This circuit was found in an old American publication. It is valid for any operational. Formulas for component calculations are given next to the diagram.
We found this circuit in an old Linear Technology manual. It makes use of the LTC1329 and can be...
We found this circuit in an English documentation from the 80's. Transistors are general-purpose types....
Found in a 1960s documentation, this circuit uses a transistor to drive a relay as well as a set...