| 摘要 |
<p>The module (21) has two amplifiers (25, 28) in respective two transmission paths (23, 26). The module is provided with a battery (29) for powering the amplifiers. A step up/down DC-DC converter (30) controls the voltage supplied by the battery to the amplifiers. The amplifier (25) is a global system for mobile communication (GSM) power amplifier, where the amplifier (28) is a UMTS power amplifier.</p> |
