| ??? 09/18/08 22:42 Read: times |
#158376 - It's semantics ... Responding to: ???'s previous message |
Erik Malund said:
Negative In / Positive Out, and vice-versa, does exist.
nope I have seen NAND gates drawn as OR gates, with inversion bubbles on the input which is the exact schematic for a negative NOR Erik OrCAD has, in the past, provided automatically generated deMorgan equivalent symbols. These substituted an OR with "bubbled" inputs for NAND, and a NOR with "bubbled" inputs for AND, among others. It still depends on your outlook. NAND: OR: (with inputs inverted) B A Y /B /A Y 0 0 1 0 0 1 0 1 1 0 1 1 1 0 1 1 0 1 1 1 0 1 1 0 To me, this looks like a standard OR with its inputs inverted, so it would be a negative OR. All logic is positive, after all. What you call things doesn't matter much, so long as (a) you define your terms and (b) you are consistent in your definitions. RE |
| Topic | Author | Date |
| negartive and positive logic ... | 01/01/70 00:00 | |
| So what?? | 01/01/70 00:00 | |
| Language??? | 01/01/70 00:00 | |
| deMorgan ... | 01/01/70 00:00 | |
| deMorgan states pos AND = neg OR | 01/01/70 00:00 | |
| Is there a contradiction here? | 01/01/70 00:00 | |
| NO!, it is a negative NOR | 01/01/70 00:00 | |
| I don't follow ... | 01/01/70 00:00 | |
| negative logic / means TRUE | 01/01/70 00:00 | |
| / means NOT | 01/01/70 00:00 | |
| Negative input NOR = Negative OR | 01/01/70 00:00 | |
| I have never heard of | 01/01/70 00:00 | |
| NAND and NOR fuzzy? | 01/01/70 00:00 | |
| nope | 01/01/70 00:00 | |
| I beg to differ | 01/01/70 00:00 | |
| Negative In - Positive Out | 01/01/70 00:00 | |
| "drawn as" | 01/01/70 00:00 | |
| It's semantics ... | 01/01/70 00:00 | |
| Assertion and Negation | 01/01/70 00:00 | |
| things have changed ... | 01/01/70 00:00 | |
| Something to live with | 01/01/70 00:00 | |
OT: Freescale | 01/01/70 00:00 |