428 research outputs found
Analysis of R-2R digital-to-analog converter with equal current switching
No full textAnalysis and performance tradeoffs of an R-2R digital-to-analog converter with equal current switching are presented. It is shown that for such architecture, the active area of the DAC grows as the resolution increases due to higher matching requirement needed. A fully binary-weighted DAC suffers from well-known differential linearity problems and large switching glitches at the output, while a fully thermometer-coded DAC benefits from the relaxed DNL but requires a large area to realize. The R-2R DAC with equal current switching into the ladder network can be implemented using very low currents with more relaxed current matching requirements over the binary-weighted DAC, and less area over the thermometer-coded DAC.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-08-01The student, Mei Ling Yeoh, accepted the attached license on 2018-05-18 at 19:47.The student, Mei Ling Yeoh, submitted this Thesis for approval on 2018-05-18 at 20:26.This Thesis was approved for publication on 2018-05-21 at 10:13.DSpace SAF Submission Ingestion Package generated from Vireo submission #12583 on 2018-09-27 at 11:15:47Made available in DSpace on 2018-09-27T16:28:02Z (GMT). No. of bitstreams: 2
YEOH-THESIS-2018.pdf: 1122001 bytes, checksum: 2f22c91566626b3ca0a48509481e3fea (MD5)
LICENSE.txt: 4210 bytes, checksum: 40d13a0331b344491d8f8627070ab759 (MD5)
Previous issue date: 2018-05-21Embargo set by: Seth Robbins for item 107740
Lift date: 2020-09-27T16:28:07Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 107740
Lift date: 2020-09-27T16:30:34Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 107740
Lift date: 2020-09-27T16:31:43Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 107740
Lift date: 2020-09-27T16:34:29Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 107740 on 2020-09-28T09:15:27Z
What makes you not a Sikh? : a preliminary mapping of values
No full textThis study sets out to establish which Sikh values contrasted with or were shared by non-Sikh adolescents. A survey of attitude toward a variety of Sikh values was fielded in a sample of 364 non-Sikh schoolchildren aged between 13 and 15 in London. Values where attitudes were least positive concerned Sikh duties/code of conduct, festivals, rituals, prayer Gurdwara attendance, listening to scripture recitation, the amrit initiation. Sikh values empathized with by non-Sikhs concerned family pride, charity, easy access to ordination and Gurdwaras, maintaining the five Ks, seeing God in all things, abstaining from meat and alcohol and belief in the stories of Guru Nanak. Further significant differences of attitude toward Sikhism were found in comparisons by sex, age and religious affiliation. Findings are applied to teaching Sikhism to pupils of no faith adherence. The study recommends the extension of values mapping to specifically Sikh populations
IEEE 2006 Custom Intergrated Circuits Conference (CICC) A 0.6V Highly Linear Switched-R-MOSFET-C Filter
No full textAbstract — The design and performance of a switched-R-MOSFET-C filter is presented in this paper. The filter achieves-77dB THD using a 0.6V supply, and-90dB THD using a 0.8V supply, with a 0.6Vpp differential 2kHz sine input. High linearity at a low supply voltage is achieved by the use of duty-cycle controlled tuning inside a feedback loop. I
Ring oscillator based injection locked clock multiplier
No full textThis thesis describes a ring-based injection locked clock multiplier (ILCM) designed with the goal of generating a high-frequency and low-jitter clock. Building on prior research done on injection locking, this design uses a reference frequency doubling technique to push the noise bandwidth of the circuit to Fref/3 to suppress DCO noise to a large extent. A background duty cycle error correction technique is employed to correct errors on the doubled clock that could be detrimental to performance. The design also modifies an existing architecture to achieve type-II suppression of DCO noise in order to fully suppress the flicker noise which becomes prevalent in low process nodes. The prototype ILCM was fabricated in TSMC 65 nm CMOS technology. Thorough testing was performed to characterize the effectiveness of the aforementioned techniques. The circuit achieves 340 fsrms integrated jitter when operating at 5 GHz while only consuming 5.3 mW of power. The ILCM's figure of merit, -242.4 dB, is on par with state-of-the-art ring-based clock multipliers while operating at a much higher output frequency and multiplication factor than previously published work. These results indicate the effectiveness of reference frequency doubling in a ring-based, high-performance clock multiplier design.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01The student, Daniel Coombs, accepted the attached license on 2017-04-19 at 12:30.The student, Daniel Coombs, submitted this Thesis for approval on 2017-04-19 at 12:40.This Thesis was approved for publication on 2017-04-24 at 10:52.DSpace SAF Submission Ingestion Package generated from Vireo submission #10900 on 2017-08-10 at 15:06:19Made available in DSpace on 2017-08-10T20:33:10Z (GMT). No. of bitstreams: 2
COOMBS-THESIS-2017.pdf: 17117986 bytes, checksum: ec7fe0620eeacc03b10280f599707f12 (MD5)
LICENSE.txt: 4210 bytes, checksum: 3feb9e22d7156ccc8e8a990434f3b166 (MD5)
Previous issue date: 2017-04-24Embargo set by: Colleen Fallaw for item 102797
Lift date: 2019-08-10T21:27:21Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 102797 on 2019-08-11T09:15:32Z
R&D in Cleaner Technology and International Trade
No full textWe consider a dynamic three-stage game played by two regulator-firm hierarchies to capture the scale and technological effects of opening markets to international trade. Each firm produces one good sold on the market. Firms can invest in R&D in order to lower their fixed emission/output ratio and are regulated with costly public funds. We take the context of sufficiently high market sizes and investment cost parameters. Opening markets to international trade yields more investment in R&D, more production and a lower emission ratio. When the market size is low enough and the investment cost parameter is high enough, pollution in common market is higher than in autarky. International trade reduces the social welfare.R&D, Cleaner technology, Common market, Social welfare
A Dynamic Silver(I) Nanocluster Holds Together a 3 × 3 Self-Assembled Grid
No full textMetal ions with well-defined coordination geometries can serve as fixed joints within self-assembled architectures, defining the relative orientations of ligands within higher-order superstructures. The exchange of ligands and metal ions between different positions is slow, involving disruption or distortion. Here we report a series of AgI12X4L6 3 × 3 metal–organic grid-like structures, where the core AgI12X4 nanocluster is in dynamic motion, with AgI ions moving between different binding sites, with concomitant conformational changes of the organic ligands, which continue to occupy well-defined positions nevertheless. The identity of the incorporated halide anion governs the activation barrier for silver ion exchange, thus enabling rate control in response to two distinct stimuli: by changing the temperature, and by exchanging one halide for another. The dynamic nanocluster within these grids thus provides a new mode of using metal ions in coordination-driven self-assembly, establishing that the mobile AgI ions behave in similar ways to Ag0 atoms in surface-bound clusters and in silver nanoparticles. The kinetic parameters determined in this work, and the techniques developed to measure them, could serve the scientific community to provide additional insight into dynamic metal nanoclusters
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