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US 9,263,991 B2Granted
Power management/power amplifier operation under dynamic battery drops
AssigneeRF Micro Devices, Inc.
InventorsNadim Khlat, Jean-Blaise Pierres, Michael R Kay
Life of this patent
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Abstract
In one embodiment, a digital internal amplified voltage of power management circuitry is forced to an input threshold voltage upon a determination that a set of emergency conditions is satisfied, and is set to an input minimum battery voltage upon a determination that the set of emergency conditions is not satisfied. The emergency conditions may include determining that a battery voltage is less than a threshold voltage and determining that an input minimum battery voltage is less than an input threshold voltage.
Claims17
Power management circuitry comprising:
- power converter circuitry configured to receive a battery voltage and provide a converted supply voltage for biasing radio frequency (RF) power amplifier (PA) circuitry;
- logic circuitry coupled to the power converter circuitry and configured to:
- determine whether a condition is satisfied, the condition comprising that the battery voltage is below a minimum battery voltage threshold;
- if the condition is satisfied, cause the power converter circuitry to provide the converted supply voltage as a constant voltage;
- and
- if the condition is not satisfied, cause the power converter circuitry to provide the converted supply voltage such that the RF PA circuitry operates in one of an envelope tracking mode and an average power tracking mode.
3 more elements
Communication circuitry comprising:
- radio frequency (RF) power amplifier (PA) circuitry configured to receive and amplify RF signals based at least in part on a converted supply voltage;
- and
- power management circuitry coupled to the RF PA circuitry and configured to:
- determine whether a condition is satisfied, the condition comprising that a battery voltage is below a minimum battery voltage threshold;
- if the condition is satisfied, provide the converted supply voltage as a constant voltage;
- and
- if the condition is not satisfied, provide the converted supply voltage such that the RF PA circuitry operates in one of an envelope tracking mode and an average power tracking mode.
4 more elements
Dependencies are inferred from the claim text.