Circuits, Systems, and Signal Processing

, Volume 32, Issue 2, pp 415–431 | Cite as

An 8-Bit Digitally Controlled Programmable Phase Shifter Circuit for Sinusoidal Signals with 252 Phase Control Range

  • Luis Abraham Sánchez Gaspariano
  • Clara Iliana Martínez Gómez
  • José Miguel Rocha Pérez
  • Jesús Ezequiel Molinar Solís
  • Jesús Manuel Muñoz Pacheco
  • Carlos Muñíz Montero
  • Alejandro Díaz Sánchez
Article

Abstract

In this paper, the synthesis, design, and implementation of a programmable phase shifter circuit for sinusoidal signals is presented. The proposed circuit, built-up herein with operational amplifiers (OPAMPs), high precision resistors and low voltage switches, consists of a digitally controlled amplitude attenuator in combination with a single-tone orthogonalizer. Experimental results agree with theoretical background: the attained phase range was 252 in 256 steps with a median step of 0.9. The inaccuracy of the circuit was determined to be of 0.03 %. Contrary to other OPAMP approaches for sinusoidal signals reported in the literature and based on a first-order all-pass filter structure, the approximation suggested in this work is based on a different concept. The achieved results demonstrate the functionality of the system for the case of a sinusoidal signal with frequency of 1 kHz. Notwithstanding, the proposed architecture can be extended to operate at higher frequencies by using different building blocks with larger bandwidth. Furthermore, it can be extended as well to work out with other periodic input waveforms, like triangular shapes or square waves, with the use of an appropriate orthogonalizer.

Keywords

Phase shifter circuit Vector projection Programmable amplitude attenuator Analog orthogonalizer 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Luis Abraham Sánchez Gaspariano
    • 1
  • Clara Iliana Martínez Gómez
    • 1
  • José Miguel Rocha Pérez
    • 2
  • Jesús Ezequiel Molinar Solís
    • 3
  • Jesús Manuel Muñoz Pacheco
    • 4
  • Carlos Muñíz Montero
    • 1
  • Alejandro Díaz Sánchez
    • 2
  1. 1.Universidad Politécnica de PueblaJuan C. BonillaMexico
  2. 2.Instituto Nacional de Astrofísica, Óptica y ElectrónicaSanta María TonantzintlaMexico
  3. 3.Universidad Autónoma del Estado de MéxicoTierra BlancaMexico
  4. 4.Benemérita Universidad Autónoma de PueblaJardínez de San ManuelMexico

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