Title :
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
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;
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
DOI :
10.1109/SMElec.2012.6417203
