Variable-loss transmitter and method of operation
First Claim
1. A transmitter for communicating information, the transmitter comprising:
- a power amplifier configured to receive a source signal and generate an amplified output signal;
an antenna coupled to the power amplifier, the antenna configured to radiate the amplified output signal;
a controller coupled to the power amplifier, the controller configured to control an effective gain of the power amplifier responsive to a power level of operation of the transmitter, the power amplifier having a first effective gain during a low power operation of the transmitter and a second effective gain during a high power operation of the transmitter, the first effective gain being less than the second effective gain.
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Accused Products
Abstract
An exemplary transceiver comprises a power amplifier configured to receive a source signal and generate an amplified output signal, an antenna coupled to the power amplifier, the antenna being configured to radiate the amplified output signal, and a controller coupled to the power amplifier. The controller is configured to control an effective gain of the power amplifier based on a power level of operation of the transmitter. A source amplifier configured to operate on the source signal prior to power amplification is also controlled by the controller. The controller configures the gain level of the source amplifier based on the power level of operation of the transmitter and the effective gain of the power amplifier to improve signal-to-noise ratio.
110 Citations
23 Claims
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1. A transmitter for communicating information, the transmitter comprising:
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a power amplifier configured to receive a source signal and generate an amplified output signal;
an antenna coupled to the power amplifier, the antenna configured to radiate the amplified output signal;
a controller coupled to the power amplifier, the controller configured to control an effective gain of the power amplifier responsive to a power level of operation of the transmitter, the power amplifier having a first effective gain during a low power operation of the transmitter and a second effective gain during a high power operation of the transmitter, the first effective gain being less than the second effective gain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for transmitting a source signal for wireless communication by a transmitter, the transmitter including a power amplifier coupled to an antenna, the method comprising:
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receiving the source signal;
determining a power level of operation of the transmitter;
configuring the power amplifier to have a first effective gain during a low power operation of the transmitter;
configuring the power amplifier to have a second effective gain during a high power operation of the transmitter, the first effective gain being less than the second effective gain;
amplifying, by the power amplifier, the source signal into an amplified output signal;
transmitting the amplified output signal via the antenna. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23)
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17. A wireless communication device comprising:
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a housing;
a transceiver situated in the housing, the transceiver coupled to an antenna for transmitting and receiving radio frequency signals in a plurality of frequency bands;
a mobile power source supplying power to the transceiver, the transcevier comprising;
a power amplifier configured to receive a source signal and generate an amplified output signal, the power amplifier being coupled to the antenna, the antenna configured to radiate the amplified output signal, a controller coupled to the power amplifier, the controller configured to control an effective gain of the power amplifier responsive to a power level of operation of the transceiver, the power amplifier having a first effective gain during a low power operation of the transceiver and a second effective gain during a high power operation of the transceiver, the first effective gain being less than the second effective gain. - View Dependent Claims (18)
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Specification