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.
In the figure we show how to implement a voltage reference with the ON Semiconductor rail-to-rail...
This circuit is from a technical documentation from 1978. The maximum output current is of the...
This RF and audio follower applies its signals to a small amplifier. The FET can be any...