公开(公告)号：US20210376795A1

公开(公告)日：2021-12-02

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

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.

公开(公告)号：US20210075372A1

公开(公告)日：2021-03-11

申请号：US17031944

申请日：2020-09-25

Applicant: Intel Corporation

Inventor： Stephan HENZLER ,  Andreas LANGER ,  Bernhard RAAF

IPC: H03F1/02 ,  H03F3/19 ,  H03F3/21 ,  H02M3/07 ,  H03M1/66 ,  H03F3/189 ,  H03F3/24 ,  H03F3/68

Abstract: Systems, methods, and circuitries are provided for generating a power amplifier supply voltage based on a target envelope signal for a radio frequency (RF) transmit signal. An envelope tracking system includes a first selector circuitry and predistortion circuitry. The first selector circuitry is disposed in a selector module and is configured to input a plurality of voltages conducted on a first plurality of power lanes, wherein the first plurality of power lanes is part of a power distribution network; select a voltage from the plurality of voltages based on the target envelope signal; and provide the selected voltage to a supply lane connected to an input of the power amplifier that amplifies the RF transmit signal. The predistortion circuitry is configured to modify the RF transmit signal based on a selected power lane of the first plurality of power lanes that conducts the selected voltage.