The short delay makes sense, I guess it is a really short delay but it is a delay.
When a delay is not needed I don't see the point in using it this way just to use all the gates, it is faster and simpler to just ground input pins.
The short delay makes sense, I guess it is a really short delay but it is a delay.
When a delay is not needed I don't see the point in using it this way just to use all the gates, it is faster and simpler to just ground input pins.
hi,
Its also possible that the designer was thinking of sharpening the slow rise at the detector input, once he had done that he would have used the second gate as an inverter.
A better choice of IC , IMO would have been a 74LS132 , it has a Schmitt input.