Suggested by Linear Technology in documentation from the 90s, this circuit uses a company component available at the time. See if there are current equivalents.
Indicated by Texas Instruments, this 1968 circuit measures the duration of a light pulse captured...
We found this circuit in an old English documentation. The integrated circuit is of a specific type of...
We found this circuit in a 1975 publication. The circuit can be made with more modern equivalent...