What is reversible logic?

Reversible logic gates are defined as systems in which each possible set of inputs maps into a unique pattern of outputs; such systems do not lead to the generation of heat (5, 6). In these two gates, any set of inputs is processed and results as a unique pattern of outputs.

Is NAND gate reversible?

He goes on to describe the behaviour of what he calls a reversible NAND gate: It has three inputs and three outputs. Of the outputs, two, A’ and B’, are the same as two of the inputs, A and B, but the third input works this way. C’ is the same as C unless A and B are both 1, in which case C it changes whatever C is.

Why do we use reversible gates?

Abstract. Reversible logic has various applications in various field like in Nanotechnology, quantum computing, Low power CMOS, Optical computing and DNA computing, etc. The reversible logic is design,main purposes are-decrease quantum cost, depth of the circuits & the number of garbage output.

What are the reversible operators?

One clear example of a reversible operator is negation. A not gate, or N gate (where the N stands for negation), is reversible because we simply switch or flip the polarity of a state a (true to false and false to true).

Which of these gates are reversible?

A reversible logic gate is a memory-less logic element that realizes an injective logical function. Fredkin gate, Toffoli gate, interaction gate, and switch gate are typical ones. Reducing the total amount of garbage signals is an important problem in designing reversible logic circuits.

Which of the following gate is reversible?

In logic circuits, the Toffoli gate (also CCNOT gate), invented by Tommaso Toffoli, is a universal reversible logic gate, which means that any classical reversible circuit can be constructed from Toffoli gates….Background.

IS AND gate reversible?

From common logic gates, NOT is reversible, as can be seen from its truth table below. The common AND gate is not reversible, however. The inputs 00, 01 and 10 are all mapped to the output 0. Reversible gates have been studied since the 1960s.

Is NOR gate reversible?

The NOR logic based reversible gates and design methodologies based on them are still unexplored. The proposed reversible NOR gates work as a corresponding NOR counterpart of NAND logic based Toffoli gates.

Is swap gate reversible?

1 Introduction. A logic gate is a reversible gate if the output function of the gate is bijective [1]. The two most widely used reversible logic gate families are NOT-CNOT-Toffoli (NCT) and SWAP-Fredkin (SF). A SWAP gate is a (2 \times 2) reversible logic gate which interchanges the input bits at the output.

Which of these gates is reversible and universal?

Which gate is not reversible?

The gate L is reversible if there is a gate L′(y) = x which maps y to x. From common logic gates, NOT is reversible, as can be seen from its truth table below. The common AND gate is not reversible, however. The inputs 00, 01 and 10 are all mapped to the output 0.