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97 results on '"Fan, Shiquan"'

7. Multi-Channel Sensing System Utilizing Mott Memristors for Single-Wire Data Fusion and Back-End Greedy Strategy Data Recovery.

Author

Fan, Shiquan, Liu, Peihao, Shi, Yongqiang, Zhao, Shujing, Han, Chuanyu, Xu, Junyi, and Zhang, Guohe

Subjects
DATA recovery, MEMRISTORS, CIRCUIT complexity, ANALOG circuits, SUCCESSIVE approximation analog-to-digital converters, MULTISENSOR data fusion, SQUARE waves
Abstract

This paper presents a novel Mott memristor-based multi-channel sensing system designed for the simultaneous processing of multiple sensing channels, employing single-wire data fusion and a greedy search strategy for back-end data recovery. Multiple channels of external stimulus information are simultaneously encoded into analog signals with varying frequencies, utilizing a Mott memristor array. Auxiliary circuits then convert the analog sensing signals into square wave signals which are further transformed into narrow (100 ns) pulse signals through pulse generation circuitry. Subsequently, these narrow pulse signals are fused into a single-wire signal by using an OR gate. At the back-end of the system, a greedy searching strategy is applied to accurately identify all frequencies within the fused pulse signal, enabling seamless analog-to-frequency conversion across multiple channels. The system is suitable for a wide range of sensors and can be directly connected to FPGAs for data processing, eliminating the need for traditional analogue front-end and ADC circuits and greatly reducing circuit complexity and power consumption. By leveraging the innovative capabilities of Mott memristors, the proposed system achieves precise analog-to-frequency conversion with significantly reduced power consumption. [ABSTRACT FROM AUTHOR]

Published
2024
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8. A Two-Step Self-Startup Hybrid Structure Step-Up Converter Using Standard 5P0 MOSFETs Achieving 36 × Voltage Boosting With 50 mV Input Voltage and 84 × Input Voltage Range for Self-Powered IoT Applications

Author

Fan, Shiquan, Ma, Weiqing, Lu, Zheng, Han, Chuanyu, Xie, Ying, Zhang, Guohe, and Geng, Li

Abstract

This article presents a hybrid structure step-up converter to achieve self-startup at ultralow input voltage and very wide input voltage range. To realize self-startup, a two-step self-startup strategy is designed, which involves three periods (charge pump self-startup period, hybrid mode period, and boost operating period). To further reduce the self-startup voltage and promote driving capability, a multistage multiphase charge pump with body-bias controlled ring oscillator is proposed. By optimizing design of the ring oscillator, the output ripple of the charge pump is reduced significantly. To solve the inherent contradiction between body-bias technique and operating voltage range, current limitation technique is adopted. The converter is fabricated by using standard 180 nm 5P0 CMOS process with 4.8 mm2 chip area. Measurement results show that the converter can kick-start at 440 mV input voltage, and provide over 96.35 mW at 300 mV input voltage. The input voltage range is up to 84× (50 mV–4.2 V). The output voltage can be maintained at 1.8 V with the minimum input voltage of 50 mV, where 36× voltage step-up ratio is obtained. The maximum inductor current reaches 2 A, and the peak power conversion efficiency of 95.6% is achieved.

Published
2023
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