Class AB Amplifier with Simultaneous Amplitude and Output Current Tracking
Publish place: 20th Iranian Conference on Electric Engineering
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ICEE20_134
تاریخ نمایه سازی: 14 مرداد 1391
Abstract:
In this paper a new technique is introduced for simultaneous amplitude and output current tracking of class AB amplifier. In the proposed circuit, the output voltage isprovided by a class AB amplifier benefiting from the linear characteristic of this amplifier. However, the load current is provided by a class D amplifier in order to increase theefficiency. Furthermore, the class D amplifier provides the supply voltage of class AB amplifier with the capability ofamplitude tracking. The proposed technique is simulated using PSpice software. Simulation results show efficiency improvement of at least 6% in comparison to currenttracking technique. Also, experimental results are presented to justify the validity of theoretical analysis and simulation results.
Authors
Soroosh Rasty Boroojeni
Department of Electrical and Computer Engineering, Isfahan University of Technology
Ehsan Adib
Member IEEE