Indicated by Texas Instruments, this 1968 circuit measures the duration of a light pulse captured by a phototransistor. Equivalent phototransistors and transistors may be used.
Based on an operational of the time, this Popular Electronics circuit can be designed with any...
Using an operational amplifier, this circuit was found in the March 1996 issue of Electronics Now...
We found this high input impedance, low output impedance amplification stage in the October 1993...