Luis Guerrero

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—This paper presents a flexible 1.2-V 90-nm CMOS cascade three-stage SC Σ∆ modulator with local resonation in the last two stages, unity signal transfer function and programmable (either 3 or 5 level) quantization in all stages. The chip reconfig-ures its loop filter order (2nd, 4th, 6th order), the clock frequency (from 40 to 240MHz) and scales the power(More)
There is a real need to have systems for people with visual disabilities to be able to improve their orientation and mobility skills, and especially for children to be able to improve their autonomy into the future. However, these systems must be designed according to available objectives, methodologies and resources, as well as by taking the interests and(More)
Teaching children with intellectual disabilities is a big challenge for most parents and educators. Special education teachers use learning strategies to develop and enhance motivation for complex learning tasks. Literacy acquisition is an essential and life-long skill for a child with intellectual disabilities. In this context, technology can support(More)
  • Anne Braun, Lilibeth Dofiles, Serge Rousselle, Luis Guerrero, Jane Gunther, Ted Yednock +2 others
  • 2010
Restenosis remains the main complication of balloon angioplasty and/or stent implantation. Preclinical testing of new pharmacologic agents preventing restenosis largely rely on porcine models, where restenosis is assessed after endothelial abrasion of the arterial wall or stent implantation. We combined endothelial cell denudation and implantation of stents(More)
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