PA bias power supply efficiency optimization
First Claim
1. A method comprising:
- determining if a direct current (DC) power supply voltage is adequate to allow power amplifier (PA) bias circuitry to provide a minimum output regulation voltage;
if the DC power supply voltage is adequate, selecting a bias supply bypass operating mode of a charge pump of a PA bias power supply; and
if the DC power supply voltage is not adequate, selecting a bias supply pump-up operating mode of the charge pump.
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Accused Products
Abstract
A charge pump of a PA bias power supply, PA bias circuitry, and a process to optimize efficiency of the PA bias power supply are disclosed. The charge pump operates in one of multiple bias supply pump operating modes, which include at least a bias supply pump-up operating mode and a bias supply bypass operating mode. The process prevents selection of the bias supply bypass operating mode unless a DC power supply voltage is adequate to allow the PA bias circuitry to provide minimum output regulation voltage at a specified current. Otherwise, the bias supply pump-up operating mode is selected. The charge pump operates more efficiently in the bias supply bypass operating mode than in the bias supply pump-up operating mode; therefore, selection of the bias supply bypass operating mode, when possible, increases efficiency.
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Citations
22 Claims
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1. A method comprising:
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determining if a direct current (DC) power supply voltage is adequate to allow power amplifier (PA) bias circuitry to provide a minimum output regulation voltage; if the DC power supply voltage is adequate, selecting a bias supply bypass operating mode of a charge pump of a PA bias power supply; and if the DC power supply voltage is not adequate, selecting a bias supply pump-up operating mode of the charge pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Circuitry comprising:
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a power amplifier (PA) bias power supply; PA bias circuitry; and control circuitry adapted to; determine if a direct current (DC) power supply voltage is adequate to allow the PA bias circuitry to provide a minimum output regulation voltage; if the DC power supply voltage is adequate, select a bias supply bypass operating mode of a charge pump of the PA bias power supply; and if the DC power supply voltage is not adequate, select a bias supply pump-up operating mode of the charge pump. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification