کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
542397 871552 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-efficiency dynamic supply CMOS audio power amplifier for low-power applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر سخت افزارها و معماری
پیش نمایش صفحه اول مقاله
High-efficiency dynamic supply CMOS audio power amplifier for low-power applications
چکیده انگلیسی

This paper describes the analysis and design of a dynamic supply CMOS audio power amplifier for low-power applications. The dynamic supply technique is used to increase the efficiency of a class AB power amplifier. The polarization of its output stage is adaptive so that the maximum efficiency enhancement can be achieved without jeopardizing the linearity of the system. Two types of adaptive polarization are proposed and compared. A concept of power supplies switching is also proposed. Simulation results are presented showing that an efficiency of 53.6% at a total harmonic distortion (THD) of less than 0.1% can be achieved, whereas the maximal theoretical value for a class AB amplifier is approximately 33.3%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microelectronics Journal - Volume 40, Issue 8, August 2009, Pages 1175–1183
نویسندگان
, , , ,