Low impedance adaptive bias scheme for power amplifier
AssigneeQUALCOMM Incorporated
InventorWoonyun KIM
Life of this patent
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Abstract
An adaptive bias circuit for a power amplifier may include a terminal node coupled to the power amplifier. The adaptive bias circuit may also include a low impedance bias circuit coupled to the terminal node. The adaptive bias circuit may further include a high drive bias circuit coupled to the low impedance bias circuit through the terminal node. A separation device may be arranged between the low impedance bias circuit and the high drive bias circuit.
Claims20
An adaptive bias circuit for a power amplifier, comprising:
- a terminal node coupled to the power amplifier;
- a low impedance bias circuit coupled to the terminal node;
- and
- a high drive bias circuit coupled to the low impedance bias circuit through the terminal node.
A method of low impedance, adaptive biasing for a power amplifier (PA), comprising:
- receiving a radio frequency (RF) input signal at the power amplifier, the power amplifier configured to provide an output signal;
- supplying a low current bias signal to the power amplifier when the RF input signal is at a first power level;
- and
- supplying a high drive current bias signal to the power amplifier when the RF input signal is at a second power level.
An adaptive bias circuit for a power amplifier, comprising:
- means for receiving a radio frequency (RF) input signal at the power amplifier, the power amplifier configured to provide an output signal;
- means for supplying a low current bias signal to the power amplifier when the RF input signal is at a first power level;
- and
- means for supplying a high drive current bias signal to the power amplifier when the RF input signal is at a second power level.
Dependencies are inferred from the claim text.