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.
This circuit cuts or mows an AC signal without the need for power. The transistors can be 2N2222 and...
This is the conventional version of capacitance multiplier with operational amplifier that appears in...
This transistor circuit was found in Mullard's 1960s transistor manual. The transistors are...