This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.
Indicated by Texas Instruments, this 1968 circuit measures the duration of a light pulse captured...
This flip-flop using two bipolar transistor was found in a publication of the year 1968. The...
This circuit has a logarithmic response as a function of the light falling on the sensor. The...