In the figure we have a circuit of an analog computer published in the Radio Electronics magazine of June 1958. Accuracy depends on the components used, mainly the potentiometers.
This old 1967 audio preamp uses germanium transistors. It was found in Japanese documentation at...
In the figure we have the conventional configuration of a filter that allows only the frequencies above...
This circuit is from a 1995 Electronics Now. It generates a 1 kHz sinusoidal signal. See in the...