公开(公告)号：US10090808B1

公开(公告)日：2018-10-02

申请号：US15474186

申请日：2017-03-30

Applicant: Intel IP Corporation

Inventor： Stephan Henzler ,  Andreas Menkhoff ,  Thomas Eichler ,  Wolfgang Walthes ,  Alexander Belitzer ,  Yifan Wang

IPC: H03F1/30 ,  H03F1/02 ,  H03F3/19 ,  H03F3/21 ,  H02M3/07 ,  H03M1/66

Abstract: An envelope tracking system for controlling a power amplifier supply voltage includes envelope circuitry and a feed forward digital to analog converter (DAC) circuitry. The envelope circuitry is configured to generate a target envelope signal based on a selected power amplifier supply voltage. The feed forward DAC circuitry includes a voltage source circuitry and a selector circuitry. The voltage source circuitry is configured to generate a plurality of voltages. The selector circuitry is configured to select one of the plurality of voltages based at least on the target envelope signal. The feed forward DAC circuitry is configured to provide the selected voltage to a supply voltage input of a power amplifier that amplifies a radio frequency (RF) transmit signal.

公开(公告)号：US20180287563A1

公开(公告)日：2018-10-04

申请号：US15474186

申请日：2017-03-30

Applicant: Intel IP Corporation

Inventor： Stephan Henzler ,  Andreas Menkhoff ,  Thomas Eichler ,  Wolfgan Walthes ,  Alexander Belitzer ,  Yifan Wang

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

Abstract: An envelope tracking system for controlling a power amplifier supply voltage includes envelope circuitry and a feed forward digital to analog converter (DAC) circuitry. The envelope circuitry is configured to generate a target envelope signal based on a selected power amplifier supply voltage. The feed forward DAC circuitry includes a voltage source circuitry and a selector circuitry. The voltage source circuitry is configured to generate a plurality of voltages. The selector circuitry is configured to select one of the plurality of voltages based at least on the target envelope signal. The feed forward DAC circuitry is configured to provide the selected voltage to a supply voltage input of a power amplifier that amplifies a radio frequency (RF) transmit signal.

公开(公告)号：US20190036486A1

公开(公告)日：2019-01-31

申请号：US16140991

申请日：2018-09-25

Applicant: Intel IP Corporation

Inventor： Stephan Henzler ,  Andreas Menkhoff ,  Thomas Eichler ,  Wolfgang Walthes ,  Alexander Belitzer ,  Yifan Wang

IPC: H03F1/02 ,  H03M1/66 ,  H03F3/24 ,  H03F3/189 ,  H03F3/19 ,  H03F3/21 ,  H03F3/68 ,  H02M3/07 ,  H02M3/158

Abstract: An envelope tracking system for controlling a power amplifier supply voltage includes envelope circuitry and a feed forward digital to analog converter (DAC) circuitry. The envelope circuitry is configured to generate a target envelope signal based on a selected power amplifier supply voltage. The feed forward DAC circuitry includes a voltage source circuitry and a selector circuitry. The voltage source circuitry is configured to generate a plurality of voltages. The selector circuitry is configured to select one of the plurality of voltages based at least on the target envelope signal. The feed forward DAC circuitry is configured to provide the selected voltage to a supply voltage input of a power amplifier that amplifies a radio frequency (RF) transmit signal.