We found this circuit in the April 1992 issue of Radio Electronics magazine. The circuit uses an operating system that requires a symmetrical power supply.
September 2016 - It can be purchased from Mouser Electornics the iW1818 of Dialog Semiconductor, a...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
Figure Bellow shows how to use a 7490 (TTL) IC to divide the frequency of a TTL signal by 6; The...