This 80's circuit can be implemented with modern equivalent FETs with lower on resistance. The attenuation is 80 dB at 100MHz.
This is an old circuit, using operating equipment of the time, modern operational amplifiers can...
Found in a 90s Elektor, this mixer makes use of integrated circuits of the time. The supply must be...
This circuit uses a thermistor or NTC as a temperature sensor and provides the indication on an...