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US 2014/0210552 A1Published application
Apparatus and methods for biasing a power amplifier
AssigneeSkyworks Solutions, Inc.
InventorsPing Li, Paul T. DiCarlo
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Abstract
Apparatus and methods for biasing a power amplifier are disclosed. In one embodiment, a method of biasing a power amplifier includes shaping an enable signal using a time-dependent signal generator to generate a control current, amplifying the control current using a current amplifier to generate a correction current, and generating a bias current for a power amplifier using a primary biasing circuit. The primary biasing circuit is configured to use the correction current to correct for a variation in gain of the power amplifier when the power amplifier is enabled.
Claims1
A power amplifier system comprising:
- a power amplifier configured to amplify a radio frequency (RF) signal;
- and
- a bias block for biasing the power amplifier, the bias block including a time-dependent signal generator configured to shape an enable signal of the power amplifier to generate a control current, a current amplifier configured to amplify the control current to generate a correction current, and a primary biasing circuit configured to generate a bias current for the power amplifier based at least partly on the correction current, the bias current configured to correct for a variation in gain of the power amplifier when the power amplifier is enabled.
Dependencies are inferred from the claim text.