摘要：A novel clock structure of a low-power 16-bit very large instruction word (VLIW) digital signal processor (DSP) was proposed. To improve deterministic clock gating and to solve the drawback of conventional clock gating circuit in high speed circuit, a distributed and early clock gating method was developed on its instruction fetch & decoder unit, its pipelined data-path unit and its super-Harvard memory interface unit. The core was implemented following the Synopsys back-end flow under TSMC (Taiwan Silicon manufacture corporation) 0.18-μm 1.8-V 1P6M process, with a core size of 2 mm×2 mm. Result shows that it can run under 200 MHz with a power performance around 0.3 mW/MIPS. Meanwhile, only 39.7% circuit is active simultaneously in average, compared to its non-gating counterparts.

摘要：钙钛矿太阳能电池(PSCs)的界面接触缺陷是影响其性能的重要因素,会引发迟滞效应从而降低转换效率(PCE)并使器件运行稳定性恶化.界面材料通常被用于消除界面缺陷,然而设计兼具优越电荷传输和缺陷钝化能力的高效界面分子仍然面临挑战.本文研究了四种新型推-拉型富勒烯二聚体DC_(60)-R1-R2(R1=H或Cl,R2=H或MeO),并将其作为金属氧化物和钙钛矿之间的界面层.这些富勒烯二聚体之间的极性取代基决定了分子间的相互作用,DC_(60)-Cl-MeO由于其吸电子基团(-Cl)与给电子基团(-MeO)之间最强的电子推拉效应,表现出最佳的电荷传输和缺陷钝化能力.DC_(60)-Cl-MeO作为界面材料的未封装平面结构(FAPbI3)x(MAPbBr3)1-xPSC获得最高23.3%的PCE,且无迟滞现象,即使在高湿环境中储存500小时后仍能保持接近100%的初始效率.在一个太阳光强度下,无需任何封装或者惰性气体保护,钙钛矿太阳能电池在最大功率点连续运行的外推TS80寿命(效率下降到初始值的80%)从参比器件的0.5小时延长到1110小时.推-拉型富勒烯分子是极具潜力的钙钛矿太阳能电池界面材料.

摘要：Modern medicine is increasingly interested in advanced sensors to detect and analyze biochemical *** sensors based on potentiometric methods are a promising platform for monitoring physiological ions in biological *** semi-implantable devices are mainly based on single-parameter *** semi-implantable electrodes for multiparameter sensing have more restrictions on the electrode size due to biocompatibility considerations,but reducing the electrode surface area could potentially limit electrode *** study developed a semi-implantable device system comprising a multiplexed microfilament electrode cluster(MMEC)and a printed circuit board for real-time monitoring of intra-tissue K^(+),Ca^(2+),and Na^(+)*** electrode surface area was less important for the potentiometric sensing mechanism,suggesting the feasibility of using a tiny fiber-like electrode for potentiometric *** MMEC device exhibited a broad linear response(K^(+):2–32 mmol/L;Ca^(2+):0.5–4 mmol/L;Na^(+):10–160 mmol/L),high sensitivity(about 20–45 mV/decade),temporal stability(>2weeks),and good selectivity(>80%)for the above *** vitro detection and in vivo subcutaneous and brain experiment results showed that the MMEC system exhibits good multi-ion monitoring performance in several complex *** work provides a platform for the continuous real-time monitoring of ion fluctuations in different situations and has implications for developing smart sensors to monitor human health.

摘要：Based on a stochastic wire length distributed model, the interconnect distribution of a three-dimensional integrated circuit （3D IC） is predicted exactly. Using the results of this model, a global interconnect design window for a giga-scale system-on-chip （SOC） is established by evaluating the constraints of 1） wiring resource, 2） wiring bandwidth, and 3） wiring noise. In comparison to a two-dimensional integrated circuit （2D IC） in a 130-nm and 45-nm technology node, the design window expands for a 3D IC to improve the design reliability and system performance, further supporting 3D IC application in future integrated circuit design.

摘要：GaAs-based planar Gunn diodes with A1GaAs hot electron injector have been successfully developed to be used as a local oscillator of 76 GHz in monolithic millimeter-wave integrated circuits. We designed two kinds of structure diode, one has a fixed distance between the anode and cathode, but has variational cathode area, the other has a fixed cathode area, but has different distances between two electrodes. The fabrication of Gunn diode is performed in accordance with the order of operations： cathode defining, mesa etching, anode defining, isolation, passivation, via hole and electroplating. A peak current density of 29.5 kA/cm^2 is obtained. And the charavteristics of negative differential resistance and the asymmetry of the current-voltage curve due to the A1GaAs hot electron injector are discussed in detail. It is demonstrated that the smaller size of active area corresponds to the smaller current, and the shorter distance between anode and cathode also corresponds to the lower threshold voltage and higher peak current, and hot electron injector can effectively enhance the radio frequency conversion efficiency and output power.

摘要：Through-silicon-via （TSV） to TSV crosstalk noise is one of the key factors affecting the signal integrity of three- dimensional integrated circuits （3D ICs）. Based on the frequency dependent equivalent electrical parameters for the TSV channel, an analytical crosstalk noise model is established to capture the TSV induced crosstalk noise. The impact of various design parameters including insulation dielectric, via pitch, via height, silicon conductivity, and terminal impedance on the crosstalk noise is analyzed with the proposed model. Two approaches are proposed to alleviate the TSV noise, namely, driver sizing and via shielding, and the SPICE results show 241 rnV and 379 mV reductions in the peak noise voltage, respectively.

摘要：A voltage-controlled oscillator（VCO） with dual stages of accumulation mode varactors for a multimode global navigation satellite system（GNSS） application,which adopts sigma-delta fractional-N technology in the synthesizer,is *** structure is selected to optimize the frequency coverage and tuning linearity, based on a general analysis of the parasitic capacitance in the coarse tuning switch bank cells,which cover the global positioning system（GPS） and Beidou（BD） *** VCO implemented in the 0.18μm CMOS process can cover the GPS L1,BD B1,B2 and B3 bands with sufficient margin,and exhibits low phase noise by using this tuning curve linearization *** equalized K_（vco）,characteristic behavior further offers a wide voltage tuning range and improves the stability of the closed loop.

摘要：电磁波在无线通信等领域的广泛应用导致了严重的电磁污染,迫切需要研发高性能电磁波吸收材料.本文针对吸波材料阻抗不匹配等关键问题,设计并成功制备了新型核壳LaOCl/LaFeO_(3)纳米纤维电磁波吸收剂.这种独特的一维多级结构由导电LaFeO_(3)磁性壳层和离子化合物LaOCl核层组成.基于介电-磁损耗耦合和阻抗匹配的协同作用,LaOCl/LaFeO_(3)纳米纤维在超低负载条件下(4 w t%),表现出-40.1 d B(2.0 mm)的反射损耗和6.4 GHz(2.4 mm)的有效吸收带宽.该工作提出了一种新型LaOCl/LaFeO_(3)纳米纤维吸波材料,并为阻抗匹配调控和电磁吸波性能优化开辟了新策略.

摘要：铝硫二次电池是一种具有高能量密度、廉价原材料、有前途的替代储能装置.然而,铝硫电池面临着一些障碍,尤其是穿梭效应.本工作设计了一种硫分散均匀的无粘结剂S@Ti_(3)C_(2)T_(x)三明治结构薄膜.二维层状材料Ti_(3)C_(2)T_(x)不仅具有粘结剂和导电剂的功能,而且是一种很有前途的硫锚定载体.S@Ti_(3)C_(2)T_(x)膜在300 mA g^(−1)时显示出初始容量为489 mA h g^(−1),并在280圈稳定循环后保持为415 mA h g^(−1),平均库仑效率约为95%.该薄膜的容量和稳定性均高于采用浆料涂覆法制备的S+Ti_(3)C_(2)T_(x)正极(初始容量为317 mA h g^(−1),循环160圈后衰减为222 mA h g^(−1)).S@Ti_(3)C_(2)T_(x)膜在铝硫电池中的容量主要来源于S^(2−)和S之间的可逆氧化还原反应.这种新颖的二维材料与可控的电极结构设计相结合,为铝硫电池的发展铺平了道路.

摘要：The sieving and enrichment of rare tumor cells from large-volume pleural effusion(PE)samples is a promising technique for cell-based lung tumor diagnosis and drug tests,which features high throughput and recovery,purification,as well as viability rates of rare target cells as the prerequisites for high sensitivity,specificity,and accuracy of tumor cell *** this paper,we propose a three-dimensional(3 D)sieving method for rare tumor cell enrichment,which effectively eliminates the"dead zones"in traditional two-dimensional(2 D)cell filters with a dimension-raising strategy to satisfy the requirements mentioned *** prototype device was combined with a funnel-shaped holder,a flexible micropore membrane in the middle,and a3 D spiral fluid channel covered on the membrane as a three-layer ice-creaming cone composite *** by gravity alone,the device performed as follows:(1)20-fold throughput compared with the 2 D commercial planee hich was up to 20 mL/min for a threefold dilution of whole blood sample;(2)high recovery rates of 84.5%±21%,86%±25%,83%±14%for 100,1000,and 10000 cells/mL,respectively,in 30 mL phosphate buffer saline(PBS)sample,and a 100%positive detection rate in the case of≤5 A549 cells in 1 mL PBS;(3)a typical purification rate of 85.5%±9.1%;and(4)a viability rate of>93%.In the demonstration application,this device effectively enriched rare target cells from large volumes(>25 mL)of clinical pleural *** following results indicated that tumor cells were easy-to-discover in the enriched PE samples,and the proliferation capability of purified cells was(>4.6 times)significantly stronger than that of unprocessed cells in the subsequent 6-day *** above evaluation indicates that the proposed easily reproducible method for the effective execution of rare cell enrichments and assays is expected to become a practical technique for clinical cell-based tumor diagnosis.