公开(公告)号：US11699977B2

公开(公告)日：2023-07-11

申请号：US17059489

申请日：2019-10-15

Applicant: Intel Corporation

Inventor： Stephan Henzler ,  Christian Kranz ,  Otto Schumacher ,  Bernhard Sogl

IPC: H03F1/02 ,  H03F3/21

CPC classification number: H03F1/0216 ,  H03F3/21 ,  H03F2200/105 ,  H03F2200/171

Abstract: A digital envelop tracker for a power amplifier. The digital envelop tracker includes a supply filter for filtering a supply voltage to a power amplifier, a level selection circuitry configured to determine a level of supply voltage based on an instantaneous power of an input data stream, schedule a series of switching events based on the determined level of supply voltage, and generate a level select signal based on the scheduled series of switching events, and a switch for connecting one of supply voltages to the supply filter based on the level select signal. The level selection circuitry schedules a primary switching event of the switch based on the determined level of supply voltage and secondary switching events of the switch delayed with respect to the primary switching event based on the determined level of supply voltage to generate a filter response of the supply filter with smaller peaking.