This circuit was found in a 1964 Electronic Design. The transistors are of the time, but can be employed as modern equivalents. The system is for car with contact breaker.
We found this circuit in documentation from the 90s. It is a common configuration that is given in two...
The diagram shows an AND gate implemented with an LM3900 transconductance operational. The circuit is...
In the figure we have the conventional configuration of a differential amplifier with the...