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Explanation:
The NAND (Not – AND) gate has an output that is normally at logic level “1” and only goes “LOW” to logic level “0” when ALL of its inputs are at logic level “1”. The Logic NAND Gate is the reverse or “Complementary” form of the AND gate we have seen previously.
Logic NAND Gate Equivalence
logic nand gate
The logic or Boolean expression given for a logic NAND gate is that for Logical Addition, which is the opposite to the AND gate, and which it performs on the complements of the inputs. The Boolean expression for a logic NAND gate is denoted by a single dot or full stop symbol, ( . ) with a line or Overline, ( ‾‾ ) over the expression to signify the NOT or logical negation of the NAND gate giving us the Boolean expression of: A.B = Q.
Then we can define the operation of a 2-input digital logic NAND gate as being:
Explanation:
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Please help me to understand questions using * had been* at the start. If i want to as question about past the can i ask this way? I am aware about uses of were and was that it use to ask about status of past. Below sentences are in perfect tense give clear picture of time. Past time before any other thing happen.
Had you been to Australia?
Had she been upset?
Had you been to school?
Had you been hospitalized?
Had he been arrested by police