This circuit was suggested by Sprague Electric in an 80's documentation. The circuit uses a tachometric sensor for feedback. The current was not indicated in the original documentation.
The integrated circuit used in this configuration is not very common today. However, more modern...
This small Hartley oscillator uses an output transformer for transistors. The frequency is...
This circuit was found in a 90’s EDN. The components used are still common and the sensors can have...