Power amplification device and transmitter

摘要

A power amplification device includes: a first power-amplifier array including a plurality of first switching elements that constitute a class-D power amplifier for a higher bits; a second power-amplifier array including a plurality of second switching elements that constitute a class-D power amplifier for a lower bits; and a capacitor array including a plurality of capacitance elements. The second switching elements have a larger on-resistance than the first switching elements. The first power-amplifier array is arranged between the second power-amplifier array and the capacitor array.

主权项

1. A power amplification device comprising:
a first power-amplifier array including a plurality of first switching elements that constitute a plurality of class-D power amplifiers for a plurality of most significant bits respectively; a second power-amplifier array including a plurality of second switching elements that constitute a plurality of class-D power amplifiers for a plurality of least significant bits respectively, the plurality of second switching elements having a larger on-resistance than the plurality of first switching elements; and a capacitor array including a plurality of capacitors that include a plurality of first capacitors that are connected to the plurality of first switching elements respectively and are driven when the plurality of first switching elements are turned on and a plurality of second capacitors that are connected to the plurality of second switching elements respectively and are driven when the plurality of second switching elements are turned on, wherein the first power-amplifier array is arranged between the second power-amplifier array and the capacitor array.