Low Cost Laboratory Type Signal Generator Using DDS Method

Year 2016, Volume: 8 Issue: 4, 59 - 65, 26.12.2016

Süleyman Bilgin Yavuz Üser , Mustafa Oktay

https://doi.org/10.24107/ijeas.281464

Cited By: 1

Abstract

Everyone who is an amateur or student interested in electricity or
electronics needs a signal generator that can produce different types of signals
that must be located at the front edge. This requirement can often be met by
equipment in the laboratories or signal generators received at high prices
under the project. This study focuses on the design of a low cost signal
generator having high accuracy and sensitivity. In previous studies, DDS
(Direct Digital Synthesis) method was implemented with FPGA and other high cost
microcontrollers. With this study, the design of the high-accuracy signal
generator has been made simpler and more cost-effective thanks to the PIC
microcontroller, which can be found easily in the market. The device designed
in the study is a digital signal generator that produces sine, triangle and
square wave which are created using decimal numbers in the microcontroller and
converted to analog signal via DAC (Digital to Analog Converter). Also, the
digital potentiometer on the device, which is used as feedback in the circuit,
allows us to control the output signal. This study provides a solution for
producing a low cost laboratory type signal generator having high sensitivity,
however this solution is not a new method. Satisfactory results have been
achieved from the implementation circuit.

Keywords

Signal Generator, Direct Digital Synthesis, Phase Circle

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