The low-noise amplifier shown uses a rare Raytheon operational amplifier today. The circuit can be implemented with more modern operators and the power source must be symmetrical.
The circuit is from the 1994 National Semiconductor Linear Applications Handbook but can be...
We found this circuit in a 1976 FET documentation. The circuit can be used to oscillate at other...
Found in a 90s Elektor, this circuit deactivates a source in case of excessive current. The relay...