This circuit is from an ancient American documentation. The integrated circuit is 741 and the power supply must be symmetrical. The passing band is centered at 1 kHz.
This circuit produces a clef sound when a pulse is applied to its input. The damping effect is...
This VCO with a common operational amplifier was found in an old American documentation. The...
We found this circuit in a 1970 General Electric manual. The circuit uses components that are...