Development of an eprom controlled waveform generator

Abstract

The purpose of this project is to design, construct and test a waveform generator. The generator unlike usual approaches, is based on a pulse counting system which is an experimental approach. An eprom converts the counter outputs into a proper digital number and this number is the converted into an analogue waveform by a digital to analogue converter. The output can be of four types: (a)Sine wave (b)Square wave (c)Triangular wave (d) Saw-tooth wave. The output of the D/A converter is buffered so as to have a more stable outbut. There are three additional controls: (a)Variable frequency (b) Variable Gain (c) DC offset. The scope of the first two is obvious. The DC offset moves the waveform up and down the axis i.e.DC or AC. The end of the project some improvements are given to increase the outbut frequency range and to provide some other useful controls.