frequency doubler

5-06 — elektor may 1981 frequency double Many types of effects units are available to the contempory guitarist and their use is con- sidered the norm rather than the exception in the music of today. Of these effects, the frequency doubler is of particular interest and is fast gaining popularity with the resourceful guitarist. Unfortunately, a good frequency doubler is not the easiest of effects units to design. This is due to the fact that the output waveforms of musical instruments bear little (or no) resemblance to those in "the book". In consequence, the practical result rarely conforms to the theory. The design presented here however gives a reasonable account of itself especially when tost is taken into consideration. The basic idea of frequency doubling is essentially a good one since the resultant effect can be very desirable to the progressive musician. By far the most commonly used method of frequency doubling is full wave rectification. This principle is relatively sim...