A 82-nW Chaotic Map True Random Number Generator Based on a Sub-Ranging SAR ADC

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An ultra-low power true random number generator (TRNG) based on a sub-ranging SAR analog-to-digital converter (ADC) is proposed. The proposed TRNG is composed of a coarse-SAR ADC with a low-power adaptive-reset comparator and a low-power dynamic amplifier. The coarse-ADC part is shared with a sub-ranging SAR ADC for area reduction. The shared coarse-ADC not only plays the role of discrete-time chaotic circuit but also reduces the overall SAR ADC energy consumption by selectively activating the fine-SAR ADC. Also, the proposed dynamic residue amplifier consumes only 48 nW and the adaptive-reset comparator generates a chaotic map with only 6-nW consumption. The proposed TRNG core occupies 0.0045 mm(2) in 0.18-mu m CMOS technology and consumes 82 nW at 270-kbps throughput with 0.6-V supply. It successfully passes all of National Institute of Standards and Technology (NIST) tests, and it achieves the state-of-the-art figure-of-merit of 0.3 pJ/bit.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-07
Language
English
Article Type
Article; Proceedings Paper
Keywords

CMOS; ENTROPY; IMPLEMENTATION; SYSTEMS; DESIGN

Citation

IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.52, no.7, pp.1953 - 1965

ISSN
0018-9200
DOI
10.1109/JSSC.2017.2694833
URI
http://hdl.handle.net/10203/225081
Appears in Collection
EE-Journal Papers(저널논문)
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