A 700 μW 1GS/s 4-bit folding-flash ADC in 65nm CMOS for wideband wireless communications
A 700 μW 1GS/s 4-bit folding-flash ADC in 65nm CMOS for wideband wireless communications
复制标题
采用 65nm CMOS 的 700 μW 1GS/s 4 位折叠式闪存 ADC,用于宽带无线通信
DOI:
10.1109/iscas.2017.8050624
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
D. Shahrjerdi
中科院分区:
文献类型:
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作者:
B. Nasri;Sunit P. Sebastian;Kae;RamKumar RanjithKumar;D. Shahrjerdi
We present the design of a low-power 4-bit 1GS/s folding-flash ADC with a folding factor of two in standard 65nm CMOS technology. The design of a new unbalanced double-tail dynamic comparator affords an ultra-low power operation and a high dynamic range. Unlike the conventional approaches, this design uses a fully matched input stage, an unbalanced latch stage, and a two-clock operation scheme. A combination of these features yields significant reduction of the kick-back noise, while allowing the design flexibility for adjusting the trip points of the comparators. As a result, the ADC achieves SNDR of 22.3 dB at 100MHz and 21.8 dB at 500MHz (i.e. the Nyquist frequency). The maximum INL and DNL are about 0.2 LSB. The converter consumes about 700μW from a 1-V supply yielding a figure of merit of 65fJ/conversion step. These attributes make the proposed folding-flash ADC attractive for the next-generation wireless applications.