Linear amplifier power supply modulation for envelope tracking
First Claim
Patent Images
1. Circuitry comprising:
- a linear amplifier adapted to at least partially provide an envelope power supply signal to a radio frequency (RF) power amplifier (PA) using a selected one of a plurality of linear amplifier supply voltages;
power supply control circuitry adapted to select one of the plurality of linear amplifier supply voltages based on a desired voltage of the envelope power supply signal;
a linear amplifier power supply adapted to provide at least one of the plurality of linear amplifier supply voltages;
a setpoint of the envelope power supply signal is based on the desired voltage of the envelope power supply signal; and
an envelope power supply control signal is representative of the setpoint of the envelope power supply signal.
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Abstract
Circuitry, which includes a linear amplifier and a linear amplifier power supply, is disclosed. The linear amplifier at least partially provides an envelope power supply signal to a radio frequency (RF) power amplifier (PA) using a selected one of a group of linear amplifier supply voltages. The linear amplifier power supply provides at least one of the group of linear amplifier supply voltages. Selection of the selected one of the group of linear amplifier supply voltages is based on a desired voltage of the envelope power supply signal.
289 Citations
30 Claims
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1. Circuitry comprising:
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a linear amplifier adapted to at least partially provide an envelope power supply signal to a radio frequency (RF) power amplifier (PA) using a selected one of a plurality of linear amplifier supply voltages; power supply control circuitry adapted to select one of the plurality of linear amplifier supply voltages based on a desired voltage of the envelope power supply signal; a linear amplifier power supply adapted to provide at least one of the plurality of linear amplifier supply voltages; a setpoint of the envelope power supply signal is based on the desired voltage of the envelope power supply signal; and an envelope power supply control signal is representative of the setpoint of the envelope power supply signal. - View Dependent Claims (2, 3, 4, 5, 6, 28)
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7. Circuitry comprising:
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a linear amplifier adapted to at least partially provide an envelope power supply signal to a radio frequency (RF) power amplifier (PA) using a selected one of a plurality of linear amplifier supply voltages; power supply control circuitry adapted to select one of the plurality of linear amplifier supply voltages based on a desired voltage of the envelope power supply signal; a linear amplifier power supply adapted to provide at least one of the plurality of linear amplifier supply voltages; and the linear amplifier is further adapted to receive a direct current (DC) source signal and a linear amplifier power supply output signal, such that one of the plurality of linear amplifier supply voltages is provided via the DC source signal and a balance of the plurality of linear amplifier supply voltages is provided via the linear amplifier power supply output signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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29. Circuitry wherein a linear amplifier is adapted to at least partially provide an envelope power supply signal to a radio frequency (RF) power amplifier (PA) using a selected one of a plurality of linear amplifier supply voltages and comprising:
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power supply control circuitry adapted to select one of the plurality of linear amplifier supply voltages based on a desired voltage of the envelope power supply signal; a linear amplifier power supply adapted to provide at least one of the plurality of linear amplifier supply voltages; a setpoint of the envelope power supply signal is based on the desired voltage of the envelope power supply signal; and an envelope power supply control signal is representative of the setpoint of the envelope power supply signal.
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30. A method comprising:
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at least partially providing an envelope power supply signal to a radio frequency (RF) power amplifier (PA) using a selected one of a plurality of linear amplifier supply voltages, such that selection of the selected one of the plurality of linear amplifier supply voltages is based on a desired voltage of the envelope power supply signal; and using a linear amplifier power supply to provide at least one of the plurality of linear amplifier supply voltages, such that a setpoint of the envelope power supply signal is based on the desired voltage of the envelope power supply signal and an envelope power supply control signal is representative of the setpoint of the envelope power supply signal.
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Specification