Digital multi-level envelope tracking for wide-bandwidth signals
AssigneeIntel IP Corporation
InventorEmanuel Cohen
Life of this patent
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Abstract
Digital envelope tracking with multilevel supply voltages is performed for wide-bandwidth signals. A digital control component generates a digital control code that facilitates switching of resistor values of one or more resistors coupled between a power amplifier and a supply voltage of plurality of supply voltages. A driver component supplies an envelope voltage of the plurality of supply voltages for the power amplifier as a function of the digital control code.
Claims25
A system for envelope tracking comprising:
- a digital control component configured to generate a digital control code to switch resistances between a power amplifier and one of a plurality of supply voltages to generate an envelope voltage to the power amplifier;
- a driver component configured to selectively supply the one of the plurality of supply voltages to generate the envelope voltage to the power amplifier based on the digital control code;
- and
- a transition component configured to mitigate transitional noise that results from a transition between the plurality of supply voltages as a function of the digital control code by generating at least one additional transition step to the transition by digitally operating a switch from a first set of switches and another switch from a second set of switches concurrently.
A method for envelope tracking comprising:
- generating, via a digital control component, a digital control code based on an envelope input signal;
- generating a transition between a plurality of supply voltages for a power amplifier from a first supply voltage to a second supply voltage as a function of the digital control code;
- generating an envelope voltage to the power amplifier from the second supply voltage;
- and
- reducing a transitional noise that results from a transition among the plurality of supply voltages as a function of the digital control code by generating an additional transition step to the transition by digitally operating a switch concurrently from a first set of switches and another switch from a second set of switches.
A mobile device that facilitates digital multilevel voltage envelope tracking, comprising:
- a memory storing executable instructions;
- and
- a processor, coupled to the memory, configured to execute the executable instructions to at least:
- generate a digital control code to track an envelope voltage to a power amplifier;
- generate a switching of a resistor value with at least one of a first plurality of switches or a second plurality of switches coupled between the power amplifier and a plurality of supply voltages respectively to generate the envelope voltage based on the digital control code;
- supply the envelope voltage generated from the plurality of supply voltages to the power amplifier;
- and
- reduce a transitional noise that results from the transition among the plurality of supply voltages based on the digital control code by generating an additional transition step to the transition by digitally operating a switch concurrently from a first set of switches and another switch from a second set of switches.
Dependencies are inferred from the claim text.