This circuit was obtained in documentation on medical applications from 1966. The circuit is used in electromyography by switching the electrodes used with the equipment.
Using JFETs, this circuit from a 90’s American documentation can generate signals of 0.15 Hz. The...
Found in a 1970 EEE, this circuit generates signals that depend on the C1 capacitor. Transistors are...
This watt meter was found in an old telecommunications documentation. The circuit is interspersed...