Harmonics Generator

Jezz Brookes jezz at enterprise.net
Fri Jan 24 10:18:16 CET 1997


The December issue of Elektor (Bumper Christmas Issue!) has a circuit on 
page 110 for a harmonics generator that looks like it might be quite 
interesting.

It uses two comparators whose output are some sort of push pull 
arrangement to supply differential signals to an adder, which cancels even 
harmonics.

They use a TLC3702 for the two comparators and a TL081 as the 
output driver. Very simple circuit.

For a sine wave input, it should generate odd harmonics but as the duty 
cycle of the input signal is changed so the output changes. For a 25% duty 
cycle, they claim you get 2nd, 6th and 10th harmonics, but no 4th. As the 
thresholds to the comparators affect the output, these could very easily 
be made CV operated.

Just thought it might interest someone.
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     Jezz @ http://homepages.enterprise.net/jezz/    
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