Digitally Controlled Envelope Tracking Power Supply for an RF Power Amplifier

Lars Tønnes Jakobsen; Michael Andreas E. Andersen

doi:10.1109/INTLEC.2007.4448857

Digitally Controlled Envelope Tracking Power Supply for an RF Power Amplifier

Lars Tønnes Jakobsen
, Michael Andreas E. Andersen

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

A new Digital Self-Oscillating (DiSOM) modulator is presented in this paper. The advantage of the DiSOM is that it allows the sampling frequency of the digital compensator to be higher than the switching frequency, but it also has the ability to shape the quantization noise on the switching output due to clock frequency quantization. An envelope tracking power supply for an RF Power Amplifier (RFPA) can help improve system efficiency by reducing the power consumption of the RFPA. To show the advantage of the DiSOM over traditional counter based Digital PWM modulators two designs were compared in both simulation and by experiment. The results shows that the DiSOM could give an increase in open loop bandwidth by more than a factor of two and an reduce the closed loop output impedance of the power supply by a factor of 5 at the output filter resonance frequency.

Original language	English
Title of host publication	International Telecommunications Energy Conference
Publisher	IEEE
Publication date	2007
ISBN (Print)	978-1-4244-1627-1
DOIs	https://doi.org/10.1109/INTLEC.2007.4448857
Publication status	Published - 2007
Event	29^th International Telecommunications Energy Conference - Rome, Italy Duration: 30 Sept 2007 → 4 Oct 2007 Conference number: 29

Conference

Conference	29^th International Telecommunications Energy Conference
Number	29
Country/Territory	Italy
City	Rome
Period	30/09/2007 → 04/10/2007

Bibliographical note

Copyright: 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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title = "Digitally Controlled Envelope Tracking Power Supply for an RF Power Amplifier",

abstract = "A new Digital Self-Oscillating (DiSOM) modulator is presented in this paper. The advantage of the DiSOM is that it allows the sampling frequency of the digital compensator to be higher than the switching frequency, but it also has the ability to shape the quantization noise on the switching output due to clock frequency quantization. An envelope tracking power supply for an RF Power Amplifier (RFPA) can help improve system efficiency by reducing the power consumption of the RFPA. To show the advantage of the DiSOM over traditional counter based Digital PWM modulators two designs were compared in both simulation and by experiment. The results shows that the DiSOM could give an increase in open loop bandwidth by more than a factor of two and an reduce the closed loop output impedance of the power supply by a factor of 5 at the output filter resonance frequency.",

author = "Jakobsen, \{Lars T{\o}nnes\} and Andersen, \{Michael Andreas E.\}",

note = "Copyright: 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; 29<sup>th</sup> International Telecommunications Energy Conference, INTELEC 07 ; Conference date: 30-09-2007 Through 04-10-2007",

year = "2007",

doi = "10.1109/INTLEC.2007.4448857",

language = "English",

isbn = "978-1-4244-1627-1",

booktitle = "International Telecommunications Energy Conference",

publisher = "IEEE",

address = "United States",

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T1 - Digitally Controlled Envelope Tracking Power Supply for an RF Power Amplifier

AU - Jakobsen, Lars Tønnes

AU - Andersen, Michael Andreas E.

N1 - Conference code: 29

PY - 2007

Y1 - 2007

N2 - A new Digital Self-Oscillating (DiSOM) modulator is presented in this paper. The advantage of the DiSOM is that it allows the sampling frequency of the digital compensator to be higher than the switching frequency, but it also has the ability to shape the quantization noise on the switching output due to clock frequency quantization. An envelope tracking power supply for an RF Power Amplifier (RFPA) can help improve system efficiency by reducing the power consumption of the RFPA. To show the advantage of the DiSOM over traditional counter based Digital PWM modulators two designs were compared in both simulation and by experiment. The results shows that the DiSOM could give an increase in open loop bandwidth by more than a factor of two and an reduce the closed loop output impedance of the power supply by a factor of 5 at the output filter resonance frequency.

AB - A new Digital Self-Oscillating (DiSOM) modulator is presented in this paper. The advantage of the DiSOM is that it allows the sampling frequency of the digital compensator to be higher than the switching frequency, but it also has the ability to shape the quantization noise on the switching output due to clock frequency quantization. An envelope tracking power supply for an RF Power Amplifier (RFPA) can help improve system efficiency by reducing the power consumption of the RFPA. To show the advantage of the DiSOM over traditional counter based Digital PWM modulators two designs were compared in both simulation and by experiment. The results shows that the DiSOM could give an increase in open loop bandwidth by more than a factor of two and an reduce the closed loop output impedance of the power supply by a factor of 5 at the output filter resonance frequency.

U2 - 10.1109/INTLEC.2007.4448857

DO - 10.1109/INTLEC.2007.4448857

M3 - Article in proceedings

SN - 978-1-4244-1627-1

BT - International Telecommunications Energy Conference

PB - IEEE

T2 - 29<sup>th</sup> International Telecommunications Energy Conference

Y2 - 30 September 2007 through 4 October 2007

ER -

Digitally Controlled Envelope Tracking Power Supply for an RF Power Amplifier

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