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Enhanced-accuracy oversampled data converters

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dc.contributor Temes, Gabor
dc.contributor Temes, Gabor
dc.contributor Moon, Un-Ku
dc.contributor Magana, Mario
dc.contributor Lucchese, Luca
dc.contributor Guenther, Ron
dc.date 2005-10-24T15:10:32Z
dc.date 2005-10-24T15:10:32Z
dc.date 2005-10-11
dc.date 2005-10-24T15:10:32Z
dc.date.accessioned 2013-10-16T07:27:45Z
dc.date.available 2013-10-16T07:27:45Z
dc.date.issued 2013-10-16
dc.identifier http://hdl.handle.net/1957/531
dc.identifier.uri http://koha.mediu.edu.my:8181/xmlui/handle/1957/531
dc.description Graduation date: 2006
dc.description Digital-to-analog converters (DACs) suffer from static and dynamic nonlinearity problems, which degrade their accuracy and performance. Mismatch errors in the analog components restrict the maximum achievable linearity. This thesis presents various techniques for correcting these errors. It describes a correction process for the nonlinear behavior of DACs, on three different levels: architectural design, circuit design, and layout design. The main results achieved are listed below: • Novel topologies using stochastic approaches to linearize multibit converters are presented. • A new method is introduced for avoiding the use of multibit DACs in the main loop of multi-path DS analog-to-digital converters (ADCs), which, combined with a novel noise leakage compensation technique, allows the use of low quality inner DACs. • A novel correction algorithm is proposed, which is based on the acquisition of the individual DAC errors by means of correlation procedures. The extracted values are used for correction purposes. The technique is capable of background operation. • Different circuits are proposed to improve the performance of current-steering DACs. Also, novel layout techniques are shown for reducing the spatial variations of the unit sources. Some of the presented techniques were combined in a prototype chip, designed and fabricated in a 0.35μm CMOS process. Simulation and preliminary measurement results show that they are effective.
dc.language en_US
dc.subject CMOS
dc.subject data converters
dc.subject analog-to-digital
dc.subject digital-to-analog
dc.subject integrated circuits
dc.title Enhanced-accuracy oversampled data converters
dc.type Thesis

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