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Digital Electronics - Describing Logic Circuits - Discussion

Discussion Forum : Describing Logic Circuits - General Questions (Q.No. 18)
Describing Logic Circuits
18.
A NAND gate has:
active-LOW inputs and an active-HIGH output.
active-LOW inputs and an active-LOW output.
active-HIGH inputs and an active-HIGH output.
active-HIGH inputs and an active-LOW output.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
6 comments Page 1 of 1.
EL capitan said:   9 years ago
NAND GATE has:

A B Output
0 0 1
0 1 1
1 0 1
1 1 0

And ACTIVE HIGH mean both inputs are HIGH.
(3)
M. J said:   10 years ago
Why first option is wrong?
Deepesh said:   10 years ago
Can somebody explain why first option is wrong?
KISHORE said:   9 years ago
Yeah, first answer is also right.
Sainarendra said:   7 years ago
But in practical, a gate can give low output for a high input as it can act like resistor. But you can't get high output for low input. Because from where the additional current will come.
Md Ramish Hasan said:   7 years ago
@Sainarendra.

Here the output is not in current but in voltage form. So we can get high output for a low input.
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