ENVELOPE TRACKING POWER SUPPLY VOLTAGE DYNAMIC RANGE REDUCTION
First Claim
1. In a radio frequency (RF) system that includes an RF power amplifier (PA) configured to use an envelope tracking power supply voltage to provide an RF transmit signal, which has an RF envelope;
- and further includes an envelope tracking power supply configured to provide the envelope tracking power supply voltage based on a setpoint;
RF transceiver circuitry comprising;
envelope control circuitry configured to provide the setpoint, such that the envelope tracking power supply voltage is clipped to form clipped regions and substantially tracks the RF envelope between the clipped regions, wherein a dynamic range of the envelope tracking power supply voltage is limited; and
an RF modulator configured to provide an RF input signal to the RF PA, which receives and amplifies the RF input signal to provide the RF transmit signal.
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Accused Products
Abstract
A radio frequency (RF) system includes an RF power amplifier (PA), which uses an envelope tracking power supply voltage to provide an RF transmit signal, which has an RF envelope; and further includes an envelope tracking power supply, which provides the envelope tracking power supply voltage based on a setpoint. RF transceiver circuitry, which includes envelope control circuitry and an RF modulator is disclosed. The envelope control circuitry provides the setpoint, such that the envelope tracking power supply voltage is clipped to form clipped regions and substantially tracks the RF envelope between the clipped regions, wherein a dynamic range of the envelope tracking power supply voltage is limited. The RF modulator provides an RF input signal to the RF PA, which receives and amplifies the RF input signal to provide the RF transmit signal.
82 Citations
29 Claims
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1. In a radio frequency (RF) system that includes an RF power amplifier (PA) configured to use an envelope tracking power supply voltage to provide an RF transmit signal, which has an RF envelope;
- and further includes an envelope tracking power supply configured to provide the envelope tracking power supply voltage based on a setpoint;
RF transceiver circuitry comprising;envelope control circuitry configured to provide the setpoint, such that the envelope tracking power supply voltage is clipped to form clipped regions and substantially tracks the RF envelope between the clipped regions, wherein a dynamic range of the envelope tracking power supply voltage is limited; and an RF modulator configured to provide an RF input signal to the RF PA, which receives and amplifies the RF input signal to provide the RF transmit signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- and further includes an envelope tracking power supply configured to provide the envelope tracking power supply voltage based on a setpoint;
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16. Circuitry comprising:
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transmitter control circuitry configured to provide a setpoint, such that an envelope tracking power supply voltage is clipped to form clipped regions and substantially tracks an RF envelope between the clipped regions, wherein a dynamic range of the envelope tracking power supply voltage is limited; a radio frequency (RF) power amplifier (PA) configured to receive and amplify an RF input signal to provide an RF transmit signal, which has the RF envelope, using the envelope tracking power supply voltage; and an envelope tracking power supply configured to provide the envelope tracking power supply voltage based on the setpoint. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification