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Wu Liu - IEEE Xplore Author Profile

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Author details

Wu Liu

Publications

48

Citations

2,163

Publications by Year

20122025

Co-Authors:

Qian BaoBin WangMichael J. BlackJuan CaoCherry Che

Show All Co-Authors (111)

Wu Liu

Affiliation

College of Information Science and Technology

University of Science and Technology of China

Hefei, Anhui, China

Publication Topics

3D Body,
Feature Maps,
Metric Learning,
Re-identification Task,
Visible Images,
3D Mesh,
3D Pose,
3D Position,
3D Shape,
Camera Pose,
Convolutional Layers,
Convolutional Neural Network

Biography

Wu Liu (Senior Member, IEEE) received the Ph.D. degree from the Multimedia Computing Group (MCG), Institute of Computing Technology (ICT), Chinese Academy of Science (CAS), China. He is currently a Special Professor with the School of Information Science and Technology, University of Science and Technology of China. His current research interests include human behavior analysis, vehicle search/re-identification, large multimedia model, video generation, multi-agent systems, and multimedia analysis and search.(Based on document published on 2 September 2024).

Publications

48

Citations

2,163

Publications by Year

20122025

Co-Authors:

Qian Bao
Bin Wang
Michael J. Black
Juan Cao
Cherry Che

Show All Co-Authors (111)

Author's Published Works

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Showing 1-25 of 38 results

Conferences (26)

Journals (12)

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Xiong Zhou(38)
Qiang Li(38)
Sanfeng Zhang(10)
Shiheng Yang(8)
Zhaoming Ding(7)
Institute of Integrated Circuits and Systems, University of Electronic Science and Technology of China, Chengdu, China(12)
Institute of Integrated Circuits and Systems (IICS), University of Electronic Science and Technology of China, Chengdu, China(5)
University of Electronic Science and Technology of China, Chengdu, China(4)
Institute of Microelectronics, University of Ulm, Ulm, Germany(2)
Institute of Integrated Circuit and System, University of Electronic Science and Technology of China(2)
IEEE Journal of Solid-State Circuits(7)
2019 IEEE International Symposium on Circuits and Systems (ISCAS)(2)
2020 IEEE International Solid-State Circuits Conference - (ISSCC)(2)
2022 IEEE International Symposium on Circuits and Systems (ISCAS)(2)
IEEE Transactions on Circuits and Systems II: Express Briefs(2)
IEEE(38)
Media(2)
Austin, TX, USA(2)
Chengdu, China(2)
San Francisco, CA, USA(2)
Sapporo, Japan(2)
Shanghai, China(2)
Supply Voltage(15)
Analog-to-digital Converter(14)
Power Consumption(13)
Figure Of Merit(11)
Noise Performance(10)

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Results

A Digital Readout Integrated Circuit Based on Pixel-Level ADC Incorporating On-Chip Image Algorithm Calibration for IRFPA

Yan Zeng;Shiheng Yang;Yueduo Liu;Rongxin Bao;Zihao Zhu;Jiahui Lin;Xiong Zhou;Yong Chen;Jun Yin;Pui-In Mak;Qiang Li

IEEE Sensors Journal

Year: 2023 | Volume: 23, Issue: 18 | Journal Article |

Cited by: Papers (4)

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This article presents a digital readout integrated circuit (DROIC) with fully ON-chip image algorithm calibration based on the pixel-level 18-bit analog-to-digital converter (ADC) for infrared focal plane array (IRFPA) applications. Such ON-chip calibrations include bad pixel compensation, nonuniformity correction, and background subtraction, which are implemented to avoid ON-chip memory storage f...Show More

A Digital Readout Integrated Circuit Based on Pixel-Level ADC Incorporating On-Chip Image Algorithm Calibration for IRFPA

Yan Zeng;Shiheng Yang;Yueduo Liu;Rongxin Bao;Zihao Zhu;Jiahui Lin;Xiong Zhou;Yong Chen;Jun Yin;Pui-In Mak;Qiang Li

IEEE Sensors Journal

Year: 2023 | Volume: 23, Issue: 18 | Journal Article |

On the DC-Settling Process of the Pierce Crystal Oscillator in Start-Up

Zehao Zhang;Shiheng Yang;Yueduo Liu;Zihao Zhu;Jiahui Lin;Rongxin Bao;Tailong Xu;Zhizhan Yang;Mingkang Zhang;Jiaxin Liu;Xiong Zhou;Jun Yin;Pui-In Mak;Qiang Li

IEEE Transactions on Circuits and Systems II: Express Briefs

Year: 2023 | Volume: 70, Issue: 1 | Journal Article |

Cited by: Papers (2)

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This brief presents an analytical treatment of the initial motional current

${i}_{m}{(}{0}{)}$ of the Pierce crystal oscillator (XO), which is critical for determining its start-up time

${T}_{s}$ . Specifically, the limitation of energy injection to boost

${i}_{m}{(}{0}{)}$ is studied, and the dc-settling process (DCS) at the dawn of the start-up for stimulating

${i}_{m}{(}{0}{)}$ is shown....Show More

On the DC-Settling Process of the Pierce Crystal Oscillator in Start-Up

Zehao Zhang;Shiheng Yang;Yueduo Liu;Zihao Zhu;Jiahui Lin;Rongxin Bao;Tailong Xu;Zhizhan Yang;Mingkang Zhang;Jiaxin Liu;Xiong Zhou;Jun Yin;Pui-In Mak;Qiang Li

IEEE Transactions on Circuits and Systems II: Express Briefs

Year: 2023 | Volume: 70, Issue: 1 | Journal Article |

A 4.2-to-5.6 GHz Transformer-Based PMOS-only Stacked-gm VCO in 28-nm CMOS

Mingkang Zhang;Zihao Zhu;Yueduo Liu;Zehao Zhang;Rongxin Bao;Jiahui Lin;Haovu Zhuang;Jiaxin Liu;Xiong Zhou;Shiheng Yang;Qiang Li

2022 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

Year: 2022 | Conference Paper |

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This paper presents a low power, low phase noise, and small chip area transformer-based PMOS-only stacked-g», LC VCO in a 28-nm process. Both the top and bottom use PMOS cross-coupled pairs to provide negative resistances with suppressing the flicker noise. An interleaved transformer is used to get a higher coupling coefficient to achieve small chip area and high passive voltage gain. The VCO exhi...Show More

A 4.2-to-5.6 GHz Transformer-Based PMOS-only Stacked-gm VCO in 28-nm CMOS

Mingkang Zhang;Zihao Zhu;Yueduo Liu;Zehao Zhang;Rongxin Bao;Jiahui Lin;Haovu Zhuang;Jiaxin Liu;Xiong Zhou;Shiheng Yang;Qiang Li

2022 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

Year: 2022 | Conference Paper |

A 13-bit 1-MS/s SAR ADC With Rotation-Based Mismatch Error Cancellation

Jing Zhang;Lulu Zhang;Xiong Zhou;Maurits Ortmanns;Qiang Li

2022 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2022 | Conference Paper |

Cited by: Papers (2)

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This paper presents a mismatch error cancellation technique for high-resolution successive approximation register (SAR) analog-to-digital converter (ADC). The proposed technique that combines residue voltage oversampling and capacitors rotation significantly diminishes the impact of capacitor mismatch without calibration. A VCO-based comparator is adopted to achieve good noise performance with hig...Show More

A 13-bit 1-MS/s SAR ADC With Rotation-Based Mismatch Error Cancellation

Jing Zhang;Lulu Zhang;Xiong Zhou;Maurits Ortmanns;Qiang Li

2022 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2022 | Conference Paper |

A 100dB-TCMRR 8-Channel Bio-Potential Front-End with Multi-Channel Common-Mode Replication

Borui Tan;Sanfeng Zhang;Chen Gao;Xiong Zhou;Qiang Li

2022 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2022 | Conference Paper |

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For a multichannel bio-potential signal acquisition front-end, it's total CMRR (TCMRR) is restricted by these three factors: the inherent CMRR (ICMRR) of the amplifier used in the acquisition front-end, the impedance mismatch of electrodes, and the systematic mismatch due to the shared reference electrode. This paper presents a 8-channel bio-potential front-end with multi-channel common-mode repli...Show More

A 100dB-TCMRR 8-Channel Bio-Potential Front-End with Multi-Channel Common-Mode Replication

Borui Tan;Sanfeng Zhang;Chen Gao;Xiong Zhou;Qiang Li

2022 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2022 | Conference Paper |

Accurate Performance Evaluation of Jitter-Power FOM for Multiplying Delay-Locked Loop

Yueduo Liu;Rongxin Bao;Zihao Zhu;Shiheng Yang;Xiong Zhou;Jun Yin;Pui-In Mak;Qiang Li

IEEE Transactions on Circuits and Systems I: Regular Papers

Year: 2022 | Volume: 69, Issue: 2 | Journal Article |

Cited by: Papers (2)

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An accurate performance evaluation of jitter-power figure-of-merit (FOM) for multiplying delay-locked loop (MDLL) is presented. For a typical MDLL employing a single-ended multiplying-delay ring voltage-controlled oscillator (MDVCO), it can be tuned via the capacitive loads to uphold a constant normalized phase noise (PN) across different frequencies for better jitter-power performance. Linear app...Show More

Accurate Performance Evaluation of Jitter-Power FOM for Multiplying Delay-Locked Loop

Yueduo Liu;Rongxin Bao;Zihao Zhu;Shiheng Yang;Xiong Zhou;Jun Yin;Pui-In Mak;Qiang Li

IEEE Transactions on Circuits and Systems I: Regular Papers

Year: 2022 | Volume: 69, Issue: 2 | Journal Article |

An On-Chip Power-Supply Noise Analyzer With Compressed Sensing and Enhanced Quantization

Pengfei Zhai;Zheng Zhu;Xiong Zhou;Yan Cai;Fan Zhang;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2022 | Volume: 57, Issue: 1 | Journal Article |

Cited by: Papers (5)

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This article discusses the on-chip measurement of the power-supply noise (PSN) and demonstrates a scalable PSN spectrum analyzer with significantly improved speed and accuracy. Compressed sensing is exploited in the autocovariance-based measurement since the cyclostationary PSN is sparse. A six-level voltage-controlled oscillator (VCO)-based phase quantizer is proposed to improve the noise perform...Show More

An On-Chip Power-Supply Noise Analyzer With Compressed Sensing and Enhanced Quantization

Pengfei Zhai;Zheng Zhu;Xiong Zhou;Yan Cai;Fan Zhang;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2022 | Volume: 57, Issue: 1 | Journal Article |

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

Sanfeng Zhang;Xiong Zhou;Chen Gao;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2022 | Volume: 57, Issue: 1 | Journal Article |

Cited by: Papers (17)

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High common-mode rejection ratio (CMRR) of an analog front end (AFE) requires high intrinsic CMRR of the front-end amplifier with high input common-mode (CM) impedance. This article presents a common-mode replication (CM-REP) technique, which replicates the input CM voltage over the front-end amplifier. By eliminating the CM current flow and its mismatch effect, CM-REP improves CMRR and input CM i...Show More

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

Sanfeng Zhang;Xiong Zhou;Chen Gao;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2022 | Volume: 57, Issue: 1 | Journal Article |

A Low Power Sample-and-Hold Circuit with Improved Dynamic Bias for Pipelined ADC

Xiaodan Zhou;Zehao Li;Yujie Wang;Xiong Zhou;Shiheng Yang;Jiaxin Liu;Qiang Li

2021 IEEE Asia Pacific Conference on Circuit and Systems (APCCAS)

Year: 2021 | Conference Paper |

Cited by: Papers (1)

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A low power and high-speed sample-and-hold (S/H) circuit which is suitable for the 16bit pipelined analog-to-digital converter (ADC) is proposed. By using the dynamic bias technique, The OTA in the S/H is realized with lower power dissipation. This S/H is fabricated in $0.18\ \mu\ \mathrm{m}$ mixed signal CMOS process and occupies 0.128mm2. It is integrated in a 16bit 25MS/s pipelined ADC which de...Show More

A Low Power Sample-and-Hold Circuit with Improved Dynamic Bias for Pipelined ADC

Xiaodan Zhou;Zehao Li;Yujie Wang;Xiong Zhou;Shiheng Yang;Jiaxin Liu;Qiang Li

2021 IEEE Asia Pacific Conference on Circuit and Systems (APCCAS)

Year: 2021 | Conference Paper |

A Comparator Speed Enhancement Technique for Near- and Sub-Threshold ADCs

Bojun Hu;Sanfeng Zhang;Xiong Zhou;Zehao Li;Xiangxin Pan;Zhaoming Ding;Qiang Li

2021 28th IEEE International Conference on Electronics, Circuits, and Systems (ICECS)

Year: 2021 | Conference Paper |

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This paper presents a comparator speed enhancement technique for successive approximation register (SAR) analog-to-digital converter (ADC) under near- and sub-threshold supply voltages. The proposed delayed cross-coupling comparator effectively improves the speed of the comparator while maintaining a good noise performance. This work has been proved by a 350mV 8bit 12MS/s SAR ADC designed in a 65n...Show More

A Comparator Speed Enhancement Technique for Near- and Sub-Threshold ADCs

Bojun Hu;Sanfeng Zhang;Xiong Zhou;Zehao Li;Xiangxin Pan;Zhaoming Ding;Qiang Li

2021 28th IEEE International Conference on Electronics, Circuits, and Systems (ICECS)

Year: 2021 | Conference Paper |

A Low-Power RC Oscillator with Offset and Path Delay Cancellation

Yueduo Liu;Zihao Zhu;Rongxin Bao;Shiheng Yang;Jiaxin Liu;Xiong Zhou;Qiang Li

2021 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

Year: 2021 | Conference Paper |

Cited by: Papers (4)

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A 128-kHz RC time-constant-based relaxation oscillator is designed in 180-nm CMOS for ultra-low-power applications. The chopping structure and replica path delay loop are employed in this work to eliminate the effect of comparator offset and path delay respectively, leading to a frequency accuracy of ±0.21% over the temperature range from -20°C to 100 °C. The power consumption is 344 nW with 0.8-V...Show More

A Low-Power RC Oscillator with Offset and Path Delay Cancellation

Yueduo Liu;Zihao Zhu;Rongxin Bao;Shiheng Yang;Jiaxin Liu;Xiong Zhou;Qiang Li

2021 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

Year: 2021 | Conference Paper |

A 640×512 30μm Pixel Pitch 1.8mK-NETD 90.1dB-SNR Digital Read-out Integrated Circuit with Fully On-chip Image Algorithm Pixel-Level Calibration

Yan Zeng;Shiheng Yang;Yueduo Liu;Zehao Li;Wengang Huang;Xiaozong Huang;Xiong Zhou;Jiaxin Liu;Qiang Li

2021 IEEE Asian Solid-State Circuits Conference (A-SSCC)

Year: 2021 | Conference Paper |

Cited by: Papers (1)

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Infrared focal plane arrays (IRFPAs) have been widely used in industrial, scientifical and medical imaging applications [1]–[5]. Due to the limitation of the manufacturing process, material quality and other factors, IRFPAs inevitably suffer from the current non-uniformity under the same light intensity; and the bad pixel with extreme photoelectric response which significantly degrade the quality ...Show More

A 640×512 30μm Pixel Pitch 1.8mK-NETD 90.1dB-SNR Digital Read-out Integrated Circuit with Fully On-chip Image Algorithm Pixel-Level Calibration

Yan Zeng;Shiheng Yang;Yueduo Liu;Zehao Li;Wengang Huang;Xiaozong Huang;Xiong Zhou;Jiaxin Liu;Qiang Li

2021 IEEE Asian Solid-State Circuits Conference (A-SSCC)

Year: 2021 | Conference Paper |

A 9.08 ENOB 10b 400MS/s Subranging SAR ADC with Subsetted CDAC and PDAS in 40nm CMOS

Qiang Yu;Xiong Zhou;Kefeng Hu;Zijian Huang;Haiwen Chen;Xin Si;Jinda Yang;Qiang Li

ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference (ESSCIRC)

Year: 2021 | Conference Paper |

Cited by: Papers (4)

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In this work, a 10b 400MS/s single-channel SAR ADC is reported. Without an auxiliary sub-ADC, a subranging architecture is proposed, where only one comparator is used with the subsetted capacitive DAC (CDAC), eliminating the mismatch of comparators and saving area. For the subranging process, a partial detect-and-skip (PDAS) switching scheme is proposed, which improves both power efficiency and li...Show More

A 9.08 ENOB 10b 400MS/s Subranging SAR ADC with Subsetted CDAC and PDAS in 40nm CMOS

Qiang Yu;Xiong Zhou;Kefeng Hu;Zijian Huang;Haiwen Chen;Xin Si;Jinda Yang;Qiang Li

ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference (ESSCIRC)

Year: 2021 | Conference Paper |

A Sampling Speed Enhancement Technique for Near-Threshold SAR ADCs

Bojun Hu;Sanfeng Zhang;Xiong Zhou;Xiangxin Pan;Zhaoming Ding;Qiang Li

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2021 | Conference Paper |

Cited by: Papers (1)

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This paper presents a sampling speed-enhancement technique for SAR ADCs under near-threshold supply voltages. The proposed level-shifted boosting circuit generates sharp falling edges for the sampling clock, which is found a key factor limiting the sample speed under ultra-low voltages. A 0.35V 8b 12MS/s SAR ADC is designed in a 65nm CMOS technology to prove this technique. The post-layout simulat...Show More

A Sampling Speed Enhancement Technique for Near-Threshold SAR ADCs

Bojun Hu;Sanfeng Zhang;Xiong Zhou;Xiangxin Pan;Zhaoming Ding;Qiang Li

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2021 | Conference Paper |

Sampling and Comparator Speed-Enhancement Techniques for Near-Threshold SAR ADCs

Bojun Hu;Sanfeng Zhang;Xiangxin Pan;Xiangyu Zhao;Zhaoming Ding;Xiong Zhou;Shiheng Yang;Qiang Li

IEEE Open Journal of Circuits and Systems

Year: 2021 | Volume: 2 | Journal Article |

Cited by: Papers (3)

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This paper presents the sampling and comparator speed-enhancement techniques for SAR ADCs under near-threshold supply voltages. The proposed level-shifted boosting circuit generates sharp falling edges for the sampling clock, which is found a key factor limiting the sample speed under ultra-low voltages. Delayed cross-coupling comparator is introduced in this work, which enhances the comparator re...Show More

Sampling and Comparator Speed-Enhancement Techniques for Near-Threshold SAR ADCs

Bojun Hu;Sanfeng Zhang;Xiangxin Pan;Xiangyu Zhao;Zhaoming Ding;Xiong Zhou;Shiheng Yang;Qiang Li

IEEE Open Journal of Circuits and Systems

Year: 2021 | Volume: 2 | Journal Article |

An AC-Coupled Instrumentation Amplifier Achieving 110-dB CMRR at 50 Hz With Chopped Pseudoresistors and Successive-Approximation-Based Capacitor Trimming

Sanfeng Zhang;Xiong Zhou;Chen Gao;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2021 | Volume: 56, Issue: 1 | Journal Article |

Cited by: Papers (14)

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High common-mode rejection ratio (CMRR) with concurrent electrode offset rejection is essential for physiological signal acquisitions. This article presents a CMRR enhancement technique for ac-coupled instrumentation amplifiers (ACIAs), where the mismatch of passive components limits the CMRR performance primarily. A modified chopping structure is proposed to mitigate the mismatch effect of the ps...Show More

An AC-Coupled Instrumentation Amplifier Achieving 110-dB CMRR at 50 Hz With Chopped Pseudoresistors and Successive-Approximation-Based Capacitor Trimming

Sanfeng Zhang;Xiong Zhou;Chen Gao;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2021 | Volume: 56, Issue: 1 | Journal Article |

25.4 A Scalable 20GHz On-Die Power-Supply Noise Analyzer with Compressed Sensing

Pengfei Zhai;Xiong Zhou;Yan Cai;Zheng Zhu;Fan Zhang;Qiang Li

2020 IEEE International Solid-State Circuits Conference - (ISSCC)

Year: 2020 | Conference Paper |

Cited by: Papers (1)

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This work presents a fully integrated PSN analyzer with significantly improved measurement speed and noise performance. Compressed sensing is exploited due to the sparse nature of PSN signals. A VCO-based muiti-level phase quantizer is proposed, offering improved noise performance. A polyphase clock generator is also implemented on chip, enabling the whole system to work with only one external clo...Show More

25.4 A Scalable 20GHz On-Die Power-Supply Noise Analyzer with Compressed Sensing

Pengfei Zhai;Xiong Zhou;Yan Cai;Zheng Zhu;Fan Zhang;Qiang Li

2020 IEEE International Solid-State Circuits Conference - (ISSCC)

Year: 2020 | Conference Paper |

23.7 A 130dB CMRR Instrumentation Amplifier with Common-Mode Replication

Sanfeng Zhang;Chen Gao;Xiong Zhou;Qiang Li

2020 IEEE International Solid-State Circuits Conference - (ISSCC)

Year: 2020 | Conference Paper |

Cited by: Papers (11)

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Interfacing with high-impedance sensors, such as dry-contacted electrodes and accelerometers requires high CMRR with sufficient input impedance concurrently. From the system point of view, the total CMRR (TCMRR) is determined by the intrinsic CMRR (ICMRR) of the front-end amplifier as well as the imbalance of source impedance; the latter has to be accommodated by large input common-mode (CM) imped...Show More

23.7 A 130dB CMRR Instrumentation Amplifier with Common-Mode Replication

Sanfeng Zhang;Chen Gao;Xiong Zhou;Qiang Li

2020 IEEE International Solid-State Circuits Conference - (ISSCC)

Year: 2020 | Conference Paper |

A 14-bit 4-MS/s VCO-Based SAR ADC With Deep Metastability Facilitated Mismatch Calibration

Zheng Zhu;Xiong Zhou;Yuheng Du;Yao Feng;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2020 | Volume: 55, Issue: 6 | Journal Article |

Cited by: Papers (16)

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This article presents a 14-bit 4-MS/s voltage-controlled oscillator (VCO)-based successive approximation register (SAR) analog-to-digital converter (ADC), where the metastability of the VCO-based comparator is exploited for the background calibration of mismatch errors. A closed-form behavioral analysis of VCO-based comparators has been studied in the presence of noise, showing that the metastabil...Show More

A 14-bit 4-MS/s VCO-Based SAR ADC With Deep Metastability Facilitated Mismatch Calibration

Zheng Zhu;Xiong Zhou;Yuheng Du;Yao Feng;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2020 | Volume: 55, Issue: 6 | Journal Article |

A Multi-Slice VCO-based Quantizer for On-Chip Power Supply Noise Analysis Achieving 0.11 (mV)2/sqrt(MHz) Noise Floor

Pengfei Zhai;Xiong Zhou;Yan Cai;Zheng Zhu;Fan Zhang;Zixiao Lin;Qiang Li

2019 IEEE Asian Solid-State Circuits Conference (A-SSCC)

Year: 2019 | Conference Paper |

Cited by: Papers (2)

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This paper presents a multi-slice VCO-based quantizer (MSVQ) for high-resolution power supply noise analysis. To relax the trade-off between accuracy and measurement time, a multi-slice quantizer at a relatively higher sampling rate is proposed, and the auto-covariance replaces the autocorrelation to obtain PSD while immunes the spurs introduced by the quantizers itself and further reduces noise f...Show More

A Multi-Slice VCO-based Quantizer for On-Chip Power Supply Noise Analysis Achieving 0.11 (mV)2/sqrt(MHz) Noise Floor

Pengfei Zhai;Xiong Zhou;Yan Cai;Zheng Zhu;Fan Zhang;Zixiao Lin;Qiang Li

2019 IEEE Asian Solid-State Circuits Conference (A-SSCC)

Year: 2019 | Conference Paper |

A 99.2 dB SNDR Feedforward Delta-Sigma Modulator with Build-In Summation Quantizer

Chao Liang;Xiong Zhou;Qiang Li

2019 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

Year: 2019 | Conference Paper |

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A new type of quantizer with build-in weighted summation function is proposed for replacing summer in feedforward delta sigma modulators. To verify the validity, a 2nd-order 8-level modulator based on this quantizer has been implemented in 180 nm CMOS technology. Simulation results show that the modulator achieves a 99.2 dB SNDR in 25 kHz bandwidth while consumes 1.56 mW under 1.8 V supply.Show More

A 99.2 dB SNDR Feedforward Delta-Sigma Modulator with Build-In Summation Quantizer

Chao Liang;Xiong Zhou;Qiang Li

2019 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

Year: 2019 | Conference Paper |

A Loss-Compensated 5-Bit Ka-Band Digital Phase Shifter with Low RMS Phase/Gain Error Over Wide Temperature Ranges

Ruoman Yang;Chao Liu;Xiangyu Zhao;Sheng Chang;Xiong Zhou;Qiang Li

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2019 | Conference Paper |

Cited by: Papers (3)

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This paper presents the design and demonstration of a 5-bit Ka-band phase shifter with amplifiers to compensate for the passive loss using a 0.13-μm SiGe BiCMOS technology. Adopting the switched low-pass (LP)/high-pass (HP) networks in the phase shift stages, the phase shifter exhibits measured RMS phase and gain errors less than 4° and 0.6 dB, respectively, within the frequency range of 30-40 GHz...Show More

A Loss-Compensated 5-Bit Ka-Band Digital Phase Shifter with Low RMS Phase/Gain Error Over Wide Temperature Ranges

Ruoman Yang;Chao Liu;Xiangyu Zhao;Sheng Chang;Xiong Zhou;Qiang Li

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2019 | Conference Paper |

A 12-bit 30MS/s SAR ADC with VCO-Based Comparator and Split-and-Recombination Redundancy for Bypass Logic

Sheng Chang;Xiong Zhou;Zhaoming Ding;Qiang Li

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2019 | Conference Paper |

Cited by: Papers (2)

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This paper presents a 12-bit asynchronous successive approximation register (SAR) analog-to-digital converter (ADC) implemented in 40nm CMOS technology. A VCO-based comparator is employed to adjust the noise level adaptively and its oscillation number is harnessed to bypass unnecessary cycles for saving energy. A 1-bit split-and-recombination redundancy and a digital error correction for bypass lo...Show More

A 12-bit 30MS/s SAR ADC with VCO-Based Comparator and Split-and-Recombination Redundancy for Bypass Logic

Sheng Chang;Xiong Zhou;Zhaoming Ding;Qiang Li

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

Year: 2019 | Conference Paper |

Inverter-Based Subthreshold Amplifier Techniques and Their Application in 0.3-V $\Delta\Sigma$ -Modulators

Lishan Lv;Xiong Zhou;Zhiliang Qiao;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2019 | Volume: 54, Issue: 5 | Journal Article |

Cited by: Papers (65)

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Subthreshold amplifiers suffer from the limited voltage headroom which leaves little space for conventional analog techniques to enhance performance and efficiency. This paper presents an evolution process of implementing conventional structures with inverters, allowing ultralow-voltage operation with increased flexibility in adopting traditional circuit techniques. Based on the proposed inverter-...Show More

Inverter-Based Subthreshold Amplifier Techniques and Their Application in 0.3-V $\Delta\Sigma$ -Modulators

Lishan Lv;Xiong Zhou;Zhiliang Qiao;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2019 | Volume: 54, Issue: 5 | Journal Article |

A 0.5–1.1-V Adaptive Bypassing SAR ADC Utilizing the Oscillation-Cycle Information of a VCO-Based Comparator

Zhaoming Ding;Xiong Zhou;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2019 | Volume: 54, Issue: 4 | Journal Article |

Cited by: Papers (38)

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A successive approximation register (SAR) analog-to-digital converter (ADC) with a voltage-controlled oscillator (VCO)-based comparator is presented in this paper. The relationship between the input voltage and the number of oscillation cycles (NOC) to reach a VCO-comparator decision is explored, implying an inherent coarse quantization in parallel with the normal comparison. The NOC as a design p...Show More

A 0.5–1.1-V Adaptive Bypassing SAR ADC Utilizing the Oscillation-Cycle Information of a VCO-Based Comparator

Zhaoming Ding;Xiong Zhou;Qiang Li

IEEE Journal of Solid-State Circuits

Year: 2019 | Volume: 54, Issue: 4 | Journal Article |

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