Magnitude Comparator Research Articles

Design and Simulation of a Small Power Two-Bit MC Circuit via Full Adder Logic

In Very Large-Scale Integration (VLSI) systems, a magnitude comparator (MC) is a component of Arithmetic Logic Unit (ALU) used to make binary decisions. Recent technologies demand the use of power-efficient methodologies as well as techniques that require a lesser number of transistors. In this paper, a magnitude comparator is developed using full adder design logic. Full adders are basic components of the ALU which is the logical and arithmetical unit of the microprocessors and Digital Signal Processing (DSP). This design consumes less power and area when compared to other logic styles in the literature. The proposed comparator has been designed using DSCH 3.5 and simulations are done on Microwind 3.5 via 0.12 μ technologies. This comparator shows a power consumption of 31.746μW using 36 transistors. The proposed design exhibits a full adder logic-based comparator with less power consumption and transistor count as compared to those in recent literature.

High-Performance Spintronic Nonvolatile Ternary Flip-Flop and Universal Shift Register

Multiple-valued logic (MVL) shows considerable advantages over binary logic in certain applications because of the increased informational content of its signals, and hence reduction in interconnects. Flip-flops (FFs) are the basic elements of many systems and are widely used in microprocessors due to their high performance. This article presents two spintronic ternary retention FFs, and a nonvolatile universal ternary shift register (NUTSR) based on gate-all-around carbon nanotube field-effect transistors (GAA-CNTFETs) and nonvolatile magnetic tunnel junction (MTJ). In the proposed input-aware ternary retention FF circuit, power consumption is significantly reduced by adding a magnitude comparator (MC) circuit and preventing duplicate data transfer to MTJs. Simulation results indicate that our design offers at least 22%, 40%, and 15% reductions in power consumption, backup time, and restore energy, respectively. Moreover, it eliminates the risk of data loss in the event of a sudden power outage.