{"title":"Incorporation of Chopping in Continuous Time K-Delta-1-Sigma Modulator","authors":"Sachin P. Namboodiri, R. J. Baker","doi":"10.1109/NEWCAS50681.2021.9462794","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462794","url":null,"abstract":"A chopping technique in a continuous time K-delta-1-sigma modulator (KD1S) is reported in this paper. It is shown that the presence of the inherent path filter in the proposed technique can significantly improve the performance of the modulator by minimizing the aliased quantization noise. Also reported are how the selection of chopping frequency and its relation to sampling frequency and the trade-offs. To support the theory, a first order K-delta-1-sigma topology was designed in a 180nm CMOS process. Simulations are used to illustrate the validity of the results. The modulator works at a sampling frequency of 1 MHz with an oversampling ratio of 256. It consumes an average current of 61.18 µA from 1.8 V supply. The simulation result shows that there is more than 25dB improvement in the Signal-to-Noise Ratio (SNR) of the KD1S, when chopped at the right frequency.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131920385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"RISC-V Resource-Constrained Cores: A Survey and Energy Comparison","authors":"Islam Elsadek, E. Tawfik","doi":"10.1109/NEWCAS50681.2021.9462781","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462781","url":null,"abstract":"Resource-Constrained electronic devices targeting IoT applications need a microcontroller to control their operation, and hence this microcontroller should be energy efficient to increase battery life. One of the emerging open-source processors ISA is RISC-V; as an open-source, it provides a great opportunity for innovation and creativity in designing processor cores. This study targets to survey open-source RISC-V cores and classify them as high-performance and resource-constrained. Afterward, we shortlist the most optimized cores for resource-constrained devices. Seven shortlisted cores are implemented using an ASIC prototyping platform as a unified technology and are compared using resource utilization and energy consumption profile to find the most energy efficient core. We proposed a method to evaluate the energy consumption using power and performance values. Results showed Ibex core to have the best energy consumption characteristics with 8.7 Coremark iterations/mJ over the ASIC prototyping platform.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133218353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Isa H. Altoobaji, Mohamed Ali, Ahmad Hassan, Y. Audet, A. Lakhssassi
{"title":"A High Speed Fully Integrated Capacitive Digital Isolation System in 0.35 µm CMOS for Industrial Sensor Interfaces","authors":"Isa H. Altoobaji, Mohamed Ali, Ahmad Hassan, Y. Audet, A. Lakhssassi","doi":"10.1109/NEWCAS50681.2021.9462788","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462788","url":null,"abstract":"This work presents the implementation and simulation of a high speed fully integrated capacitive digital isolation system in 0.35 µm CMOS process. Pulse amplitude modulation scheme was adopted for the proposed design to allow high data rates while maintaining a small integration area compared to the current state-of-art works. The proposed modulation scheme eliminates the need of additional larger on-chip capacitor to support low-frequency operation. Simulation results show that the proposed system supports a wide range of data rates between 50 kbps and 500 Mbps. Moreover, the design shows a propagation delay of only 2 ns from input to output, which allows fast operation.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114643299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David Ouattara, C. Durand, P. Ferrari, S. Bourdel, F. Paillardet
{"title":"An hybrid approach for high-performance passive 120-GHz phase shifters in BiCMOS technology","authors":"David Ouattara, C. Durand, P. Ferrari, S. Bourdel, F. Paillardet","doi":"10.1109/NEWCAS50681.2021.9462755","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462755","url":null,"abstract":"In this paper, an original architecture of a mm-wave passive phase shifter is presented. It is based on an original hybrid approach mixing digital and analog stages to form a 0-360° continuous phase shifting. The overall architecture is presented and a detailed analysis of the insertion loss of each stage is performed, leading to a figure of merit of 34°/dB. Then the design of the 45° digital stage is carried out up to the layout, with a careful description of the optimization steps.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129758465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Wideband High-Order All-Pass Delay Circuits","authors":"Z. Kabirkhoo, M. Radpour, L. Belostotski","doi":"10.1109/NEWCAS50681.2021.9462790","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462790","url":null,"abstract":"In this work, we present a novel wideband high-order all-pass delay-circuit topology suitable for radio-frequency (RF) applications. The proposed all-pass delay circuit avoids conventional cascading, which degrades bandwidth and increases power consumption. The proposed delay-circuit topology consists of a common-source transistor and a passive impedance network. The delay-circuit order is increased via the passive impedance-network extension. The operation of the all-pass delay circuit is validated through the designs of 4th- and 5th-order all-pass filters in a 22-nm CMOS process. Post-layout simulations of the 4th- and 5th-order delay circuits demonstrate group delays of 60 ps, 90 ps across 17.9 GHz, 18.3 GHz bandwidths while only consuming 1.34 mW, 1.48 mW from a 1 V power supply, respectively.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127667441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Manon Fourniol, V. Gies, V. Barchasz, E. Kussener, R. Vauché, H. Barthélemy, H. Glotin
{"title":"Ultra Low-Power 2.5µW CMOS Implementation of a Mixed Analog-Digital Wake-Up System Based on Frequency Analysis","authors":"Manon Fourniol, V. Gies, V. Barchasz, E. Kussener, R. Vauché, H. Barthélemy, H. Glotin","doi":"10.1109/NEWCAS50681.2021.9462746","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462746","url":null,"abstract":"An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented in this paper. Focused on environmental or military Internet of Things (IoT) applications, it aims at detecting in real time the presence of specific animal species or drones for generating alerts and for triggering power consuming tasks such as high frequency signal recording only when needed.This wake-up detector continuously monitors the presence of specific frequencies in an analog acoustic signal, with a good frequency selectivity and a high frequency range detection capability. It is based on an ultra-low power analog frequency to voltage converter using a current-mirror, analog timers and synchronous comparators.Dedicated to long term stealth environmental or military surveys, a strong emphasis has been put on power consumption reduction in order to reduce batteries constraints. Its power consumption has been reduced to 2.5µW, leading to an autonomy of more than 28 years with a single coin cell CR2032 battery.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114507952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Guillaume Devic, M. France-Pillois, Jérémie Salles, G. Sassatelli, A. Gamatie
{"title":"Highly-Adaptive Mixed-Precision MAC Unit for Smart and Low-Power Edge Computing","authors":"Guillaume Devic, M. France-Pillois, Jérémie Salles, G. Sassatelli, A. Gamatie","doi":"10.1109/NEWCAS50681.2021.9462745","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462745","url":null,"abstract":"Machine learning algorithms are compute- and memory-intensive. Their execution at the edge on resource-constrained embedded systems is challenging. Data quantization, i.e. data bit-width reduction, contributes to reducing de-facto the memory bandwidth requirement. In order to best exploit this bit-width reduction, a prevailing approach consists of tailored hardware accelerators. Another approach relies on general-purpose compute units with Single Instruction Multiple Data (SIMD) support for reduced data bit-width precision, as in ARM Cortex-M [1] or RISC-V based RI5CY [2] processors. However, such processors only handle a few predefined bit-width ranges, e.g. 8-bit and 16-bit only for the ARM SIMD.This paper proposes a flexible architecture of Multiply-and-Accumulate (MAC) unit allowing asymmetric multiplication for operand sizes in powers of 2, up to 32 bits. The synthesis of this architecture in 28nm FD-SOI technology shows 10% and 25% reduction in area and dynamic power respectively, compared to the RI5CY MAC unit. From the energy-efficiency point of view, up to 50% improvements are achieved.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121419032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vu Truong-Tuan, Chi Hoang-Phuong, Anh Pham-Tuan, Phuc Pham-Hong, Quang Hieu Dang, Hoang Nguyen-Huy, Minh Nguyen-Duc
{"title":"FPGA Implementation of Parallel Neurosynaptic Cores for Neuromorphic Architectures","authors":"Vu Truong-Tuan, Chi Hoang-Phuong, Anh Pham-Tuan, Phuc Pham-Hong, Quang Hieu Dang, Hoang Nguyen-Huy, Minh Nguyen-Duc","doi":"10.1109/NEWCAS50681.2021.9462774","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462774","url":null,"abstract":"Fully digital neuromorphic hardware architectures such as IBM’s TrueNorth [1] and Intel’s Loihi [2] have been developed to mimic biologically inspired spiking neural networks (SNNs). Besides being fabricated by CMOS technology, the neuromorphic architecture can be emulated in FPGA SoCs such as those proposed in the RANC framework [6]. In this paper, we present novel parallel neurosynaptic cores containing neurons working simultaneously. The proposed cores can be used in the TrueNorth-inspired neuromorphic architecture to improve performance as well as power consumption. To validate the functional behaviour of the proposed architecture, we construct a SNN containing five parallel neurosynaptic cores to handle the MNIST handwritten digit dataset. Each core consists of 256 neurons working simultaneously. The proposed SNN is implemented on Xilinx Kintex 7 SoC and is as accurate as the sequential SNN implemented in the RANC framework. The synthesised SNN utilises twice the number of LUTs and the same number of flip-flops, IOs and LUTRAM compared to the RANC based SNN. It is 86 times faster in term of images per second being processed. In addition, with the same performance of images per second, our SNN consumes only 36mW of dynamic power which is 22 times lower than the RANC based SNN.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129332541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mixed signal compensation of sampling errors in ADCs due to noisy DPLL clock sources","authors":"Hao Zheng, Eric Thompson, J. Hogan, Daniel O’Hare","doi":"10.1109/NEWCAS50681.2021.9462737","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462737","url":null,"abstract":"This paper proposes a method to compensate for sampling errors in ADCs when a noisy digital phase locked-loop (DPLL) is used as the clock source. MATLAB Simulink models are used to create a time domain DPLL model with accurate Phase Noise. Time-to-digital converter (TDC) of the locked DPLL provides an estimate of jitter which is used with an analog differentiator to provide an estimate of the ADC sampling error. An improved compensation allows the ADC effective number of bits at high frequency to be improved from 2 bits to 6 bits.","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114518217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Viera, J. Dutertre, Mathieu Dumont, Pierre-Alain Moëllic
{"title":"Permanent Laser Fault Injection into the Flash Memory of a Microcontroller","authors":"R. Viera, J. Dutertre, Mathieu Dumont, Pierre-Alain Moëllic","doi":"10.1109/NEWCAS50681.2021.9462773","DOIUrl":"https://doi.org/10.1109/NEWCAS50681.2021.9462773","url":null,"abstract":"The Flash memory of a Microcontroller Unit (MCU) is an important part of its attack surface as it contains its firmware and its security related data (e.g. passwords and cryptographic keys). Recent research works report the use of Laser Fault Injections (LFI) to corrupt the firmware at run time by targeting the Flash memory during its read operations (data reads from Flash were also faulted). These faults, induced on a single bit and following a bit-set fault model, were non-permanent: the data stored in Flash stayed unaltered while only their read copies were corrupted. We report an extension of this fault model on the Flash memory of a 32-bit MCU. Using LFI, we were able to induce permanent faults into its Flash. Single bit faults, that followed a bit-reset fault model, were induced during the Flash write operations. As a proof of concept, we describe how we were able to iteratively set to zero all the bits of a 32-bit password using a laser pulse with relatively undemanding settings (15 µm beam diameter, and 3 µs pulse duration).","PeriodicalId":373745,"journal":{"name":"2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126208496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}