This small commercial radio for the MW band with germanium transistors was found in Japanese documentation from the 1960s. The circuit is powered by a 9 V battery and has a 455 kHz IF.
This circuit was found in an old publication about transistors. The circuit can be used to drive...
Using a symmetrical source this circuit reverses the rotation of a small motor through light...
This circuit was found in a 2005 Linear Technology documentation. The circuit is based on LTC4213...