Campus Units
Electrical and Computer Engineering
Document Type
Conference Proceeding
Conference
2018 IEEE International Symposium on Circuits and Systems (ISCAS)
Publication Version
Accepted Manuscript
Link to Published Version
https://doi.org/10.1109/ISCAS.2018.8351568
Publication Date
2018
Journal or Book Title
2018 IEEE International Symposium on Circuits and Systems (ISCAS)
DOI
10.1109/ISCAS.2018.8351568
Conference Title
2018 IEEE International Symposium on Circuits and Systems (ISCAS)
Conference Date
May 27-30, 2018
City
Florence, Italy
Abstract
The optimum bias point for an inverse class-F power amplifier is discussed in this paper from a time-domain point of view. It is shown that the inverse class-F power amplifier should be biased in shallow triode region where the bias current is slightly higher than DC current when driven into compression. Lower bias currents can cause significant efficiency degradation due to peaking in the drain-source voltage. Simulation results show that drain efficiency at 6dB over drive drops from 83.4% to 65.2% when bias current is reduced by 34% from optimum bias current. Moreover, it is shown that if the bias current is too high, then the efficiency under power back off is reduced.
Rights
© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Copyright Owner
IEEE
Copyright Date
2018
Language
en
File Format
application/pdf
Recommended Citation
Li, Yifei and Neihart, Nathan, "Time-Domain Analysis of Optimum Bias Point in Inverse Class-F Power Amplifiers" (2018). Electrical and Computer Engineering Conference Papers, Posters and Presentations. 87.
https://lib.dr.iastate.edu/ece_conf/87
Comments
This is a manuscript of a proceeding published as Li, Yifei, and Nathan M. Neihart. "Time-Domain Analysis of Optimum Bias Point in Inverse Class-F Power Amplifiers." In 2018 IEEE International Symposium on Circuits and Systems (ISCAS), (2018): 10.1109/ISCAS.2018.8351568. Posted with permission.