| 摘要 |
<p>A power switching device in a mobile communications terminal capable of switching a supply power of a power amplifier module having a simple structure and operating at high speed, the power switching device comprising: a voltage regulator for supplying a voltage, which is used for transmitting a radio signal at normal output power, to the power amplifier module; a smoothing unit for smoothing an output voltage of the voltage regulator; a diode for preventing a leakage of reverse voltage generated from an input terminal of the power amplifier module; a load switch connected in parallel to an input terminal of the diode, for switching a battery voltage into the power amplifier module when transmitting a radio signal at normal output power; and a power decoupling unit for removing noise from the battery voltage inputted to the load switch.</p> |
