thd analysis in closed-loop analog PWM class-D amplifiers

سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 613

فایل این مقاله در 5 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

JR_JECEI-2-1_001

تاریخ نمایه سازی: 15 آذر 1394

چکیده مقاله:

in this paper we investigate the parameters affecting total harmonic distortion and power supply rejection ratio in PWM class D amplifiers on the basis of linear models with feedback.from our mathematical analysis we show that the THD of a PWM class D amplifier with feedback can be improved by increasing the gain of the integrator through adding another amplifier at the output of integrator.we also show taht the THD can be further improved by means of two cascaded amplifiers.simulation results show that the THD of the gain boosting and the two cascaded amplifiers with a singel pole CDAscan be improved by as much as 1.4 times and 2 times respectively.

کلیدواژه ها:

class-D amplifiers-audio amplifiers switching amplifiers THD distortion pulse width modulation

نویسندگان

parviz amiri

faculty of electrical and computer engineering shahid rajaee teacher traning university tehran iran

mostafa kohestani

faculty of electrical and computer engineering shahid rajaee teacher traning university tehran iran

mahmood seifouri

faculty of electrical and computer engineering shahid rajaee teacher traning university tehran iran