New circuit models of Complementary-Symmetry Class-AB and Class-B Push-Pull Amplifiers

Author

Shukla, Satyavati ; Pandey, Bishwajeet ; Srivastava, Sanjeev

Author_Institution

Dept. of Phys. & Electron., Dr. Ram Manohar Lohia Avadh Univ., Faizabad, India

fYear

2012

fDate

19-21 Sept. 2012

Firstpage

538

Lastpage

542

Abstract

New circuit models of `Complementary-Symmetry Class-AB and Class-B Push-Pull Amplifiers´ are proposed. The proposed Class-AB amplifier circuit, configured by matched Darlington pairs, possesses 62.83% efficiency with low harmonic distortion (0.94%). However the proposed Class-B amplifier that is configured by using Triple Darlington configuration of matched BJTs, produces improved efficiency (73.28%) on the cost of enhanced harmonic distortion (1.23%). The proposed circuit model of Class-B Amplifier is perhaps a fresh approach. Variation of efficiency and total harmonic distortion as a function of biasing resistances and temperature are also observed. Proposed power amplifier may be quite useful for transmitters and other analog communication circuits.

Keywords

harmonic distortion; microwave power amplifiers; radio transmitters; analog communication circuits; biasing resistances; circuit models; complementary-symmetry class-AB push-pull amplifiers; complementary-symmetry class-B push-pull amplifiers; harmonic distortion; low harmonic distortion; matched BJT; matched Darlington pairs; power amplifier; transmitters; triple Darlington configuration; Power amplifiers; Radio frequency; Resistance; Total harmonic distortion; Transistors; Transmitters; Class-B and Class-AB Amplifiers; Power Amplifiers; Triple Darlington amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Semiconductor Electronics (ICSE), 2012 10th IEEE International Conference on

Conference_Location

Kuala Lumpur

Print_ISBN

978-1-4673-2395-6

Electronic_ISBN

978-1-4673-2394-9

Type

conf

DOI

10.1109/SMElec.2012.6417203

Filename

6417203