A 13-bit Noise Shaping SAR-ADC with Dual-Polarity Digital Calibration.

A 13-bit Noise Shaping SAR-ADC with Dual-Polarity Digital Calibration.
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DOI:
10.1007/s10470-013-0050-x
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发表时间:
2013-06-01
影响因子:
1.4
通讯作者:
Ghovanloo, Maysam
Ghovanloo, Maysam
中科院分区:
工程技术4区
文献类型:
--
作者:
Park, Hangue;Ghovanloo, Maysam

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We present a new noise shaping method and a dual polarity calibration technique suited for successive approximation register type analog to digital converters (SAR-ADC). Noise is pushed to higher frequencies with the noise shaping by adding a switched capacitor. The SAR capacitor array mismatch has been compensated by the dual-polarity digital calibration with minimum circuit overhead. A proof-of-concept prototype SAR-ADC using the proposed techniques has been fabricated in a 0.5-μm standard CMOS technology. It achieves 67.7 dB SNDR at 62.5 kHz sampling frequency, while consuming 38.3μW power with 1.8 V supply.
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