This filter was found in an old publication from 1977. The circuit must use a simple two-voltage source and the components can be changed for operation at other frequencies.
This circuit allows the "recovery" of weak signals recorded on tape that correspond to programs. The...
This circuit uses two JFET such as the BF244 or BF245 and has an excellent gain with small...
This simple motor control for alternating current with triac was obtained in a European...