wave form generator

5-34 — elektor may 1981 waveform generator Square wave, sine wave, saw tooth, triangle, symmetrical, asymmetrical ... you name it, this generator can produce them all. It is hardly surprising that such devices are so popular, for they are indispensable in the lab. This time Elektor has come up with one that can be used both in analogue and in digital technology. The main feature of this particular circuit is that it can be built with non-critical parts at low cost and yet- guarantee a highly satisfactory perform- ance. In addition, it is a vast improve- ment on its conventional counterparts. These can suffer from many disadvan- tages. The commonly used Wien oscillator, for instance, requires a stereo potentiometer to adjust the frequency. The tolerance in th is component inevitably leads to distor- tion and a further disadvantage is the fact that the amplitude tends to vary with a change in frequency. In the circuit described in this article, advantage is taken of the fact that ...