This rapid response amplifier uses an integrated one that is not common today but can be implemented with modern equivalents. The circuit is from an 80's manufacturer documentation.
We found this circuit in the Audio Handbook of the National Semiconductor of 1977. The circuit leaves...
This fast-acting circuit was found in the July 1969 Radio Electronics magazine. The trigger point...
When a pulse of light reaches the sensor [a CDs cell or LDR] the flip-flop changes its state....