CPC H03F 1/0216 (2013.01) [H03F 3/21 (2013.01); H03F 2200/105 (2013.01); H03F 2200/171 (2013.01)] | 15 Claims |
1. A digital envelop tracker circuitry, comprising:
a level selection circuitry configured to determine a level of supply voltage based on a power of an input data stream and generate a level select signal,
wherein the level select signal is generated based on a series of voltage level switching events triggered by each determined level of supply voltage,
wherein the level selection circuitry comprises:
a primary switching circuitry configured to schedule a primary switching event of the switch based on the determined level of supply voltage,
a secondary switching circuitry configured to schedule secondary switching events of the switch at time instances delayed from the primary switching event based on the determined level of supply voltage, and
a combiner configured to combine the primary switching event and previously scheduled secondary switching events to generate the level select signal, and
a switch configured to connect one of a plurality of supply voltages in different levels to a supply filter based on the level select signal.
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