Patent ID: 8598950
Filing Date: 2013-12-03
Classification: H03F

Abstract:
1. A mobile device comprising: a plurality of power amplifiers including a first power amplifier configured to amplify a first radio frequency (RF) signal, the first power amplifier having an enabled state and a disabled state; an envelope tracking module configured to generate a supply voltage for a first supply node used to electrically power the plurality of power amplifiers; a first switchable capacitor operatively associated with the first power amplifier and having a first end and a second end, the first end electrically connected to the first supply node; and a first switch operatively associated with the first power amplifier and configured to control a voltage of the second end of the first switchable capacitor, the first switch configured to electrically float the second end of the first switchable capacitor when the first power amplifier is disabled so as to reduce a capacitive loading of the envelope tracking module.