KwickClips Computer Systems · 41 sec · free
When does NAND give 0?
Short answer. Only when all inputs are 1.
When does NOR give 1?
Only when all inputs are 0.
Universal gates
| Gate | Means | Output 1 when |
|---|---|---|
| NAND | NOT AND | not all 1 |
| NOR | NOT OR | all inputs 0 |
Remember
| Universal: builds AND, OR, NOT |
| So it builds any circuit |
Can one gate type build every circuit? Yes, NAND or NOR. NAND gives one unless all inputs are one. NOR gives one only when all inputs are zero. Two points. Universal gates build AND, OR and NOT. So they build anything.
This clip is from the full lesson: Universal Gates and Combined Logic Circuits: NAND, NOR, XOR — 8 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 11 Computer Science (083), CBSE Class 11 Computer Science Essentials (083), ISC Class 11 Computer Science (868), ISC Class 12 Computer Science (868)
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