Quasiadiabatic switching for metal-island quantum-dot cellular automata

Tóth, G.; Lent, Craig S.

doi:10.1063/1.369063

Cited by 219 publications

(82 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, molecules can be massively produced by self-assembly method. The introduction of the clocking scheme [7] addressed the power gain problem of QCA circuits. A weak input signal can be restored by the clocking signal.…”

Section: Introductionmentioning

confidence: 99%

Electric field measurement for quantum‐dot cellular automata clocking circuits

Yan

2008

Surface & Interface Analysis

View full text Add to dashboard Cite

Bistable molecules under electric field are being investigated for the concept of quantum-dot cellular automata (QCA). Different configurations of molecular arrays implement various logic devices and circuits. The electric field emitted from underlying metal wires, which are applied with clock signal, not only enables power gain, but also fulfills pipelining computation. It might be convenient to measure the electric field distribution directly from these metal wires. A pseudo-quantitative method was developed to map the electric field distribution with electrostatic force microscopy. This method converts the phase signal into the electric field intensity, by which we demonstrated how to use a particular electric field distribution to drive the computation of QCA molecules.

show abstract

Section: Introductionmentioning

confidence: 99%

Electric field measurement for quantum‐dot cellular automata clocking circuits

Yan

2008

Surface & Interface Analysis

View full text Add to dashboard Cite

show abstract

“…In this type of clocking, all the cells in a particular clocking zone are grouped and connected to one of clocking zones maintaining the clock phases in order [22]. This arrangement is illustrated in Figure 2 Continuous clocking: In Continuous clocking, the potential field to enable clocking is generated by a system of electrodes submerged under the cell layer.…”

Section: Zone Clockingmentioning

confidence: 99%

Logic Realization Using Regular Structures in Quantum-Dot Cellular Automata (QCA)

Singhal¹

2000

View full text Add to dashboard Cite

Semiconductor industry seems to approach a wall where physical geometry and power density issues could possibly render the device fabrication infeasible. Quantum-dot Cellular Automata (QCA) is a new nanotechnology that claims to offer the potential of manufacturing even denser integrated circuits, which can operate at high frequencies and low power consumption. In QCA technology, the signal propagation occurs as a result of electrostatic interaction among the electrons as opposed to flow to the electrons in a wire.The basic building block of QCA technology is a QCA cell which encodes binary information with the relative position of electrons in it. A QCA cell can be used either as a wire or as logic. In QCA, the directionality of the signal flow is controlled by phaseshifted electric field generated on a separate layer than QCA cell layer. This process is called clocking of QCA circuits.The logic realization using regular structures such as PLAs have played a significant role in the semiconductor field due to their manufacturability, behavioral predictability and the ease of logic mapping. Along with these benefits, regular structures in QCA"s would allow for uniform QCA clocking structure. The clocking structure is important because the pioneers of QCA technology propose it to be fabricated in CMOS technology. This thesis presents a detailed design implementation and a comparative analysis of logic realization using regular structures, namely Shannon-Lattices and PLAs for QCAs. A software tool was developed as a part of this research, which automatically generates complete QCA-Shannon-Lattice and QCA-PLA layouts for single-output Boolean ii functions based on an input macro-cell library. The equations for latency and throughput for the new QCA-PLA and QCA-Shannon-Lattice design implementations were also formulated. The correctness of the equations was verified by performing simulations of the tool-generate layouts with QCADesigner. A brief design trade-off analysis between the tool-generated regular structure implementation and the unstructured custom layout in QCA is presented for the full-adder circuit.iii

show abstract

“…Four clock signals are adequate to control the propagation of information in a QCA circuit [8] [9]. These clocks synchronize as well as control the information propagation.…”

Section: Clocking Schemementioning

confidence: 99%

Design of a Novel Reversible Arithmetic Circuit using QCA

Jain¹

2014

IJCA

View full text Add to dashboard Cite

Reversible logic is one of the flourishing importance to many futuristic technologies. A reversible circuit maps each input vector into a unique output vector. There should not be any information loss in the circuit, because it is proved that each irreversible bit operation dissipate kTln2 amount of energy, but there are so many fields such as cryptography, optical computing, DNA computing etc., where such kind of information loss augments the heat dissipation. As the circuits are getting more compact, soon a limitation to Moore's Law will be reached hence further no more transistors can be mounted on a single chip. Therefore the next era of technology is transistor less circuit, in which the same operations which are performed now using transistors will be processed at atomic or molecular level using transistor less technique i.e. Quantum Dot Cellular Automata. A novel Reversible Gate RSG is proposed which is designed using QCA. RSG gate outperforms existing reversible gates in terms of garbage outputs and multi functionality.

show abstract

Quasiadiabatic switching for metal-island quantum-dot cellular automata

Cited by 219 publications

References 13 publications

Electric field measurement for quantum‐dot cellular automata clocking circuits

Electric field measurement for quantum‐dot cellular automata clocking circuits

Logic Realization Using Regular Structures in Quantum-Dot Cellular Automata (QCA)

Design of a Novel Reversible Arithmetic Circuit using QCA

Contact Info

Product

Resources

About