A5004091989- Advanced MEMS and NEMS Technologies
- Advanced Memory and Neural Computing
- Mechanical and Optical Resonators
- Magnetic properties of thin films
- Ferroelectric and Negative Capacitance Devices
- Advancements in Semiconductor Devices and Circuit Design
- Photonic and Optical Devices
- Analog and Mixed-Signal Circuit Design
- Quantum and electron transport phenomena
- Neural Networks and Reservoir Computing
- Acoustic Wave Resonator Technologies
- Neural Networks and Applications
- Semiconductor materials and devices
- Wireless Body Area Networks
- Low-power high-performance VLSI design
- Microfluidic and Bio-sensing Technologies
- Force Microscopy Techniques and Applications
- Magnetic and transport properties of perovskites and related materials
- Energy Efficient Wireless Sensor Networks
- Nanowire Synthesis and Applications
- VLSI and Analog Circuit Testing
- Quantum Information and Cryptography
- Innovative Energy Harvesting Technologies
- ECG Monitoring and Analysis
- Characterization and Applications of Magnetic Nanoparticles
King Abdullah University of Science and Technology
2016-2025
Sultan Qaboos University
2024
University of Science and Technology
2024
University of Delhi
2024
Massachusetts Institute of Technology
2008-2024
University of Malaya
2007
Exploiting the excellent electronic properties of two-dimensional (2D) materials to fabricate advanced circuits is a major goal for semiconductor industry1,2. However, most studies in this field have been limited fabrication and characterization isolated large (more than 1 µm2) devices on unfunctional SiO2-Si substrates. Some integrated monolayer graphene silicon microchips as large-area 500 interconnection3 channel transistors (roughly 16.5 (refs. 4,5), but all cases integration density was...
This work presents measured results from test chips containing circuits implemented with micro-electro-mechanical (MEM) relays. The relay designed on these illustrate a range of important functions necessary for the implementation integrated VLSI systems and lend insight into circuit design techniques optimized physical properties devices. To explore hybrid electro-mechanical model relays' electrical mechanical characteristics has been developed, correlated to measurements, then also applied...
A testchip demonstrates monolithic integration of micro-electro-mechanical (MEM) switch circuit building blocks for logic, timing, I/O and memory functions. Experimental results show functionality an inverter, XOR, carry-generation block, oscillator, DAC, latch, 10-cell DRAM.
Abstract Topologically protected spin textures, such as magnetic skyrmions, have shown the potential for high-density data storage and energy-efficient computing applications owing to their particle-like behavior, small size, low driving current requirements. Evaluating writing reading of skyrmion’s electrical characteristics is crucial implementing these devices. In this paper, we present heterostructure Hall bar device study anomalous topological signals in Using different measurement...
Pre-shaped microbeams, curved or inclined, are widely used in MEMS for their interesting stiffness properties. These mechanisms allow a wide range of positive and negative tuning direction motion. A mechanism pre-shaped beams with opposite curvature, connected parallel configuration, can be electrothermally tuned to reach near-zero behavior at the as-fabricated position. The simple structure helps incorporate tunable spring different designs accelerometers, even transduction technologies....
Abstract Spintronic devices -based on magnetic solitons, such as the domain wall motion and
the skyrmions, have shown a significant potential for applications in energy-efficient
data storage and beyond CMOS computing architectures. Based multilayer
hetero-structures, we propose skyrmion-magnetic tunnel junction
device structure, mimicking leaky integrate fire LIF neuron characteristics. The
device is controlled by spin-orbit torque-SOT driven skyrmion...
Skyrmionic devices exhibit energy-efficient and high-integration data storage computing capabilities due to their small size, topological protection, low drive current requirements. So, realize these devices, an extensive study, from fundamental physics practical applications, becomes essential. In this article, we present exhaustive review of the advancements in understanding behind magnetic skyrmions novel technologies based on them. We begin with in-depth discussion concepts such as...
IEEE 802.15.4 is the prevailing standard for low-rate wireless personal area networks. It specifies physical layer and medium access control sub-layer. Some emerging standards such as ZigBee define network on top of these lower levels to support routing multi-hop communication. Tree a favourable basis because its simplicity limited use resources. However, in data collection systems that are based spanning trees rooted at sink node, non-optimal route selection, congestion uneven distribution...
This paper describes the micro-architecture and circuit techniques for building multipliers with micro-electromechanical (MEM) relays. By optimizing circuits to suit relay device characteristics, performance of based multiplier is improved by a factor ~8× over any known static CMOS-style implementation, ~4× CMOS pass-gate equivalent implementations. A 16-bit shown offer ~10× lower energy per operation at sub-10 MOPS throughputs when compared an optimized 90 nm technology node. To demonstrate...
Magnetic skyrmion-based data storage and unconventional computing devices have gained increasing attention due to their topological protection, small size, low driving current. However, skyrmion creation, deletion, motion are still being studied. In this study, we propose a neuromorphic magnetic tunnel junction (MTJ) device with both long- short-term plasticity (LTP STP) (mixed synaptic plasticity). We showed that could be controlled by field, spin-orbit torque (SOT), the voltage-controlled...
This paper shows that due to their negligibly low leakage, in certain applications, chips utilizing power gates built even with today's relatively large, high-voltage micro-electro-mechanical (MEM) relays can achieve lower total energy than those CMOS transistors. A simple analysis provides design guidelines for off-time and savings estimates as a function of technology parameters, quantifies the further benefits scaled relay designs. Finally, we demonstrate chip successfully power-gating...
Magnetically controlled waveguide-based phase shifters are desirable for their high performance, but bulky and heavy, thus cannot be easily integrated with printed circuit board (PCB) based circuits. To tackle this, substrate-integrated waveguide (SIW) technology has been utilized, which brings the to a standard PCB, requires large numbers of vias as well multiple cavities in substrate ferrite slab placement. This implementation technique involves complex fabrication yields relatively low...
In this brief, the design principles and experimental demonstration of a compact full adder along with reprogrammable 4-input logic gate are presented. The proposed solution for implementation digital circuits is based on clamped-clamped micro-beam resonator multiple split electrodes, in which inputs tune resonance frequency beam. This technique enables re-programmability during operation, reduces complexity significantly; as an example, 64-bit adder, only 128 micro-resonators required,...
This work discusses the proposal of a spintronic neuromorphic system with spin orbit torque-driven domain wall motion (DWM)-based neurons and synapses. We propose voltage-controlled magnetic anisotropy DWM-based tunnel junction (MTJ) neuron. investigate how electric field at gate (pinning site), generated by voltage signals from pre-neurons, modulates DWM, which reflects in nonlinear switching behavior neuron magnetization. For implementation synaptic weights, we 3-terminal MTJ stochastic...
Abstract We present a magnetic tunnel junction (MTJ) based implementation of the spike time-dependent (STDP) learning for pattern recognition applications. The proposed hybrid scheme utilizes spin–orbit torque (SOT) driven neuromorphic device-circuit co-design to demonstrate Hebbian algorithm. circuit involves device structure, with domain wall motion in free layer, acting as an artificial synapse. post-spiking neuron behaviour is implemented using low barrier MTJ. In both synapse and...
This paper describes the micro-architectural and circuit design techniques for building complex VLSI circuits with micro-electromechanical (MEM) relays presents experimental results to demonstrate viability of this technology. By tailoring micro-architecture relay device characteristics, performance relay-based multiplier is improved by an order magnitude over any known static CMOS style implementation, ~4x pass-gate equivalent implementations. A 16-bit shown offer ~10x lower energy per...
Micro/nano-electromechanical resonator-based logic elements have emerged recently as an attractive potential alternative to semiconductor electronics. The next step for this technology platform make it into practical applications and build complex computing operations beyond the fundamental gates is develop cascadable units. Such units should produce outputs that can be used inputs Despite recent developments in electromechanical computing, requirement has remained elusive. Here, we...
This paper presents an improved StrongARM latch comparator, designed and simulated in 90nm 32nm CMOS technologies. The proposed design provides improvement of 7% energy efficiency, 14% speed average reduction 41% the clock feedthrough, compared to conventional design. new architecture also minimizes area by reducing required transistors needed for enhanced performance.
Beam electrothermal actuators amplify the thermal expansion of pre-shaped beams and use symmetrical structure to create a linear motion. These actuators, including V Z shapes, are widely used in microsystems. Explicit analytical expressions derived this paper governing structural deformation these due interaction with external lateral load. The developed for an arbitrary initial shape actuator symmetry uniform cross-section. modeling is based on elastic beam theory, all modes buckling...
The EEG signal is most useful for clinical diagnosis and in biomedical research. ElectroOculoGram (EOG), ElectroMyoGram (EMG) artifact are produced by eye movement facial muscle respectively. An adaptive filtering method proposed to remove these artifacts signals from signals. Proposed uses horizontal EOG (HEOG), vertical (VEOG), EMG as three reference digital filter inputs. real-time removal implemented multi-channel Least Mean Square algorithm. resulting display an accurate free feature.
Based on ferromagnetic thin film systems, spintronic devices show substantial prospects for energy-efficient memory, logic, and unconventional computing paradigms. This paper presents a multilayer device's experimental micromagnetic simulation-based realization neuromorphic applications. The device exhibits temperature-dependent magnetic field current-controlled multilevel resistance state switching. To study the scalability of applications, we further simulated scaled version system read...