Envelope tracking system with adjustment for noise
AssigneeQuantance, Inc.
InventorSerge Francois Drogi
Life of this patent
Estimating the term…
Abstract
An envelope tracking transceiver dynamically adjusts envelope tracking parameters to achieve the desired tradeoff between noise performance and power efficiency. When higher levels of noise are acceptable, the envelope tracking transceiver dynamically adjusts transmitter parameters to achieve better power efficiency while sacrificing noise performance. When lower levels of noise are desired, the envelope tracking transceiver dynamically adjusts parameters to achieve better noise performance while sacrificing efficiency.
Claims20
An envelope tracking transceiver comprising:
- a power amplifier powered by a supply voltage and configured to receive an input signal and generate an output signal;
- a power supply configured to provide the supply voltage to the power amplifier based on a control signal;
- a lookup circuit configured to generate the control signal based on an estimated amplitude of the input signal;
- a receiver configured to receive a signal and to generate a feedback signal indicative of a noise margin of the received signal;
- and
- a configuration circuit configured to control at least one of the lookup circuit, the power supply, and the power amplifier based on the feedback signal to decrease noise generated by the power amplifier responsive to the noise margin being below a threshold and to allow an increase in the noise generated by the power amplifier by increasing power efficiency of the power amplifier responsive to the noise margin being above the threshold.
A power supply system for a transceiver that includes a power amplifier, the power supply system comprising:
- a power supply configured to provide a supply voltage to the power amplifier based on a control signal;
- a lookup circuit configured to receive an estimated amplitude of an input signal provided to the power amplifier and generate the control signal based on the estimated amplitude of the input signal;
- and
- a configuration circuit configured to receive a feedback signal indicative of a noise margin of a signal received by the transceiver and control at least one of the lookup circuit, the power supply, and the power amplifier based on the feedback signal to decrease noise generated by the power amplifier responsive to the noise margin being below a threshold and to allow an increase in the noise generated by the power amplifier by increasing power efficiency of the power amplifier responsive to the noise margin being above the threshold.
Dependencies are inferred from the claim text.