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

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 ampl...

Full description

Saved in:
Bibliographic Details
Published in:Circuits, systems, and signal processing systems, and signal processing, 2013-04, Vol.32 (2), p.415-431
Main Authors: Sanchez Gaspariano, Luis Abraham, Gomez, Clara Iliana Martinez, Perez, Jose Miguel Rocha, Solis, Jesus Ezequiel Molinar, Pacheco, Jesus Manuel Munoz, Montero, Carlos Muniz, Sanchez, Alejandro Diaz
Format: Article
Language:English
Subjects:
Architecture
Attenuators
Circuit design
Circuits
Mathematical analysis
Operational amplifiers
Phase shifters
Waveforms
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 super() in 256 steps with a median step of 0.9 super(). 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.
ISSN:0278-081X
1531-5878
DOI:10.1007/s00034-012-9466-2