This amplifier, from Philips Databook is suitable for automotive applications. The input resistance is 60k ohms and the frequency range is 20 to 20 kHz.
The integrated circuit used in this Electronics Now amplifier is not very common today. However,...
Found in a 90s Popular Electronics, this mixer can be expanded to more channels. Transistors can be...
The circuit shown in the figure is indicated for alternative energy sources, such as those...