38 research outputs found
A new circuit technique for reduced leakage current in Deep Submicron CMOS technologies
Modern CMOS processes in the Deep Submicron regime are restricted to supply voltages below 2 volts and further to account for the transistors' field strength limitations and to reduce the power per logic gate. To maintain the high switching performance, the threshold voltage must be scaled according with the supply voltage. However, this leads to an increased subthreshold current of the transistors in standby mode (<i>V</i><sub><i>GS</i></sub>=0). Another source of leakage is gate current, which becomes significant for gate oxides of 3nm and below. </p><p style="line-height: 20px;"> We propose a <b>S</b>elf-<b>B</b>iasing <b>V</b>irtual <b>R</b>ails (SBVR) - CMOS technique which acts like an adaptive local supply voltage in case of standby mode. Most important sources of leakage currents are reduced by this technique. Moreover, SBVR-CMOS is capable of conserving stored information in sleep mode, which is vital for memory circuits. </p><p style="line-height: 20px;"> Memories are exposed to radiation causing soft errors. This well-known problem becomes even worse in standby mode of typical SRAMs, that have low driving performance to withstand alpha particle hits. In this paper, a 16-transistor SRAM cell is proposed, which combines the advantage of extremely low leakage currents with a very high soft error stability
Rate-Adaptation Based Congestion Control for Vehicle Safety Communications
This thesis deals with the scalability of Vehicle Safety Communications (VSC), where vehicles exchange periodic status messages to support future driver assistance applications. We systematically develop a design methodology for congestion control in VSC and present a resulting protocol named PULSAR. While previous works typically focused on controlling channel load only, we thereby integrate a concept which allows the adaptation to operate within the limits defined by safety applications
2.5 Gbps clock data recovery using 1/4th-rate quadricorrelator frequency detector and skew-calibrated multi-phase clock generator
A Gb/s clock and data recovery (CDR) circuit using 1/4th-rate digital quadricorrelator frequency detector and skew-calibrated multi-phase voltage-controlled oscillator is presented. With 1/4th-rate clock architecture, the coil-free oscillator can have lower operation frequency providing sufficient low-jitter operation. Moreover, it is an inherent 1-to-4 DEMUX. The skew calibration scheme is applied to reduce phase offset in multi-phase clock generator. The CDR with frequency detector can have small loop bandwidth, wide pull-in range and can operate without the need for a local reference clock. This 1/4th-rate CDR is implemented in standard 0.18 μm CMOS technology. It has an active area of 0.7 mm2 and consumes 100 mW at 1.8 V supply. The CDR has low jitter operation in a wide frequency range from 1–2.25 Gb/s. Measurement of Bit-Error Rate is less than 10−12 for 2.25 Gb/s incoming data 27−1 PRBS, jitter peak-to-peak of 0.7 unit interval (UI) modulation at 10 MHz
Cumulative Noise and 5.9 GHz DSRC Extensions for ns-2.28
The network simulator ns-2 is a widely used tool in the field of
wired and wireless communications research. Although the ns-2
implementation is in constant evolution, it fails, for obvious
reasons, to reflect all aspects related to the newest
communication technologies.
One example of such technology is 5.9GHz Direct Short Range
Communications (DSRC) for vehicular environments, which is
currently attracting attention due to its promises to reduce the
amount of road fatalities and improve vehicular traffic
efficiency on public roads. The IEEE 802.11p group is currently
developing a standard to enable future 5.9GHz DSRC based
inter-vehicle communications.
In this report, we describe the modifications realized in ns-2
in order to model more accurately future wireless communications
in vehicular environments. Section 2 reports the extensions
performed to the PHY and MAC modules in order to include
cumulative noise capabilities. Note that vehicular environments
are specially sensible to the way interferences are modeled
since safety related information will be commonly transmitted in
a broadcast fashion. Section 3 describes the adjustments
required to the MAC and PHY modules to reflect the behavior
described in the current draft of IEEE 802.11p
Design of UWB pulse radio transceiver using statistical correlation technique in frequency domain
In this paper, we propose a new technique to extract low power UWB pulse radio signals, near to noise level, using statistical correlation technique in frequency domain. The receiver consists of many narrow bandpass filters which extract energy either from transmitted UWB signal, interfering channels or noise. Transmitted UWB data can be eliminated by statistical correlation of multiple bandpass filter outputs. Super-regenerative oscillators, tuned within UWB spectrum, are designed as bandpass filters. Summers and comparators perform statistical correlation
ComunicARTE. The concept of theatre as a social transformation tool
Traballo Fin de Grao en Educación Social. Curso 2015-2016[GL] O traballo fin de grao “ComunicARTE. O teatro como ferramenta de transformación
social” xorde a raíz dun compromiso persoal coas artes e, concretamente, coa inclusión
do teatro no ámbito educativo, con especial interese na intervención con persoas con
diversidade funcional. Este traballo realízase co fin de explorar o estado da cuestión e
consolidar argumentos que avalen a inserción do teatro como ferramenta educativa.
Nunha primeira parte abórdase o marco conceptual co fin de relacionar e mobilizar
conceptos. Na segunda parte do traballo se desenvolve unha proposta de intervención
socioeducativa, ComunicARTE, contextualizada no Centro Ocupacional AMIPA de
Sorribas (Rois), na que se emprega o teatro e a potenciación da creatividade como
medio para unha mellor comunicación entre as persoas implicadas e a comunidade.
Este traballo ven a reclamar formación especializada nas diferentes artes ao longo da
traxectoria inicial das educadoras e dos educadores sociais.[ES] El trabajo fin de grado “ComunicARTE. El teatro como herramienta de transformación
social” surge a raíz de un compromiso personal con las artes y, concretamente, con la
inclusión del teatro en el ámbito educativo, con especial interés en la intervención con
personas con diversidad funcional. Este trabajo se realiza con el fin de explorar el estado
de la cuestión y consolidar argumentos que avalen la inserción del teatro como
herramienta educativa. En una primera parte se aborda el marco conceptual con el fin
de relacionar y movilizar conceptos. En la segunda parte del trabajo se desenvuelve una
propuesta de intervención socioeducativa, ComunicARTE, contextualizada en el Centro
Ocupacional AMIPA de Sorribas (Rois), en la que se utiliza el teatro y la potenciación de
la creatividad como medio para una mejor comunicación entre las personas implicadas y
la comunidad. Este trabajo viene a reclamar formación especializada en las diferentes
artes a lo largo de la trayectoria inicial de las educadoras y de los educadores sociale[EN] The final project "ComunicARTE. The concept of theatre as a social transformation tool”
arises from a personal commitment towards art and specifically with the inclusion of
theatre in education, with special attention to people with functional diversity. This work is
done in order to explore the state of this issue and strengthen arguments that guarantee
the inclusion of theatre as an educational tool. The first part deals with the conceptual
framework in order to connect and mobilize concepts. The second part of the work
unravels a proposal for socio educational intervention, comunicARTE, contextualized in
AMIPA, the occupational centre in Sorribas (Rois), in which theatre and the promotion of
creativity is used as a means for better communication among the people involved in the
community. This work requires special training in the different arts during the initial path
of the family support specialist