RADIO FREQUENCY SYSTEM SWITCHING POWER AMPLIFIER SYSTEMS AND METHODS

摘要

Systems and method for improving operation of a radio frequency system are provided. One embodiment describes a radio frequency system, which includes a first switching power amplifier that outputs an amplified analog electrical signal based on a first input analog electrical signal and voltage of an envelope voltage supply rail. The first switching power amplifier includes a first transistor with a gate that receives the first input analog electrical signal, a source that is electrically coupled to the envelope voltage supply rail, and a drain that is electrically coupled to an output of the first switching power amplifier; a second transistor with a gate that receives the first input analog electrical signal, a source electrically coupled to ground, and a drain electrically coupled to the output of the first switching power amplifier; and a third transistor with a gate that receives the first input analog electrical signal, a drain electrically coupled to the envelope voltage supply rail, and a source electrically coupled to an output of a second switching power amplifier.

主权项

1. A radio frequency system configured to facilitate wireless communication between electronic devices, wherein the radio frequency system comprises:
a first switching power amplifier configured to output a first amplified analog electrical signal to be transmitted at a desired output power based at least in part on a first input analog electrical signal and an envelope voltage of an envelope voltage supply rail, wherein the first switching power amplifier comprises:
a first transistor, wherein a gate of the first transistor is configured to receive the first input analog electrical signal, a source of the first transistor is configured to be electrically coupled to the envelope voltage supply rail, and a drain of the first transistor is electrically coupled to a first output of the first switching power amplifier;a second transistor coupled in parallel with the first transistor, wherein a gate of the second transistor is configured to receive the first input analog electrical signal, a source of the second transistor is configured to be electrically coupled to ground, and a drain of the second transistor is electrically coupled to the first output of the first switching power amplifier; anda third transistor, wherein a gate of the third transistor is configured to receive the first input analog electrical signal, a drain of the third transistor is configured to be electrically coupled to the envelope voltage supply rail, and a source of the third transistor is electrically coupled to a second output of a second switching power amplifier.