sine-wave oscillator

11-34 — elektor november 1981 sine-wave oscillator very low distortion. L. Boullart Nowadays, an entire function generator can be constructed from a few simple ICs. When measuring low-frequency equipment, such as audio amplifiers, it is highly desirable to use a low distortion, reliable sinewave generator. This particular design is not at all complicated as far as construction is concerned and yet it boasts a distortion level of only 0,01%! lts frequency range extends from 10 Hz up to an inaudible 100 kHz and is very simple to operate. a uo R c Rc m u, Where modern HiFi equipment — especially the home-constructed kind — is concerned, accurate measure- ments are almost impossible to carry out. Although frequency characteristics and squarewave signals can be checked, there is little that can be done towards measuring the actual distortion level, that is, assuming the unit is properly built and the amplifier is working correctly. Fortunately, most up-to-date designs are so good...