This circuit was found in Raytheon's 1967 documentation. The circuit uses an operating of the era, but the configuration can be applied to modern operational amplifiers.
This circuit generates sine low-frequency signals. The frequency depends on the twin-T network....
This circuit generates quadrature signals, that is, with a 90-degree phase difference. The circuit...
The circuit in the figure operates at frequencies from 4 to 20 MHz and also uses a common junction FET...