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US 8,299,855 B2Granted
Power amplification systems and methods
AssigneeSkyworks Solutions, Inc.
InventorsJames P. Young, Ying Shi
Life of this patent
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Abstract
A power amplifier system includes a power amplifier element that provides a power output signal in response to a bias signal, and a voltage converter. The voltage converter provides at least one discrete voltage output level to the power amplifier element, where the discrete voltage output level is used to develop the bias signal.
Claims9
A power amplifier system, comprising:
- a power amplifier element configured to provide a power output signal in response to a bias signal;
- a voltage converter configured to provide at least one discrete voltage output level to the power amplifier element, the bias signal supplied to the power amplifier element being responsive to the discrete voltage output level, the voltage converter including a plurality of capacitors and corresponding first switch elements, the capacitors coupled in series and arranged to each charge to a voltage level during a first clock period;
- and
- a bias voltage determination element configured to provide the bias signal to the power amplifier element.
1 more element
Dependencies are inferred from the claim text.