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- W1980767874 abstract "This paper presents a SAR ADC with 71 dB SNDR and 85 dB SFDR at 50 MS/s while keeping low power consumption of 4.2 mW. To achieve high resolution without large increase of power, several SNR and SFDR enhancement techniques are proposed. Firstly, the ADC repeats comparison of LSB by using redundant DAC to average comparator noise and improve SNR. The technique also corrects settling error adaptively, which extends operation speed to 50 MHz even though extra comparison period is added for averaging. Secondly, simple filtering method for reducing DAC noise is introduced to achieve further improvement of SNR. Finally, new dithering method is proposed to enhance SFDR. Injecting noise-shaped, multi-valued and uniform-distributed dither to input of the ADC, spurs caused by capacitance mismatches of DAC can be suppressed more effectively compared with conventional dithering. These techniques can be realized by simple circuits in addition to a basic SAR ADC configuration and do not need high power consumption. The chip is fabricated in a 90 nm CMOS process and occupies 0.1 mm 2 including all correction logic. The ADC achieved a peak figure of merit (FoM) of 168.7 dB." @default.
- W1980767874 created "2016-06-24" @default.
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- W1980767874 date "2015-06-01" @default.
- W1980767874 modified "2023-10-18" @default.
- W1980767874 title "A 4.2 mW 50 MS/s 13 bit CMOS SAR ADC With SNR and SFDR Enhancement Techniques" @default.
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- W1980767874 doi "https://doi.org/10.1109/jssc.2015.2417803" @default.
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