Obtained from an Electronic Engineering of the 90s, these circuits can be applied to almost any operational amplifier. Signal shapes are given next to the diagram.
Using only one integrated circuit this control was found in an 80's Electronic Engineering. The circuit...
We found this circuit in a 1975 radio amateur documentation. The circuit uses TTL technology and...
The transistors of this circuit found in an English 1980s documentation may be the modern BC548...