This circuit is from a 1967 documentation. It consists of a sensor for memories used at the time. It can be made with modern equivalent transistors. Note the 4 V symmetrical power source.
This interesting application in a circuit that can be used in synchronization was found in the...
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....
We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit uses an...