This circuit was obtained in a 1970 EEE and applies to almost any operational amplifier. The supply voltage depends on the operational amplifiers used.
We found this circuit in an English publication of 1976. It can be easily assembled by changing the...
Following the American FCC rules, this 90s Radio Electronics circuit shows how to use a...
Found in a 90s Radio Electrconics, this circuit is an operational one with a power stage using two...