thd analysis in closed-loop analog PWM class-D amplifiers
سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 613
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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