This circuit doubles the frequency of an audio signal, thus changing its timbre. The circuit was found in an Elektor from the 90s. The components are common today.
The first circuit, shown in the figure, generates a stepped signal whose frequency depends on the...
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...
The purpose of this circuit is to control the high and low light of a car, detecting when a...