Title :
Using PWM Output as a Digital-to-Analog Converter on DSP
Author :
Zhou, Feng ; Xiong, Wei
Author_Institution :
Coll. of Comput. Sci. & Technol., Guizhou Univ., Guiyang, China
Abstract :
This paper presents a method for utilizing the on-chip PWM (pulse width modulated) generators on a TMS320C240 DSP for digital-to-analog (D/A) conversion. The method involves analog low-pass filtering the PWM signal to remove high frequency components, leaving only the low-frequency content. Theoretical and experimental results are presented to quantify the achievable bit resolution. In addition, analog low-pass filter design is discussed and an example 3rd order filter design is given.
Keywords :
PWM power convertors; digital signal processing chips; digital-analogue conversion; logic design; low-pass filters; 3rd order filter design; DSP; TMS320C240; analog low-pass filtering; digital-to-analog conversion; digital-to-analog converter; on-chip PWM pulse width modulated generators; Bandwidth; Cutoff frequency; Digital signal processing; Filtering theory; Low pass filters; Power harmonic filters; Pulse width modulation; TMS320C240 DSP; converter; digital-to-analog; filter; pulse width modulated;
Conference_Titel :
System Science, Engineering Design and Manufacturing Informatization (ICSEM), 2010 International Conference on
Conference_Location :
Yichang
Print_ISBN :
978-1-4244-8664-9
DOI :
10.1109/ICSEM.2010.162
