This circuit is from an American manual from 1975. The transistors are types of the time, but equivalents can be used, as well as the relay that can be according to the supply voltage.
We obtained this circuit in a Maxim documentation from the 90s. The circuit is based on the...
This circuit is from Signetics' 80s documentation. The circuit generates 100 kHz signals according...
This unit gain circuit has a very low output impedance. The circuit is of the Linear Databook of...