This 1967 General Electric circuit makes use of an array of 3 (integrated) transistors for an amplifier stage. The circuit has a 500 mV output.
This simple logic level tester was found in Radio Electronics from the 90s. The inverters are of...
The low-noise amplifier shown uses a rare Raytheon operational amplifier today. The circuit can be...
This circuit, found in American documentation, works as a voltage doubler, enabling the supply of a...