This circuit generates sinusoidal signals between 300 and 3000 Hz. We find a 303 Circuits from the 90's. The operational ones are types with FET. The power supply must be symmetrical.
This high impedance input amplifier is suitable for the use with piezoelectric sources such as...
The circuit shown is based on National Semiconductor buffers and was found in the 1994 Linear...
This circuit was obtained in a1969 magazine. The magazine no longer exists, but the circuit can be...