# question

Discussion in 'General Electronics Chat' started by dlmcknny63, May 26, 2008.

1. ### dlmcknny63 Thread Starter Member

May 25, 2008
11
0
what is the inputs of A and B if the output of a two-input NAND gate is a zero

2. ### mik3 Senior Member

Feb 4, 2008
4,846
63
The inputs may be
A=0, B=0
A=0, B=1
A=1, B=0

If the inputs are A=1, B=1 then the output is 1

3. ### dlmcknny63 Thread Starter Member

May 25, 2008
11
0
Thank You Sir...........

4. ### thingmaker3 Retired Moderator

May 16, 2005
5,072
6
Methinks there be a typo here...

5. ### SgtWookie Expert

Jul 17, 2007
22,183
1,728
No soup for you!

NAND truth table:
Code ( (Unknown Language)):
1. A B |Out
2. ----+---
3. 0 0 | 1
4. 0 1 | 1
5. 1 0 | 1
6. 1 1 | 0
[eta] No soup for me, either!

Last edited: May 26, 2008
6. ### thingmaker3 Retired Moderator

May 16, 2005
5,072
6
Methinks there STILL be typos here! No soup for either of you!

"NAND" means "NOT AND." (But you knew that.) "AND" means both i/p must be high for the output to be high. (But you knew that.) "NOT" means, we invert the output. (But you knew that, too.)

7. ### mik3 Senior Member

Feb 4, 2008
4,846
63
Ohhh!!! You are right thingmaker, he wants a NAND gate and not an AND gate. I was not very carefull and i didnt notice that. Thus the correct answer is:

You get a 1 on the output if
A=0, B=0
A=0, B=1
A=1, B=0

If the inputs are A=1, B=1 then the output is 0

I am sorry for the wrong answer dlmcknny63