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US 8,493,141 B2Granted
Pseudo-envelope following power management system
AssigneeRF Micro Devices, Inc.
InventorsNadim Khlat, Michael R. Kay
Life of this patent
Estimating the term…
Abstract
Embodiments disclosed in the detailed description relate to a pseudo-envelope follower power management system used to manage the power delivered to a linear RF power amplifier.
Claims3
A power management system for an RF power amplifier comprising:
- a parallel amplifier including a supply input configured to receive a direct current input voltage and an amplifier in communication with a power amplifier supply voltage;
- and
- a multi-level charge pump buck converter including a supply input configured to receive the direct current input voltage and a switching voltage output in communication with the power amplifier supply voltage, wherein the multi-level charge pump buck converter is configured to shunt the switching voltage output to ground in a first operational state, provide the direct current input voltage to the switching voltage output in a second operational state, provide 1.5 times the direct current input voltage to the switching voltage output in a third operational state, and provide 2 times the direct current input voltage to the switching voltage output in a fourth operational state.
Dependencies are inferred from the claim text.