Found in 90's Electronic Engineering this circuit can be used to measure phase angles between two signals from 0 to 180 degrees. The components used admit modern equivalents.
This circuit can generate signals from 2 to 15 MHz or 4 to 22 MHz depending on the used components...
This interesting configuration was found in a 1965s Electronic Design. It makes use of components of...
The figure shows how to obtain a digitally programmed resistance using the 4066. The circuit is...