4,597 research outputs found
Digital-based analog processing in nanoscale CMOS ICs for IoT applications
No full textOver the past two decades, it is evident that there have been significant improvements (and it is expected to) in CMOS digital circuits when compared against analog building block performance.
Digital circuits have been taking advantage of CMOS technology scaling in terms of speed, power consumption, and cost, while the techniques running behind the analog signal processing are still lagging. There has been an increasing trend in finding alternative IC design strategies to implement analog functions exploiting digital-in-concept design methodologies to decrease this historical gap.
This idea of re-thinking analog functions in digital terms has shown that Analog ICs blocks can also avail of the feature-size shrinking and energy efficiency of new technologies. This poster shows the advanced of this field in the above scenario, proposing new digital-based analog blocks and proving their performance through silicon measurements
Modelo do descasamento (Mismatch) entre transistores MOS: [tese]
No full textTese (Doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Engenharia ElétricaDiversos modelos teóricos para o descasamento entre dispositivos na tecnologia MOS foram propostos desde a década de '80, sendo que geralmente estes pecam ou pela simplicidade, sendo válidos apenas sob condições de operação específicas, ou por resultarem em expressões muito complexas, o que torna necessário o uso de pesados recursos computacionais. Esta tese propõe uma abordagem inovadora para a modelagem do descasamento dos transistores de efeito de campo de porta isolada (MOSFETs), chegando a resultados melhores e mais abrangentes que outras propostas já publicadas. Para tanto, as variações microscópicas na corrente que flui pelo dispositivo, resultado das flutuações na concentração de dopantes na região ativa, são contabilizadas levando-se em conta a natureza não-linear do transistor. O resultado é um modelo compacto que prevê o descasamento com grande exatidão e de forma contínua, em todas as condições de operação do transistor, da inversão fraca à forte, e da região linear à saturação, necessitando apenas dois parâmetros de ajuste. Duas versões de circuitos de teste foram desenvolvidas e implementadas em diversas tecnologias, como forma de se obter suporte experimental para o modelo. A versão mais avançada possibilita a caracterização elétrica, de forma totalmente automática, de um grande número de dispositivos. O uso deste modelo substitui com vantagens a tradicional simulação Monte Carlo, que exige grandes recursos computacionais e consome muito tempo, além de oferecer uma excelente ferramenta de projeto manual, como é demonstrado através do desenvolvimento de um conversor digital-analógico, cujo resultado experimental corroborou a metodologia empregada
Hamilton, Catherine Jane [pseud. Retlaw Spring] (1841–1935), author and journalist
No full textHamilton, Catherine Jane [pseud. Retlaw Spring] (1841-1935), author and journalist, was born on 25 January 1841 at Kilmersdon, Somerset, where she was baptized on 12 April 1841, the younger of two daughters of Richard Hamilton (1805?-1859), vicar of Kilmersdon, and his wife Charlotte, née Cooper (1809-1882), the fifth daughter of William Cooper, of Queens County, Ireland. She was of Irish heritage on both sides. Her father belonged to a military family with roots in Strabane (county Tyrone) - his father, John Hamilton, and her father’s four older brothers were all officers in the Fifth Foot – and was a graduate of Trinity College Dublin. He had been a bright scholar with an aptitude for languages, and as a preacher was praised for his powerful sermons and his ability to bring the Bible to life for his parishioners
Dynamic and Static Calibration of Ultra-Low-Voltage, Digital-Based Operational Transconductance Amplifiers
No full textThe calibration of the effects of process variations and device mismatch in Ultra Low Voltage (ULV) Digital-Based Operational Transconductance Amplifiers (DB-OTAs) is addressed in this paper. For this purpose, two dynamic calibration techniques, intended to dynamically vary the effective strength of critical gates by different modulation strategies, i.e., Digital Pulse Width Modulation (DPWM) and Dyadic Digital Pulse Modulation (DDPM), are explored and compared to classic static calibration. The effectiveness of the calibration approaches as a mean to recover acceptable performance in non-functional samples is verified by Monte-Carlo (MC) post-layout simulations performed on a 300 mV power supply, nW-power DB-OTA in 180 nm CMOS. Based on the same MC post-layout simulations, the impact of each calibration strategy on silicon area, power consumption, and OTA performance is discussed
Low-Voltage, Low-Area, nW-Power CMOS Digital-Based Biosignal Amplifier
No full textThis paper presents the operation principle and the silicon characterization of a power efficient ultra-low voltage and ultra-low area fully-differential, digital-based Operational Transconductance Amplifier (OTA), suitable for microscale biosensing applications (BioDIGOTA). Measured results in 180nm CMOS prototypes show that the proposed BioDIGOTA is able to work with a supply voltage down to 400 mV, consuming only 95 nW. Owing to its intrinsically highly-digital feature, the BioDIGOTA layout occupies only 0.022 mm2 of total silicon area, lowering the area by 3.22X times compared to the current state of the art, while keeping reasonable system performance, such as 7.6 NEF with 1.25 μVRMS input referred noise over a 10 Hz bandwidth, 1.8% of THD, 62 dB of CMRR and 55 dB of PSRR
-Area, 0.2-PEF Digital-Based Biomedical Signal Amplifier in 180nm CMOS
No full textThis paper presents a power-efficient Ultra Low Voltage (ULV) Fully-Differential (FD) Digital-Based Operational Transconductance Amplifier for Biomedical signal processing (BioDIGOTA), which digitally processes biological analog signals using CMOS standard-cells. Post-layout simulations, including parasitic effects in 180nm CMOS technology, show that BioDIGOTA consumes only 144 nW at 300 mV of supply voltage while driving a 20pF capacitive load, with a power efficiency factor (PEF) lower than 1. The layout uses 0.03 mm2 of the total silicon area, excluding I/0 pads. The proposed BioDIGOTA proves that digital-based analog design can be adopted in biomedical signal amplifiers, lowering the total silicon area by 2.3X times compared to the current state of the art landscape while keeping reasonable power and system performance
Jazz Tales from Jazz Legends: Oral Histories from the Fillius Jazz Archive at Hamilton College
No full textDistills an oral history project that began in 1995 under the auspices of the Fillius Jazz Archive at Hamilton College in Clinton N.Y. Excerpts drawn from 325 one-on-one sessions conducted for the Archive are organized into categories including first-hand accounts of life on the road, inspiration, race and jazz, improvisation, and work inside the studios. Interviewees quoted in the book include icons in jazz world such as Joe Williams, Dave and Iola Brubeck, Jon Hendricks, Steve Allen, and Marian McPartland. Stories from unsung sidemen offer a rare perspective on the life and times of jazz artists who balance the love of music with the sacrifice inherent in the jazz lifestyle. The author provides informative commentary with personal insights into the accomplishments and personalities of over one hundred jazz artists.
209 pages with 13 black and white illustrationshttps://digitalcommons.hamilton.edu/books/1066/thumbnail.jp
A 300mV-Supply, 2nW-Power, 80pF-Load CMOS Digital-Based OTA for IoT Interfaces
No full textThis paper presents a power-efficient Ultra Low Voltage (ULV) Digital-Based Operational Transconductance Amplifier (DB-OTA), which uses static logic gates and processes
digitally the analog input signal. Post-layout simulations in 180nm CMOS technology show that at 300mV supply voltage the circuit consumes just 2nW while driving a capacitive load of 80pF with Total Harmonic Distortion lower than 5% at 100mV input signal swing. The total silicon area is 1,426 μm2. The maximum energy efficiency supply for the DB-OTA and its scalability to 40nm CMOS technology node are also demonstrated
The Dealings of a Few of the Church at York Who Call Themselves Christians, with Samuel Junkins and His Wife: Together with a Short Sketch of Her Own Christian Experience, Written by Her Own Hand
No full textReprint of a pamphlet promoting beliefs associated with the Cochranites, or the Society of Free Brethren (1816-1819). Printed [in York, Maine?] for the author in 1825, and recently acquired by Hamilton College
The built environment, Hamilton City Council policies and child driveway safety: a balancing act
No full textDriveway run-overs continue to bring tragedy to New Zealand families at a higher rate than any other Western nation. Meanwhile, little progress appears to have been made in regard to the recommendations of previous research. This project investigates whether recommendations in regard to one key factor in driveway run-overs, the built environment, are reflected in current local body policies and regulations. The research evaluates Hamilton City Council policies affecting the renovation and/or erection of domestic residences with a view to determining whether they are consistent with existing knowledge and best practice initiatives designed to minimise accidental injuries to children on driveways.
The project compares the findings of a review of the existing literature on child safety best practice for the built environment and urban design of driveways, with a review of Hamilton City Council policies and guidelines relating to the built environment of residential properties and adjacent roads (the Operative District Plan, Ten Year Plan, Urban Growth Strategy, Vista, and more), along with relevant central government policy. These findings are triangulated with data from interviews with four expert informants – one child safety expert and three Hamilton City Council employees involved in planning, policy and transport – who provide insights into the translation of policies into practice
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