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We describe a highly-programmable integrated sustaining amplifier for reconfigurable MEMS-referenced oscillators. The frequency response, voltage gain, and phase shift of the amplifier can be independently controlled using bias currents, thus enabling it to be interfaced with a variety of MEMS devices with resonant frequencies in the 10–120kHz range. The chip, which was designed in 0.5μm CMOS, also...
This paper presents a review of the recent advances in Lithium Niobate (LiNbOa) micro-electro-mechanical systems (MEMS). Several types of devices and subsystems, including resonators, transformers, filters, and delay lines are discussed, targeting the different functions that are currently sought after in radio frequency signal processing for various existing and emerging applications. Technical challenges...
This work compiles the efforts made to determine and model the main damping mechanisms in Aluminum Nitride (AlN) Contour Mode Resonators (CMRs). Experiments have proved that there are two main sources of damping dominating the AlN CMR quality factor (Q) at very and ultra high frequency (V/UHF): thermoelastic damping (TED) in the metal electrodes (Qted) and anchor losses (Qanc). A semi-analytical 1D...
This paper highlights development efforts in the use of AlGaN/GaN heterostructures for launching, receiving and amplifying surface acoustic waves. High-electron mobility transistors (HEMTs) are demonstrated in acoustic wave delay lines with conventional interdigital transducers (IDTs). The amplitude for the transmitted Rayleigh mode is modulated through appropriate HEMT biasing conditions for a common...
A platform has been developed to study intercellular communication in non-neural cells as it relates to developmental biology and morphogenetic bioengineering. The versatile platform uses laminar flow in a microfluidic channel to create a “sucrose gap” that forces electrical signaling through a cell monolayer. The intercellular communication in the cell network is detected through electrical impedance...
This paper presents a monolithically implemented NFC bicycle tire pressure measurement system (BTPMS) with integrated antenna, on-chip capacitive pressure and temperature sensor, RFID interface for HF/NFC and EEPROM. This NFC BTPMS has been designed using a 130 nm standard CMOS process and has an active chip area of 5.76 mm2. It provides significant cost advantages and impresses with its large scale...
Far field radio frequency (RF) harvesting technique have become popular method to power wireless sensor network (WSN) recently. However, due to the low efficiency of RF energy harvester, RF powered WSN is unable to perform dynamic network allocation. Accordingly, the functionality of WSN is limited. This paper presents a practical RF powered wireless sensor node design that could dynamic join the...
A pre-processing algorithm for the detection of shotguns has been implemented using the General Cross-correlation (GCC) method. The relationship between Sound Pressure Level (SPL) and distance for different gunshot sounds are studied to determine whether the sound is loud enough to be detected as a gunshot at a certain distance range. The shotgun sound pattern received is made to correlate with a...
Resistive crossbar arrays show significant improvement in terms of energy and area efficiency when compared to current SRAM based memory technologies. However, due to its resistive nature, it suffers from undesired current sneak-paths complicating read-out procedures. In this paper, we present a voltage-based reading technique in resistive memories. The simplicity of the readout circuit enables parallel...
A mixed-mode analog-digital transposed 64-tap finite impulse response filter for multi-channel biomedical monitoring systems is presented. The presented architecture conducts multiplication in analog domain by taking advantage of a compact preceding multiplying-ΔΣ ADC, which is implemented by reusing the in-channel current-mode stimulating DAC. The analog domain multiplication results in a ×16.4 saving...
Organs-on-chips systems are microfluidic three-dimensional miniature human organoid models designed to reproduce the key biological and physiological parameters of their in vivo counterparts. They have recently emerged as a viable platform for personalized medicine and drug screening. While a wide variety of human organ-on-a-chip models have been created, there are limited reports on the inclusion...
Paper is a very interesting substrate material for sensing systems due to its porous nature, low cost, light weight and biodegradability. Low-cost sensing platforms can be created by combining paper substrates with low-cost printed fabrication methods. Here, recent progress is reviewed in the areas that will be needed to create powerful paper-based sensing systems: pump-free microfluidics to manipulate...
Modeling biological behaviour requires a multidisciplinary approach and very large computational resources. In this paper, we present an overview of our research work with regards to biological neuron network (NN) modeling, electrochemical reaction emulation for neurotransmitters and finite element modeling (FEM) of a very low pressure micropump for neurotransmitter concentration modulations. Three...
This paper presents a novel multimodal CMOS based biosensor consisting of integrated capacitive and thermal sensors for Lab-on-Chip applications. A new capacitive sensor is also proposed which converts the capacitance changes to frequency by using a current-controlled oscillator. This sensor works based on charge based capacitance measurement (CBCM) technique. Its operation in current mode helps this...
Emerging third-generation DNA strand-sequencers are achieving unprecedented levels of sensor speed density in a portable platform. A substantial computing effort is need to process the data from these machines in real-time. Among the processing challenges is base calling, a sequence labelling step that associates raw measurements with DNA bases. We have implemented a serial and a GPU based parallel...
Novel ultra-compact sub-10nm XOR, NOR and NAND CMOS logic circuits based on ambipolar characteristics of Schottky-Barrier (SB) FinFET devices and gate metal workfunction engineering are introduced. Use of SB source and drain contacts, high-k gate dielectrics and ultra-thin body bestows extreme short-channel immunity to the proposed FinFETs with ambipolar current-voltage characteristics. Thus, the...
This paper reviews existing reset schemes for the Muller C-element, one of the main primitives in asynchronous paradigms. Using a mathematical-based method and with the help of pass-transistor logic, an efficient implementation is developed that yields better performance. Simulations with a standard IBM 130-nm CMOS process, confirm that the proposed design achieves substantial improvement over existing...
A Look-Up Table (LUT) shows modest performance (delay and power) when used as a universal logic module (ULM) for implementing all possible combinational functions; moreover, the complete programmability of a LUT (so for all functions) incurs in a significant circuit complexity. Few approaches have been proposed by which a LUT is replaced by circuits; this is possible because in practice, the number...
This paper presents a low power AES-GCM authenticated encryption IP core which combines an improved four-parallel architecture, an advanced 65nm SOTB CMOS technology and a low complexity clock gating technique. As a result, the power consumption of the proposed AES-GCM core is only 8.9mW which is lower than other AES-GCM IP cores presented in literature. The detail implementation results are also...
The expanding use of deep learning algorithms causes the demands for accelerating neural network (NN) signal processing. For the NN processing, in-memory computation is desired, in which expensive data transfer can be eliminated. In reflection of recently proposed binary neural networks (BNNs), which can reduce the computation resource and area requirements, we designed an in-memory BNN signal processor...
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