This circuit was found in a 1965 General Electric documentation. It is intended for reception of the aviation strip, but inside an aircraft or nearby (which is now prohibited).
Equivalent operational amplifiers can be used in this circuit of the 1990 Linear Databook,...
The SN76477 integrated circuit of the 1980s was a great success as a sound effects generator. Many...
This circuit for light data transmission (visible or IR) has a maximum speed of 1 Mbps and can be...