The OR gate can be converted to the NAND function by adding----gate to the input of the OR gate?

Answer 1

Next: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates Contents

Using NAND gatesNOT

Figure 12.10: Realizing a NOT gate using a NAND gate

OR The following statements are called DeMorgan's Theorems and can be easily verified and extended for more than two variables.

(12.1)(12.2)

(12.3)(12.4)In general: (12.5)Thus :(12.6)

Now it is easy to see that , which can be checked from the truth table easily. The resulting realization of OR gate is shown in 12.11

Figure 12.11: Realization of OR gate by NAND gates

AND gateFigure 12.12: Realization of AND gate by NAND gates

X-OR gate

(12.7)

Clearly, this can be implemented using AND, NOT and OR gates, and hence can be implemented using universal gates.

Figure 12.13: X-OR gate

X-NOR gate

(12.8)

Again, this can be implemented using AND, NOT and OR gates, and hence can be implemented using universal gates, i.e., NAND or NOR gates.

Figure 12.14: X-NOR gate

Next: Boolean Expressions Up: Universality of certain gates Previous: Universality of certain gates Contentsynsingh 2007-07-25

Answer 2

A NAND gate produces as output the inversion of the AND operation on it's inputs. So, since an AND gate only has high output when all inputs are high, a NAND gate will only have low output when all it's inputs are high. The NAND gate is particularly significant because NAND is a complete set in terms of logic operations, that is, with only NAND gates, you can simulate any logic function.

Answer 3

NAND GatesThink of a NAND gate as an AND gate in series with an inverter. The output of an AND gate is True if, and only if, allthe inputs are True. Hence, the output of a NAND gate is False when all its inputs are True.

NAND gates are particularly useful in combinational logic circuits because simple AND-OR combinations can be simulated with an equal number of NAND gates alone.

Answer 4

A -> nand -> a'

b -> nand -> b'

a' b' -> nand -> a+b

Answer 5

The NAND gate's output is inverted with respect to the AND gate. NAND is short for "Not AND" or "Negated AND"

Answer 6

A NAND gate is an inverted (Negated) AND. It has a truth table as follows:

A B C

0 0 1

0 1 1

1 0 1

1 1 0

Answer 7

what are nand and nor gate

Answer 8

not