This circuit was obtained from an 80's EDN. The components used are still common. The circuit can be used as a shield and the frequency is approximately 775 Hz.
The circuit shown in the figure can be used on a data transfer bus using an appropriate family...
The figure shows a way to apply gain control to the LM3600 OTA. The circuit is from a Radio...
This circuit is from an1966 General Electric documentation. The Triac can be equivalent to 6 A or...