NOR logic gate question. Pulse does not go through the gate?

Question

If one input is high and there is a positive pulse on the other input will the pulse go through the logic gate?

As I know, normally in the positive logic NOR gate if all inputs are low the output is high. If any of the inputs high then the output is low.

I am checking a digital circuit with an oscilloscope now and the pulse does not come through the gate. One input is high and there is a positive pulse on the other input. Please, give the answer and expalin why. Thank you very much.

Answer 1

Bill is right. If you have any positive input on the gate it will always be low.

AB | C

00  | 1

01  | 0

10  | 0

11  | 0  not 1.. that would be an XNOR

Answer 2

no, the high input says the output will always be low.

You know how a NOR gate works. If either input is high, the output is low. One input is high, so the output is low. It is working properly.