| 摘要 |
<p>A wireless communication device (50), such as a dual-mode cellular phone, receives radio frequency (RF) signals in either of two communication bands. Each received RF signal is passed to two bandpass filters (54, 58), one for each communication band, the outputs of which are connected to a single amplifier (56). The amplifier processes the received signal regardless of the communication band in which the signal was received. The amplifier can include two sets of similar circuitry, e.g., matching circuits, one for each communication band, which are selected alternatively to process received signals in the corresponding communication band.</p> |
