively control filter characteristics of the TV receiver. |
