Efficient designs of reversible sequential circuits.

Kheirandish, Davar; Haghparast, Majid; Reshadi, Midia; Hosseinzadeh, Mehdi

Recently, the synthesis of reversible sequential circuits has attracted researchers' attention for implementing low-power logic designs. So far, the direct and replacement techniques have been used in the reversible sequential circuits design. The replacement technique leads to high quantum cost. There is the principle to look for efficient reversible circuits composed of Clifford T gates by optimizing quantum cost, the number of T gates, and particularly the T-depth of the circuit, which depends on the type and layout of the reversible gates used in the function. This paper has proposed an optimized version of direct feedback technique without any flip-flops and is performed on several samples of reversible circuits design, such as counters and shift registers. It has been shown that by partial changes in the direct technique, quantum cost and other cost metrics have been improved. It has also displayed some efficient designs of the reversible parallel-to-serial converter with parity capability and low-cost design of the control unit for a reversible self-controlled serial adder system. The analysis and comparison depict that all new proposed designs have optimized the existing works in terms of performance variables, including quantum cost, number of T gates, and T-depth of the circuit.

SEQUENTIAL circuits; LOGIC design; QUANTUM gates; SHIFT registers; FLIP-flops (Sandals); JOB performance; QUANTUM communication

Journal of Supercomputing, 2021, Vol 77, Issue 12, p13828

0920-8542

Academic Journal

10.1007/s11227-021-03735-2