This circuit was found in an old Electronic Design. It makes use of sidacs and operational not very common today. The power supply must be symmetrical.
This 10 kHz filter was obtained from an article in Electronics Now magazine in February 1995. The...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We found...
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...