Title :
Time-domain evaluation system of ΔΣ modulator for Class-D amplifier using FPGA
Author :
Yamashita, S. ; Takemoto, S. ; Hirano, S. ; Goto, T. ; Sakurai, M.
Author_Institution :
Dept. of Comput. Sci. & Eng., Nagoya Inst. of Technol., Nagoya, Japan
Abstract :
In digital audio systems, the ΔΣ modulator has been widely used as a digital-to-analog convertor (DAC) for Class-D amplifiers. The ΔΣ modulator is generally evaluated in the frequency domain [1]. In this paper, we propose a novel system to evaluate the ΔΣ modulator in the time domain by observing its transient response. In our system, we use a field-programmable gate array in order to reduce cost. Our system enables the ΔΣ modulator to evaluate its transient response in the time domain in real time.
Keywords :
amplifiers; delta-sigma modulation; field programmable gate arrays; time-domain analysis; transient response; ΔΣ modulator; Class-D amplifier; DAC; FPGA; digital audio systems; digital-to-analog convertor; field-programmable gate array; time-domain evaluation system; transient response; Data acquisition; Field programmable gate arrays; Flowcharts; Local area networks; Modulation; Time-domain analysis; Transient response; ΔΣ modulator; Class-D amplifier; Field-programmable gate array;
Conference_Titel :
Consumer Electronics (GCCE), 2014 IEEE 3rd Global Conference on
Conference_Location :
Tokyo
DOI :
10.1109/GCCE.2014.7031299
