کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
541417 871465 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A THD-reduction high-efficiency audio amplifier using inverter-based OTAs with filter-output feedback
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر سخت افزارها و معماری
پیش نمایش صفحه اول مقاله
A THD-reduction high-efficiency audio amplifier using inverter-based OTAs with filter-output feedback
چکیده انگلیسی

This paper presents an integrated low-voltage THD-reduction high-efficiency class-D audio amplifier using inverter-based operational transconductance amplifiers (OTAs). We propose a negative feedback loop which can compensate for external perturbations and improving output precision. The compensator increases the audio-frequency loop gain, and leads to a better rejection of audio-frequency disturbances. The use of inverter-based OTA and comparator provides low-voltage operation and low-power dissipation. The audio amplifier operates with a 1.5 V supply voltage with maximum power efficiency of 90%. The proposed class-D amplifier was implemented using a TSMC 0.18-μm 1P6M CMOS process, and the active chip area is 1.87 mm2.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microelectronics Journal - Volume 45, Issue 1, January 2014, Pages 102–109
نویسندگان
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