Abstract this paper introduces novel ternary logic circuits using spintronic devices magnetoresistive spin diodes and complementary magnetic junction cmat logic architecture. Energy efficient reconfigurable threshold logic circuit. Digital electronics part i combinational and sequential. For spintronic logic gates, zgnr can be used as both devices and leads due to its spinselectivity 3,4,5 and tunability by electric field 6,7,8. Based on our expertise, we anticipate to achieve three major milestones for nextgeneration integrated logic circuits. Design, simulation, and optimization of spintronic logic devices. In this paper, new mtjbased spintronic logic units building blocks for spintronic circuits using the stt switching mechanism have been proposed and investigated, which includes the designs of a. Since ternary logic circuits can implement any function or compound logic using less gates and less circuit. Request pdf spintronic logic gates for spintronic data using magnetic tunnel junctions the emerging field of spintronics is undergoing exciting developments with the advances recently seen in. Advanced spintronic memory and logic for nonvolatile.
Spintronic logic gates for spintronic data using magnetic. Nano spiral inductors for lowpower digital spintronic circuits. Spintronic logic design methodology based on spin hall effect. Consequently the output is solely a function of the current inputs. This thus reduces the performance overheads of the spintronic circuit while also simplifying fabrication. Prospects and challenges ian young senior fellow, technology and manufacturing group, director, exploratory integrated circuits, components research intel corporation hillsboro, oregon 1 cspin workshop on heusler alloys for spintronic devices, university of minnesota, sept 3031, 2015. Device based on nonlinear response characteristics 2. Spintronics takes advantage of an intrinsic property of electrons, spin, and develops the concept of state based on magnetism, which is a physical manifestation of electron spin. Spintronic logic circuit can operate x faster than cmos. Spintronic imp logic gates material implication, pimp q or if p, then q, is a fundamental boolean logic operation which in combination with false logic 0 forms a complete logic basis to compute any boolean function.
Cascaded spintronic logic with lowdimensional carbon. Abstract this paper introduces novel ternary logic circuits using spintronic. In contrast to 1, we use mtjs as the memory elements to build spintronic imp gates. Architecture and circuit design of an allspintronic fpga. We now include not only active power, but also standby power in circuits.
We conclude that me switching results in 1 to 2 orders of magnitude improvement of switching energy and several time improvement of switching delay compared with st switching across various schemes of spin logic devices. Energy efficient reconfigurable threshold logic circuit with. We conclude that me switching results in 1 to 2 orders of magnitude improvement of switching energy and several time improvement of switching delay compared with st switching across various schemes of. Supriyo datta, purdue university may 2017 preface for over a decade, the pi has played an active role in the proposal and evaluation of a number of different approaches to reinventing the transistor in anticipation of the upcoming roadblocks. Beyondcmos device benchmarking for boolean and non.
A novel design of spintronic ternary logic circuits ijser. To design digital logic circuits, starting with simple logic gates and applying them to more design more complex digital circuits, like an alu arithmetic logic unit within the designing of more complex logic circuits, another device called a nanochannel nc needed to be designed. Emerging spintronicsbased logic technologies center for spintronic materials, interfaces, and novel architectures zhaoxin liang meghna mankalale jianping wang sachin s. These researchers invented a novel array architecture consisting of stl cells onto which complex logic. A novel design of spintronic ternary logic circuits. This realization has spurred significant research in spintronic. Hence, for future lowpower digital spintronic circuits, it is necessary. A robust and efficient mtjbased spintronic imp gate for new. Pdf in this work we propose a finitedifference scheme based circuit.
The magnetic tunnel junction mtjbased spintronic logic design is currently considered to be the most promising approach, at least in the short term. Spintronic logicinmemory paradigms and implementations. Pdf dynamic circuit model for spintronic devices researchgate. A brief survey of spintronics logic devices, gates and circuits jardcs. Sapatnekar y, and jianping wang department of computer science and engineering, university of notre dame. It can be easily seen that any logical statement based on binary logic. Recent advances in mtj technology have accelerated further research on this topic. Allcarbon spin logic permits the development of cascaded spintronic logic circuits composed solely of lowdimensional carbon materials without intermediate circuits. The mtjs are arranged in a complementary structure similar to cmos logic, with pull up and. Spintronic imp logic gates are analyzed using a spice model for spintransfer torque mtjs to demonstrate the reliability of the imp operation. With this circuit, we discuss the notion of performing logic. Design and synthesis of ultralow energy spinmemristor threshold logic.
His recent research is funded by the nih, the nsf, the department of defense breast cancer research program, the defense intelligence agency, intel and medtronic. This paper introduces a novel design of reconfigurable spintronic threshold logic gate stlg, which employs spintronic weight devices to perform. Logic and memory design using spinbased circuits electrical and. Benchmarking spintronic logic devices based on magnetoelectric oxides volume 29 issue 18 dmitri e. Through manual design of arithmetic circuits, stacking has been shown to significantly improve the energy efficiency of asl 31. Sapatnekar y, and jianping wang department of computer science and engineering, university of. The various combinations of input magnitudes and directions permit the computation of the logical or and xor operations. Diagram of the spintronic logic gate and electronic structure of a molecule analogous to the central device of the logic gate. Dataflow between devices in a welldefined direction 3. Advanced spintronic memory and logic for nonvolatile processors robert perricone, ibrahim ahmed y, zhaoxin liang, meghna g. Jul 27, 2017 figure 1 shows a logic gate based on one of these spin logic devices. Complementary magnetic tunnel junction logic cmat is a novel logic family composed solely of magnetic tunnel junctions mtjs that solves the challenge of direct cascading in spintronic logic circuits while also providing non volatile data storage 20,21. Advanced spintronic memory and logic for nonvolatile processors.
From the earliest transistor to the remarkably powerful microprocessor in your desktop computer, most electronic devices have employed circuits that express data as binary digits, or bits ones and zeroes represented by the existence or absence of electric charge. The linearity of the circuit implies that the connecting branch is described by a 4x4 spin conductance matrix. Invited feature paper benchmarking spintronic logic devices. Digital electronics part i combinational and sequential logic. Voltagedriven spintronic logic gates in graphene nanoribbons wenxing zhang 1 scientific reports volume 4, article number. Since the mtj devices are cmos compatible, the generalization of the spintronic imp gate to a largescale nonvolatile logic inmemory system is compulsory. Among these beyondcmos technologies, spintronics is one of the most promising candidates for building nextgeneration logic devices. Angizi, leveraging spintronic devices for ultralow power inmemory computing logic and neural network, in 2017 ieee 60th international midwest symposium on circuits and systems 2017, pp. The blue arrows show the direction of current flow through the nanotubes and the green circles show the magnetic field resulting from this current. This paper introduces a novel design of reconfigurable spintronic threshold logic gate stlg, which employs spintronic weight devices to perform currentmode weighted summation of binary inputs, whereas, the low voltage fast switching spintronic threshold device carries out the threshold operation in an energy efficient manner.
N2 within the field of digital logic circuits, there are special gates called threshold gates tg, which operate differently from conventional cmos logic gates. Different logic functions can be implemented by reconfiguring the weights and threshold of the same tlg circuit. Implementation of unbalanced ternary logic gates with the. However, studies of existing spintronic logic based processors e. Spintronic logic gates for spintronic data using magnetic tunnel. Keywords beyondcmos, logic, electronics, spintronics, integrated circuits, power dissipation. Ieee transactions on nanotechnology, 3 may 2014, 574583.
Young skip to main content accessibility help we use cookies to distinguish you from other users and to provide you with a better experience on our websites. Modeling and design of spintronic integrated circuits ieee xplore. A threshold logic gate tlg performs weighted summation of multiple binary inputs and compares the summation with a threshold. Exploring spintransfertorque devices for logic applications arxiv.
Most importantly, we drastically extended the functionality of benchmarking circuits, which now comprises sequential logic up to arithmetic logic units alus. Introduction electronics based on complementary metaloxide. Current pulses are passed through conducting wires which generate the necessary magnetic. Energy efficient reconfigurable threshold logic circuit with spintronic devices. Mtjbased implication logic gates and circuit architecture. Spintronic circuits usf scholar commons university of south. Circuit theory for spice of spintronic integrated circuits.
And, since spintronics, being very fast, reliable, and compact, is a very good choice for beyondcmos logic design, we have designed spintronic ternary logic circuits to harness the benefits of spintronics and ternary logic system. Twodimensional spintronic circuit architectures on large. The spintronic memristor with its resistance variation rule is discussed in section2. Later, we will study circuits having a stored internal state, i. We generalize the kirchoffs conservation laws for spin circuits to include spin dissipation 36. These switching requirements are incorporated into the previously developed benchmarking framework for spintronic logic devices and circuits. Nevertheless, current mtjbased spintronic logic circuits mainly have three intrinsic issues 11, 12. Spintronics a portmanteau meaning spin transport electronics, also known as spin electronics, is the study of the intrinsic spin of the electron and its associated magnetic moment, in addition to its fundamental electronic charge, in solidstate devices. Each of these device concepts has the potential to be a component of an integrated spintronic logic and storage device. However, it limits the feasibility that ferromagnetic electrodes and magnetic field are used in spintronic logic gates to manipulate the spin transport 9, 10, 11. Pdf spintronics also known as magneto electronics,is an emerging technology that exploits both the intrinsic spin of the electron and its associated. Spintronic devices have been proposed as logic primitives, first by using the idea of differential resistances to translate input states to an output state, and then by. You can see the graphene nanoribbon, which was formed by slitting a carbon nanotube in the center, with a nanotube on either side.
Benchmarking of beyondcmos exploratory devices for logic. Spintronic threshold logic gate and spintronic threshold. Spin logic devices are particularly amenable to building majority gates which in their turn could improve efficiency of certain circuits by reducing circuit complexity. Meanwhile, a brief comparison and analysis of six di erent ternary logic implementations are carried out in the same section.
Voltagedriven spintronic logic gates in graphene nanoribbons. T1 spintronic threshold logic gate and spintronic threshold logic array. Unlike other spintronic devices relying on majoritygate logic, mlogic devices perform computation with complementary logic circuits that are similar to cmos. Overview of beyondcmos devices and a uniform methodology for. The field of spintronics concerns spincharge coupling in metallic systems. We then extend the principles of modified nodal analysis mna 62 to spin circuits enabling netlist based spice simulations.