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 has start and reset switches and can generate signals at long intervals determined by the...
This very low frequency circuit was found in a 1964 Electronic Design. Transistors may be modern...
Suggested by Linear Technology, this 80's circuit makes use of an operational of the time but can...