Pulse width modulation based on phase locked loop

Author

Wisartpong, P. ; Koseeyaporn, J. ; Wardkein, P.

Author_Institution

Dept. of Telecommun. Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok

Volume

2

fYear

2008

fDate

14-17 May 2008

Firstpage

697

Lastpage

700

Abstract

A new circuit structure which improves performance of a pulse width modulator is proposed in this paper. The proposed PWM circuit is based on a phase locked loop (PLL) system where the input signal is fed to combine with the output of a phase detector (PD) which can achieve a high accuracy PWM output. In addition, we also use R-S flip-flop and monostable circuit as a phase detector which gives rise to get a PWM modulator that wide input range. The experimental results agree well with an analytical result.

Keywords

flip-flops; modulators; phase detectors; phase locked loops; pulse width modulation; PLL system; PWM output; R-S flip-flop circuit; mono stable circuit; phase detector; phase locked loop system; pulse width modulator; Detectors; Flip-flops; Phase detection; Phase locked loops; Phase modulation; Pulse circuits; Pulse width modulation; Sampling methods; Signal generators; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2008. ECTI-CON 2008. 5th International Conference on

Conference_Location

Krabi

Print_ISBN

978-1-4244-2101-5

Electronic_ISBN

978-1-4244-2102-2

Type

conf

DOI

10.1109/ECTICON.2008.4600526

Filename

4600526