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.
We found this circuit in an EDN from the 90s. The circuit is a voltage quadruplicator using...
This circuit is from LinearTechnology Applications of 1997. The circuit uses components of the...
In the figure we have a basic double T filter with components that must maintain a specific range...