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GATE > Learn GATE Coaching > What is the difference between AND gate and NAND gate?
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What is the difference between AND gate and NAND gate?

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Digital logic only uses 2 voltage levels, at or near supply voltage(high logic state) & ground or zero(low logic state). These states = "yes" or "no" or "on" or "off". On a AND gate, if there's 1 low input , it has a low output. This doesn't change until there's 2 high inputs, at which time the output...
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Digital logic only uses 2 voltage levels, at or near supply voltage(high logic state) & ground or zero(low logic state). These states = "yes" or "no" or "on" or "off". On a AND gate, if there's 1 low input , it has a low output. This doesn't change until there's 2 high inputs, at which time the output is high. AND gate A + B = output L+ L =L L+H= L H+L= L H+H=H .......A NAND gate is the opposite. NAND gate A+B= output L+L=H L+H=H H+L=H H+H=L read less
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AND gate is basic logic gate and NAND gate is universal gate. Negation of AND gate is NAND gate.
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