TY - GEN

T1 - Increasing the ADC precision with oversampling in a flash ADC

AU - Abumurad, Abdulrahman

AU - Choi, Kyusun

PY - 2012/12/1

Y1 - 2012/12/1

N2 - This paper proposes new design to implement high resolution ADC using the idea of oversampling in flash ADCs. We used 6-bit Flash ADC with 65 times oversampling to gain a resolution of 12-bit Flash ADC. Conventional Flash ADCs are implemented using 2n comparators while proposed design requires only (26 + L(n)) comparators, Where L(n) is an exponential operator in n with order less than 2n/3. This reduction in chip area would reduce power consumption, since sampling rates for both (conventional Flash ADC and proposed) designs are the same. Signal-to-Noise ratio (SNR) and Distortion (SINAD) of the proposed 12-bit Oversampled-Flash ADC output was only at most 1.7% decrease compared to ideal 12-Bit Sigma-Delta (Δ) ADC. Moreover if an ideal 6-bit flash ADC is used to implement a 12-bit Oversampled-Flash ADC, DNL and INL values for proposed 12-bit oversampled-Flash ADC would be zero.

AB - This paper proposes new design to implement high resolution ADC using the idea of oversampling in flash ADCs. We used 6-bit Flash ADC with 65 times oversampling to gain a resolution of 12-bit Flash ADC. Conventional Flash ADCs are implemented using 2n comparators while proposed design requires only (26 + L(n)) comparators, Where L(n) is an exponential operator in n with order less than 2n/3. This reduction in chip area would reduce power consumption, since sampling rates for both (conventional Flash ADC and proposed) designs are the same. Signal-to-Noise ratio (SNR) and Distortion (SINAD) of the proposed 12-bit Oversampled-Flash ADC output was only at most 1.7% decrease compared to ideal 12-Bit Sigma-Delta (Δ) ADC. Moreover if an ideal 6-bit flash ADC is used to implement a 12-bit Oversampled-Flash ADC, DNL and INL values for proposed 12-bit oversampled-Flash ADC would be zero.

UR - http://www.scopus.com/inward/record.url?scp=84874844799&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874844799&partnerID=8YFLogxK

U2 - 10.1109/ICSICT.2012.6467786

DO - 10.1109/ICSICT.2012.6467786

M3 - Conference contribution

AN - SCOPUS:84874844799

SN - 9781467324724

T3 - ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings

BT - ICSICT 2012 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, Proceedings

T2 - 2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2012

Y2 - 29 October 2012 through 1 November 2012

ER -