Patent ID: 9667210
Date: 2017-05-30
CPC Classifications: G05F,H01L,H02M,H03F,H03G,H03H,H03K,H04B

Claim:
1. An apparatus comprising: a low dropout regulator configured to receive a reference voltage and to generate a regulated voltage based at least in part on a comparison of the reference voltage with a feedback signal generated based on the regulated voltage; and a variable voltage distribution circuit in communication with an output of the low dropout regulator, the variable voltage distribution circuit including variable voltage control elements configured to generate at least first and second variable regulated voltages by selectively varying the regulated voltage such that the first variable regulated voltage is provided to bias an input of a power amplifier stage at a first voltage level in a first power mode and the second variable regulated voltage is provided to bias an input of a different power amplifier stage at a second voltage level in a second power mode, and the first voltage level being different than the second voltage level, the variable voltage distribution circuit including distribution elements included in a feedback loop in which the feedback signal is generated, the distribution elements configured to selectively pass the regulated voltage to a first of the variable voltage control elements during the first power mode and to selectively pass the regulated voltage to a second of the variable voltage control elements during the second power mode.