MULTIPLE-STATE, SWITCH-MODE POWER AMPLIFIER SYSTEMS, AND METHODS OF THEIR OPERATION

摘要

PROBLEM TO BE SOLVED: To solve the problem in which amplifiers having relatively high efficiency may have relatively poor performance in terms of linearity, distortion, bandwidth, and so on; and provide an amplifier optimized in both efficiency and performance.SOLUTION: An amplifier comprises N SMPA branches. Each SMPA branch includes drive signal inputs and an SMPA branch output. In response to receiving drive signals at the drive signal inputs, the SMPA branch is configured to produce an SMPA branch output signal at the SMPA branch output. In response to receiving a different combination of the drive signals at the drive signal inputs, the SMPA branch is configured to produce, at the SMPA branch output, the SMPA branch output signal at a different voltage level.