This circuit was found in the 1992 Radio Electronics Handbook. It is used to test VCR recording heads. It can also be used for other purposes.
We found this circuit in a 90's EDN. The circuit is based on a control integrated that is still...
In the figure we have the way to use the transistors of an old-paired pair as a trigger circuit. The...
This very high input impedance JFET circuit was found in the 1995 Encyclopedia of Electronic...