Reversible flip-flop with configurable logic function and configuration method thereof

Abstract

The invention discloses a reversible flip-flop with a configurable logic function and a configuration method thereof. The reversible flip-flop comprises 7 Toffoli reversible logic gates with only onetarget bit each and 4 Fredkin reversible logic gates, wherein 4 5-bit Toffoli reversible logic gates are connected in series to form a logic function configuration circuit, 2 2-bit Toffoli reversiblelogic gates and 2 Fredkin reversible logic gates form an edge sampling and storage circuit under the control of a clock signal, the other 2 Fredkin reversible logic gates form an asynchronous settingcircuit under the control of an asynchronous setting control signal, and the remaining one 2-bit Toffoli reversible logic gate forms a logic inversion circuit; 4 control bit lines are arranged in thelogic function configuration circuit, and by configuring the connection state of the control bits respectively corresponding to each control bit line and the 4 5-bit Toffoli reversible logic gates into a switched-on state or a switched-off state, the reversible flip-flop can respectively have the logic functions of a D flip-flop, a T flip-flop and an JK flip-flop.

Description

technical field [0001] The present invention relates to a digital logic circuit, in particular to a reversible flip-flop with configurable logic function and a configuration method thereof, which are composed of Toffoli reversible logic gates and Fredkin reversible logic gates, so that the reversible flip-flop can be configured as a reversible D trigger flip-flop, reversible T flip-flop or reversible JK flip-flop. Background technique [0002] How to reduce circuit power consumption is a key point in the design of integrated circuits at present. Studies have shown that the loss of each information bit in an irreversible operation will generate KT×ln2 joules of heat, where K is the Boltzmann constant and T is the absolute temperature. The irreversibility of the logical operation process of traditional digital circuits is the main cause of power consumption; in reversible logic circuits, since the logic gates constituting the reversible logic circuit are all reversible, ideal...

AI Technical Summary

Problems solved by technology

In order to realize the conversion between different flip-flops, additional logic gates are required, and not any two types of flip-flops can be converted, such as JK flip-flops can be converted into D flip-flops, but D flip-flops cannot be converted into JK flip-flops

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