This ultra-low noise amplifier and simple power supply was found in Analog Devices documentation from the 90's. The circuit can be implemented with modern equivalent components.
This circuit compresses the dynamic range (amplitudes) of an audio signal. The circuit is passive and...
We found this circuit in a documentation from the 90s. It is a simple test for NPN and PNP...
This circuit is from 1995 documentation. It consists of a battery of 4 instruments driven...