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.
This circuit produces two signals with inverted phases. One is taken for the emitter of Q1 and the...
This circuit is from an Electronic Design of the 90's. The circuit can be implemented with more...
We find this circuit in an 80's EDN. The circuit can be used with equivalent operational,...