Automated Amplifier Frequency Response Tester
Journal Title: GRD Journal for Engineering - Year 2016, Vol 1, Issue 7
Abstract
With current developments in Integrated circuit technology, an approach to automatically plot the frequency response of different Audio amplifier circuits is presented in this paper. Use of specialized IC named Direct Digital Synthesizer (DDS) in programmable generation of frequency/ phase tunable output signal based on a reference clock source is incorporated. Interfacing of DDS with a microcontroller based Arduino board provides the basis of frequency generation in this project. This output from DDS is fed to test Audio amplifier circuit and the response from amplifier is recorded, voltage gain is calculated and a plot of gain versus frequency is displayed on PC by means of MATLAB graphic user interface (GUI). The aim is to replace the costlier and rigid option of Data acquisition (DAQ) card for the acquisition and display of frequency response plot on PC with microcontroller based Arduino board interfaced with MATLAB. This approach is cost effective, portable and unconstrained.
Authors and Affiliations
Arpita Awalegaonkar
Keywords
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