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US 2014/0155127 A1Published application
Envelope Tracker Path Adaptation for Power Saving
AssigneeBroadcom Corporation
InventorsSriraman Dakshinamurthy, Robert Gustav Lorenz
Life of this patent
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Abstract
In response to changing power output requirements of a UE, an envelope tracking (ET) path of a transmission chain changes power modes. When the UE output power is below a threshold, the ET path may switch an ET power supply to a low power mode. With the switch to low power mode, the UE may also set one or more of the other components in the ET path to a low power mode of operation to save additional power.
Claims20
A system comprising:
- a power supply comprising a voltage output and a reference signal input;
- a power supply path that drives the reference signal input;
- and
- a controller operable to:
- determine to place the power supply in a low power mode;
- set the power supply to the low power mode;
- and
- implement a power reduction action in the power supply path in response to determining to place the power supply in low power mode.
5 more elements
A method comprising:
- generating, with a power converter, an output power supply voltage that tracks an input signal envelope of an input signal when the power converter is operating in a high power mode of operation;
- generating the input signal for the power converter using components in an envelope tracking path preceding the power converter;
- switching the power converter to a low power mode of operation;
- and
- placing at least one of the components in the envelope tracking path into a reduced power mode of operation responsive to switching the power converter to the low power mode.
2 more elements
A system comprising:
- a controller that determines whether to operate in a first mode or a second mode of operation;
- envelope circuitry operable to, while in the first mode, convert an input signal to an envelope signal;
- and
- a power supply operable to generate a power supply voltage output in both the first mode and the second mode of operation, where:
- while the power supply is in the first mode, the power supply is operable to generate a power supply voltage output that follows the envelope signal;
- and
- while the power supply is in the second mode, the envelope circuitry is configured to operate according to a reduced resource requirement in comparison to its operation while the power supply is in the first mode.
4 more elements
Dependencies are inferred from the claim text.