Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance

M. Acar; Anne J. Annema; Bram Nauta

doi:10.1109/ISCAS.2007.378758

Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance

M. Acar, Anne J. Annema, Bram Nauta

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

18 Citations (Scopus)

241 Downloads (Pure)

Abstract

Many critical design trade-offs of the Class-E poweramplifier (e.g power efficiency) are influenced by the switch onresistanceand the value of dc-feed drain inductance. In literature,the time-domain mathematical analyses of the Class-E poweramplifier with finite dc-feed inductance assume zero switch onresistancein order to alleviate the mathematical difficulties;resulting in non-optimum designs.We present analytical design equations in this paper forClass-E power amplifier taking into account both finite draininductance and switch on-resistance. The analysis indicates theexistence of infinitely many design equations; conclusions include:1) Class-E conditions (e.g. zero voltage and zero slope) can besatisfied in the presence of switch-on resistance.2) The drain-efficiency (η) of the Class-E power amplifier isupper limited for a certain operation frequency and transistortechnology.3) Using a finite dc-feed inductance instead of an RF-choke ina Class-E power amplifier can increase η by ≈ 30%.

Original language	English
Title of host publication	The IEEE International Symposium on Circuits and Systems (ISCAS)-2007.
Place of Publication	Piscataway
Publisher	IEEE Computer Society Press
Pages	2818-2821
Number of pages	4
ISBN (Print)	1-4244-0921-7
DOIs	https://doi.org/10.1109/ISCAS.2007.378758
Publication status	Published - 27 May 2007
Event	IEEE International Symposium on Circuits and Systems, ISCAS 2007 - New Orleans, United States Duration: 27 May 2007 → 30 May 2007 http://www.iscas2007.org/

Publication series

Name
Publisher	IEEE

Conference

Conference	IEEE International Symposium on Circuits and Systems, ISCAS 2007
Abbreviated title	ISCAS 2007
Country	United States
City	New Orleans
Period	27/05/07 → 30/05/07
Internet address	http://www.iscas2007.org/

Keywords

EWI-9991
IR-58152
METIS-245717

Access to Document

10.1109/ISCAS.2007.378758

analytical_design
open
Final published version, 353 KB

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Acar, M., Annema, A. J., & Nauta, B. (2007). Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance. In The IEEE International Symposium on Circuits and Systems (ISCAS)-2007. (pp. 2818-2821). Piscataway: IEEE Computer Society Press. https://doi.org/10.1109/ISCAS.2007.378758

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title = "Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance",

abstract = "Many critical design trade-offs of the Class-E poweramplifier (e.g power efficiency) are influenced by the switch onresistanceand the value of dc-feed drain inductance. In literature,the time-domain mathematical analyses of the Class-E poweramplifier with finite dc-feed inductance assume zero switch onresistancein order to alleviate the mathematical difficulties;resulting in non-optimum designs.We present analytical design equations in this paper forClass-E power amplifier taking into account both finite draininductance and switch on-resistance. The analysis indicates theexistence of infinitely many design equations; conclusions include:1) Class-E conditions (e.g. zero voltage and zero slope) can besatisfied in the presence of switch-on resistance.2) The drain-efficiency (η) of the Class-E power amplifier isupper limited for a certain operation frequency and transistortechnology.3) Using a finite dc-feed inductance instead of an RF-choke ina Class-E power amplifier can increase η by ≈ 30{\%}.",

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Acar, M, Annema, AJ & Nauta, B 2007, Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance. in The IEEE International Symposium on Circuits and Systems (ISCAS)-2007.. IEEE Computer Society Press, Piscataway, pp. 2818-2821, IEEE International Symposium on Circuits and Systems, ISCAS 2007, New Orleans, United States, 27/05/07. https://doi.org/10.1109/ISCAS.2007.378758

Analytical design equations for Class-E power amplifiers with finite DC-Feed inductance and switch on-resistance. / Acar, M.; Annema, Anne J.; Nauta, Bram.

The IEEE International Symposium on Circuits and Systems (ISCAS)-2007.. Piscataway : IEEE Computer Society Press, 2007. p. 2818-2821.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Y1 - 2007/5/27

N2 - Many critical design trade-offs of the Class-E poweramplifier (e.g power efficiency) are influenced by the switch onresistanceand the value of dc-feed drain inductance. In literature,the time-domain mathematical analyses of the Class-E poweramplifier with finite dc-feed inductance assume zero switch onresistancein order to alleviate the mathematical difficulties;resulting in non-optimum designs.We present analytical design equations in this paper forClass-E power amplifier taking into account both finite draininductance and switch on-resistance. The analysis indicates theexistence of infinitely many design equations; conclusions include:1) Class-E conditions (e.g. zero voltage and zero slope) can besatisfied in the presence of switch-on resistance.2) The drain-efficiency (η) of the Class-E power amplifier isupper limited for a certain operation frequency and transistortechnology.3) Using a finite dc-feed inductance instead of an RF-choke ina Class-E power amplifier can increase η by ≈ 30%.

AB - Many critical design trade-offs of the Class-E poweramplifier (e.g power efficiency) are influenced by the switch onresistanceand the value of dc-feed drain inductance. In literature,the time-domain mathematical analyses of the Class-E poweramplifier with finite dc-feed inductance assume zero switch onresistancein order to alleviate the mathematical difficulties;resulting in non-optimum designs.We present analytical design equations in this paper forClass-E power amplifier taking into account both finite draininductance and switch on-resistance. The analysis indicates theexistence of infinitely many design equations; conclusions include:1) Class-E conditions (e.g. zero voltage and zero slope) can besatisfied in the presence of switch-on resistance.2) The drain-efficiency (η) of the Class-E power amplifier isupper limited for a certain operation frequency and transistortechnology.3) Using a finite dc-feed inductance instead of an RF-choke ina Class-E power amplifier can increase η by ≈ 30%.

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