Back to results
US 7,629,843 B2Granted
Parallel power amplifier and associated methods
AssigneeBlack Sand Technologies, Inc.
InventorsSusanne A. Paul, Timothy J. Dupuis
Life of this patent
Estimating the term…
Abstract
A method and apparatus is provided for use in power amplifiers where multiple parallel power amplifiers provide various output power levels. By selectively enabling and disabling the parallel power amplifiers and combining their outputs, a desired output power can be realized, while choosing a combination of power amplifiers that provide a high efficiency.
Claims20
A cellular telephone comprising:
- an antenna for transmitting and receiving RF signals;
- a transceiver coupled to the antenna for generating signals to be transmitted by the antenna;
- and
- an RF power amplifier coupled between the antenna and the transceiver, the RF power amplifier further comprising,
- a first power amplifier that can be selectively enabled and disabled, the first power amplifier having a first transformation network that produces a desired impedance at a load, the first transformation network including an inductor and a capacitor,
- a second parallel power amplifier that can be selectively enabled and disabled, the second power amplifier having a second transformation network that produces a desired impedance at the load, the second transformation network including an inductor and a capacitor, and
- wherein outputs of the first and second power amplifiers are combined to provide an amplified RF signal to the antenna.
4 more elements
An RF power amplifier comprising:
- a first power amplifier, the first power amplifier having a first transformation network that produces a desired impedance at a load, the first transformation network including an inductor and a capacitor;
- a second power amplifier configured parallel to the first power amplifier, the second power amplifier having a second transformation network that produces a desired impedance at the load, the second transformation network including an inductor and a capacitor;
- a third power amplifier configured parallel to the first and second power amplifiers, the third power amplifier having a third transformation network that produces a desired impedance at the load, the third transformation network including an inductor and a capacitor;
- and
- wherein outputs of the first, second, and third power amplifiers are combined to provide an output of the RF power amplifier, and wherein the first, second, and third power amplifiers can be selectively disabled.
2 more elements
Dependencies are inferred from the claim text.