PA envelope power supply undershoot compensation
First Claim
1. Circuitry comprising:
- a power amplifier (PA) envelope power supply adapted to provide an envelope power supply signal based on an envelope control signal;
control circuitry adapted to;
determine if a step change of the envelope control signal from a high magnitude to a low magnitude exceeds a step change limit;
if the step change exceeds the step change limit, modify the envelope control signal by using an intermediate magnitude for a period of time, wherein the intermediate magnitude is between the high magnitude and the low magnitude; and
if the step change does not exceed the step change limit, do not modify the envelope control signal.
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Accused Products
Abstract
A power amplifier (PA) envelope power supply, which provides an envelope power supply signal to radio frequency (RF) PA circuitry, and a process to prevent undershoot of the PA envelope power supply is disclosed. The process includes determining if an envelope control signal to the PA envelope power supply has a step change from a high magnitude to a low magnitude that exceeds a step change limit. Such a step change may cause undershoot of the PA envelope power supply. As such, if the step change exceeds the step change limit, the envelope control signal is modified to use an intermediate magnitude for period of time. Otherwise, if the step change does not exceed the step change limit, the envelope control signal is not modified.
219 Citations
20 Claims
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1. Circuitry comprising:
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a power amplifier (PA) envelope power supply adapted to provide an envelope power supply signal based on an envelope control signal; control circuitry adapted to; determine if a step change of the envelope control signal from a high magnitude to a low magnitude exceeds a step change limit; if the step change exceeds the step change limit, modify the envelope control signal by using an intermediate magnitude for a period of time, wherein the intermediate magnitude is between the high magnitude and the low magnitude; and if the step change does not exceed the step change limit, do not modify the envelope control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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providing a power amplifier (PA) envelope power supply; providing an envelope power supply signal based on an envelope control signal; determining if a step change of the envelope control signal from a high magnitude to a low magnitude exceeds a step change limit; if the step change exceeds the step change limit, modifying the envelope control signal by using an intermediate magnitude for a period of time; and if the step change does not exceed the step change limit, not modifying the envelope control signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification