Concept and Design of a High Speed Current Mode Based SAR ADC - Brossura

Elkafrawy, Abdelrahman; Ortmanns, Maurits

 
9786139928019: Concept and Design of a High Speed Current Mode Based SAR ADC
Brossura
ISBN 10: 613992801X ISBN 13: 9786139928019
Casa editrice: LAP LAMBERT Academic Publishing, 2018

Sinossi

There is continuous research to exploit the improved speed of scaled CMOS technologies in realizing high-speed analog-to-digital converters and SAR ADCs are one of the candidates which can significantly benefit from this technology scaling. Remarkable improvements have been recently reported on single-channel time-interleaved charge-based SAR ADCs to achieve sampling rates in the range of GS/s with excellent power effeciency but the challenge of driving a large sampling capacitor with high accuracy in a short sampling window is often not addressed. In this work, a high-speed current-mode DAC is replacing the commonly used charge-mode SC-DAC which alleviates the problem of driving a large input sampling capacitor in a short time. The proposed current-mode SAR ADC also uses a Gm stage which converts the input voltage to a current which is then processed in a current-based binary search algorithm SAR loop. In comparison to the conventional SC-SAR ADC structures, the sampling capacitor size is smaller than the total capacitance of the comparable SC-SAR ADCs. Moreover, low-impedance DAC-reference voltages which are essential for SC-DAC are removed by using this approach.

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Editore
LAP LAMBERT Academic Publishing
Data di pubblicazione
2018
Lingua
Inglese
ISBN 10 
613992801X
ISBN 13 
9786139928019
Rilegatura
Copertina flessibile
Numero di pagine
132
Contatto del produttore
non disponibile
Persona responsabile
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