Group delay calibration of RF envelope tracking
First Claim
1. An apparatus comprising an RF power amplifier, an envelope tracking power supply, and supply control circuitry;
- and configured to operate in one of a normal operation mode and a calibration mode, such that during the calibration mode;
the RF power amplifier is configured to receive and amplify an RF input signal to provide an RF transmit signal using an envelope power supply signal; and
the supply control circuitry is configured to control the envelope tracking power supply to cause a sharp transition of the envelope power supply signal when a setpoint of the envelope power supply signal transitions through a setpoint threshold of the envelope power supply signal, wherein a maximum rate of change of the envelope power supply signal during the sharp transition is greater than a maximum rate of change of the envelope power supply signal during the normal operation mode.
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Accused Products
Abstract
An RF communications system, which includes an RF power amplifier, an envelope tracking power supply, and supply control circuitry, is disclosed. The RF communications system operates in one of a normal operation mode and a calibration mode. During the calibration mode, the RF power amplifier receives and amplifies an RF input signal to provide an RF transmit signal using an envelope power supply signal, which is provided by the envelope tracking power supply. Further, the supply control circuitry controls the envelope tracking power supply to cause a sharp transition of the envelope power supply signal when a setpoint of the envelope power supply signal transitions through a setpoint threshold of the envelope power supply signal.
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Citations
23 Claims
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1. An apparatus comprising an RF power amplifier, an envelope tracking power supply, and supply control circuitry;
- and configured to operate in one of a normal operation mode and a calibration mode, such that during the calibration mode;
the RF power amplifier is configured to receive and amplify an RF input signal to provide an RF transmit signal using an envelope power supply signal; and the supply control circuitry is configured to control the envelope tracking power supply to cause a sharp transition of the envelope power supply signal when a setpoint of the envelope power supply signal transitions through a setpoint threshold of the envelope power supply signal, wherein a maximum rate of change of the envelope power supply signal during the sharp transition is greater than a maximum rate of change of the envelope power supply signal during the normal operation mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- and configured to operate in one of a normal operation mode and a calibration mode, such that during the calibration mode;
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23. A method comprising:
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providing an RF power amplifier, an envelope tracking power supply, and supply control circuitry; operating in one of a normal operation mode and a calibration mode; receiving and amplifying an RF input signal to provide an RF transmit signal using an envelope power supply signal; and during the calibration mode, controlling the envelope tracking power supply to cause a sharp transition of the envelope power supply signal when a setpoint of the envelope power supply signal transitions through a setpoint threshold of the envelope power supply signal, wherein a maximum rate of change of the envelope power supply signal during the sharp transition is greater than a maximum rate of change of the envelope power supply signal during the normal operation mode.
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Specification