Found in American documentation from the 1980s, this circuit has a diode feedback. At the exit we have an indicator LED. The LM3900 is a transconductance operational amplifier.
This circuit was found in General Electric documentation from the 1980s. The circuit uses couplers...
We found this circuit on Motorola's 1993 Linear Interface ICs. Equivalent operational amplifiers can be...
The circuit in the figure is based on an LM101A; diodes can be replaced with equivalents. The...