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| 1 | A 6.2–9.5 GHz receiver for Wimedia MB-OFDM and China UWB standard显示文摘An integrated 6.2–9.5 GHz UWB receiver for both WiMedia MB-OFDM and China UWB standard is proposed. The receiver can cover Group#3, Group#4 for WiMedia and Group#2–5 for China UWB standard respectively. The fully differential receiver consists of a wideband LNA and a down conversion mixer with high gain and low gain mode. A low-pass filter with controllable gain and cut-o? frequency along with a programmable gain amplifier are also included. The chip was fabricated in TSMC 0.13-μm RF CMOS process. Measurement results show that the receiver achieves voltage gain from 21 to 69 dB with 2 dB/step and an NF of 3.2–4.6 dB over 6.2–9.5 GHz and 1-dB compression point of ?21 dBm. The intermediate frequency of the receiver can be switched between 264 and 132 MHz, which enables the receiver applicable for both WiMedia and China UWB standard. Power consumption is only 47 mA with 1.2–V supply voltage. | GAO Ting ZHOU Feng LI Wei LAN Fei LINing REN JunYan | 2011 | Science China(Information Sciences)2011，54，2： | 4 |
| 2 | A current-mode RF transmitter for 6–9 GHz MB-OFDM UWB application显示文摘This paper presents a current-mode 6–9 GHz RF transmitter for MB-OFDM UWB systems. The proposed current-mode transmitter consists of current-mode IQ LPF, current mirror amplifier, IQ up-conversion mixer (up-mixer), differential power driver amplifier (PA) and high-speed divider with LO buffers for generating IQ LO signals. All circuits are designed to possess high linearity and wide bandwidth. The transmitter is fabricated in TSMC 0.13 μm 1P8M RF CMOS technology with a die area of 1.56 mm2. Measurement results show that a maximum output power of -0.7 dBm with an LO leakage/sideband rejection ratio (LOL/SB RR) around -33/ - 35 dBc is achieved, and that this transmitter excels the traditional voltage-mode counterpart in terms of high linearity (about +1 dBm output 1-dB compression point, +10 dBm output IP3 in average) with comparable power consumption (drawing 48 mA current from 1.2 V supply). | CHEN YunFeng FAN JinHan LI Wei LINing REN JunYan | 2011 | Science China(Information Sciences)2011，54，2： | 2 |
| 3 | A Three - Stage Operational Amplifier for a Wide Range of Capaetive Loads 显示文摘 | Hu Jingjing Huijsing J H Ren Junyan | 2007 | Chinese Journal of Semieonduetors2007，28，11： | 1 |
| 4 | A 900MHz CMOS PLL frequency synthesizer in/tialization circuit 显示文摘 | Zhao Hui Ren Junyan | 2003 | Chinese Journal of Semiconductors2003，24，12： | 1 |
| 5 | A 71mW 8b 125MSample/s A/D Converter显示文摘 | Wang Zhaogang Chen Cheng Ren Junyan | 2004 | Chinese Journal of Semiconductors2004，25，1： | 1 |
| 6 | COVID-19 reinfection in the presence of neutralizing antibodies显示文摘Due to the high transmissibility of the SARS-CoV-2 virus,it continues to infect over 300000 people worldwide per day(WHO statistics,December 2020),even almost one year after the first COVID-19 cases were confirmed[1,2].One of the most important public health discussions being undertaken currently concerns the protective nature of the immune response and the possibility of reinfection in recovered individuals. | Ju Zhang Nan Ding Lili Ren Rui Song Danying Chen Xuesen Zhao Budong Chen Junyan Han Jiarui Li Yangzi Song Lin Di Kai Han Fengting Yu Ruming Xie Zhihai Chen Wen Xie Jingyuan Liu Shan Cen Yuhai Bi Angela R.Wu Fujie Zhang Chen Chen Hui Zeng | 2021 | National Science Review2021，8，4： | 1 |
| 7 | Extracellular ADP facilitates monocyte recruitment in bacterial infection via ERK signaling显示文摘As the most prominent clinical drug targets for the inhibition of platelet aggregation, P2Y12 and P2Y13 have been found to be highly expressed in both platelets and macrophages. However, the roles and function of P2Y12/13 in the regulation of macrophage-mediated innate immune responses remain unclear. Here, we demonstrate that adenosine 5′-diphosphate (ADP), the endogenous ligand of P2Y1, P2Y12 and P2Y13, was released both in E. coli-infected mice and from macrophages treated with either lipopolysaccharide (LPS) or Pam3CSK4. Furthermore, the expression of P2Y13 was clearly increased in both LPS-treated macrophages and tuberculosis patients. ADP protected mice from E. coli 0111-induced peritonitis by recruiting more macrophages to the infected sites. Consistent with this, ADP and ADP-treated cell culture medium attracted more macrophages in the transwell assay by enhancing the expression of MCP-1. Nevertheless, P2Y1 is dispensable for ADP-mediated protection against bacterial infection. However, either P2Y12/P2Y13 deficiency or blocking the downstream signaling of P2Y12/P2Y13 blocked the ADP-mediated immune response and allowed more bacteria to persist in the infected mice. Furthermore, extracellular signal-regulated kinase (ERK) phosphorylation was clearly increased by ADP, and this type of activation could be blocked by either forskolin or analogs of cyclic AMP (cAMP) (for example, 8-bromo-cAMP). Accordingly, ADP-induced MCP-1 production and protection against bacterial infection could also be reduced by U0126, forskolin and 8-bromo-cAMP. Overall, our study reveals a relationship between danger signals and innate immune responses, which suggests the potential therapeutic significance of ADP-mediated purinergic signaling in infectious diseases. | Xiaoyu Zhang Juliang Qin Junyan Zou Zhangsheng Lv Binghe Tan Jueping Shi Yihan Zhao Hua Ren Mingyao Liu Min Qian Bing Du | 2018 | Cellular & Molecular Immunology2018，15，1： | 1 |
| 8 | A 900 MHz CMOS PLL frequency synthesizer irtialization circuit 显示文摘 | ZHAO Hui REN Junyan | 2003 | Chinese Journal of Semiconductors2003，24，12： | 1 |
| 9 | An Implementation of a CMOS Down-Conversion Mixer for GSM1900 Receivers 显示文摘 | Chu Fangqing Li Wei Su Yanfeng and Ren Junyan | 2006 | Chinese Journal of Semiconductors2006，3，： | 1 |
| 10 | A pow- er-efficient 10 bit 40 MS/s sub-sampling pipelined CMOS analog-to-digital converter显示文摘 | Shu Guanghua Guo Yao Ren Junyan | 2011 | Analog Integr Cite Sig Process2011，67，： | 1 |
| 11 | A Power-efficient 10-bit 40-MS/s Sub-sampling Pipelined CMOS Analog- to-digital Converter显示文摘 | Shu Guanghua Guo Yao Ren Junyan | 2011 | Analog Integrated Circuits Signal Processing2011，67，1： | 1 |
| 12 | A monolithic K-band phase-locked loop for microwave radar application显示文摘A monolithic K-band phase-locked loop(PLL) for microwave radar application is proposed and implemented in this paper. By eliminating the tail transistor and using optimized high-Q LC-tank, the proposed voltage-controlled oscillator(VCO) achieves a tuning range of 18.4 to 23.3 GHz and reduced phase noise. Two cascaded current-mode logic(CML) divide-by-two frequency prescalers are implemented to bridge the frequency gap, in which inductor peaking technique is used in the first stage to further boost allowable input frequency.Six-stage TSPC divider chain is used to provide programmable division ratio from 64 to 127, and a second-order passive loop filter with 825 kHz bandwidth is also integrated on-chip to minimize required external components.The proposed PLL needs only approximately 18.2 μs settling time, and achieves a wide tuning range from 18.4 to 23.3 GHz, with a typical output power of –0.84 dBm and phase noise of 91:92 d Bc/Hz @ 1 MHz. The chip is implemented in TSMC 65 nm CMOS process, and occupies an area of 0.56 mm^2 without pads under a 1.2 V single voltage supply. | Guangyao Zhou Shunli Ma Ning Li Fan Ye Junyan Ren | 2017 | Journal of Semiconductors2017，38，2： | 0 |
| 13 | Thinking about Development of Blockchain显示文摘Understanding the blockchain The global enthusiasm for blockchain was sparked by Bitcoin,which has been the most successful application of this te-chnology to date.Satoshi Nakamoto’s article,Bitcoin:A Peer-to-Peer Electronic Cash System,although specific to Bitcoin,remains the leading literature for the study of blockchain technology.This article therefore uses Nakamoto’s paper as the theoretical basis,and Bitcoin as a case study,for a new analysis in the nature of blockchain. | HAN Junyan REN Siming LIU Weichao | 2020 | China Economic Transition2020，3，2： | 0 |
| 14 | Digital Economy Development,Institutional Quality and Upstreamness of Global Value Chains显示文摘By building a composite index for measuring national digital economy development and sectoral digital intensities,this paper derives metrics of industry-level digital economy penetration under the framework of specialization within global value chains(GVCs),systematically analyzes the mechanisms through which digital economy development affects GVCs upstreamness,and examines the moderating effect of institutional quality.The study shows that different dimensions of digital economy development significantly boost GVCs upstreamness,a conclusion that holds even after accounting for endogeneity through dynamic panel models with instrumental variables based on past data.Further research shows that technological innovation capabilities and resource allocation efficiency have gradually become important channels for digital economy development to boost GVCs upstreamness.Adding indicators on institutional quality reveals that greater institutional quality not only directly promotes GVCs upstreamness but also reinforces the impact of digital economy development on higher GVCs positioning. | QI Junyan REN Yida | 2022 | Frontiers of Economics in China-Selected Publications from Chinese Universities2022，17，1： | 0 |
| 15 | Innate immune imprints in SARS-CoV-2 Omicron variant infection convalescents显示文摘SARS-CoV-2 Omicron variant infection generally gives rise to asymptomatic to moderate COVID-19 in vaccinated people.The immune cells can be reprogrammed or“imprinted”by vaccination and infections to generate protective immunity against subsequent challenges.Considering the immune imprint in Omicron infection is unclear,here we delineate the innate immune landscape of human Omicron infection via single-cell RNA sequencing,surface proteome profiling,and plasma cytokine quantification.We found that monocyte responses predominated in immune imprints of Omicron convalescents,with IL-1β-associated and interferon(IFN)-responsive signatures with mild and moderate symptoms,respectively.Low-density neutrophils increased and exhibited IL-1β-associated and IFN-responsive signatures similarly.Mild convalescents had increased blood IL-1β,CCL4,IL-9 levels and PI3+neutrophils,indicating a bias to IL-1βresponsiveness,while moderate convalescents had increased blood CXCL10 and IFN-responsive monocytes,suggesting durative IFN responses.Therefore,IL-1β-or IFN-responsiveness of myeloid cells may indicate the disease severity of Omicron infection and mediate post-COVID conditions. | Zhiqing Li Xiaosu Chen Junyan Dan Tianju Hu Ye Hu Shuxun Liu Yangyang Chai Yansong Shi Jian Wu Hailai Ni Jiaqi Zhu Yanfeng Wu Nan Li Yizhi Yu Zhongfang Wang Jincun Zhao Nanshan Zhong Xianwen Ren Zhongyang Shen Xuetao Cao | 2022 | Signal Transduction and Targeted Therapy2022，7，12： | 0 |
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