This ultra-low noise amplifier and simple power supply was found in Analog Devices documentation from the 90's. The circuit can be implemented with modern equivalent components.
The coil consists of 100 turns of wire 28 in a wooden or PVC tube from 2 cm to 2.5 cm in diameter with...
The circuit shown in the figure can drive a motor (or other type of load) for a time interval that...
This circuit is from a 1966 Motorola Field Effect Transistors Manual. The circuit makes use of...