CPC H03F 1/0288 (2013.01) [H03F 3/245 (2013.01); H04B 1/40 (2013.01); H04W 52/52 (2013.01); H03F 2200/105 (2013.01); H03F 2200/451 (2013.01)] | 20 Claims |
1. A mobile device comprising:
a front end system including a carrier amplifier configured to amplify a first radio frequency signal, and a peaking amplifier configured to amplify a second radio frequency signal corresponding to a delayed version of the first radio frequency signal; and
a power management system including an envelope tracker configured to generate a first power supply voltage that powers the carrier amplifier, the envelope tracker operable to control a voltage level of the first power supply voltage to track an envelope of the first radio frequency signal, the power management system further including a delay circuit configured to delay the first power supply voltage to generate a second power supply voltage that powers the peaking amplifier.
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