Adjustable Phase, Discrete Time Sinewave Generator

  • Klunium, Sawitree (Faculty of Engineering and Research Center for Communication and Information Technology, King Mongkut's Institute of Technology Ladkrabang) ;
  • Praesombool, Sukunya (Faculty of Engineering and Research Center for Communication and Information Technology, King Mongkut's Institute of Technology Ladkrabang) ;
  • Hinjit, Watcharapong (Department of Industrial Physic & Medical Instrumentation, King Mongkut's Institute of Technology North Bangkok) ;
  • Yimman, Surapun (Department of Industrial Physic & Medical Instrumentation, King Mongkut's Institute of Technology North Bangkok) ;
  • Dejhan, Kobchai (Faculty of Engineering and Research Center for Communication and Information Technology, King Mongkut's Institute of Technology Ladkrabang)
  • Published : 2004.08.25

Abstract

The following paper proposes the new design of digital sine wave generator which allows users to define the phase shift of the out put sinewave according to user's demands. This new sinewave generator will have 2 outputs, cos(${\omega}_0n$) and cos(${\omega}_0n$+${\phi}$) The design of the new system starts from the construction of discrete time system with impulse response as cos(${\omega}_0n$) in a pair of conjugate complex poles and a pair of zeros at the origin and the real axis. If users want to make a phase shift of sign wave, users can change the position of zero at the real axis. The results of the experiment have shown that the new design of sign wave generator has generated sine wave with the correct phase shift according to the theory.

Keywords