本文提出一种多协议,可变位宽发射机系统,最高数据位宽40 bits,最高数据速率10.312 5 Gbps.整个系统由归一化数据位宽(Normalization of Data Width,NMDW)变换电路,40:1合路器(MUX),时钟分布电路及3抽头前馈均衡器(Feed-Forward-Equaliz...本文提出一种多协议,可变位宽发射机系统,最高数据位宽40 bits,最高数据速率10.312 5 Gbps.整个系统由归一化数据位宽(Normalization of Data Width,NMDW)变换电路,40:1合路器(MUX),时钟分布电路及3抽头前馈均衡器(Feed-Forward-Equalizer,FFE)组成,文章中提出了改进的40:1 MUX电路结构.本文采用SMIC 40 nm CMOS工艺,电源电压1.1 V.发射机(Transmitter,TX)整体功耗34mW@10.3125 Gbps,信道前差分输出眼图最大幅度大于800 mV.同时,本发射机支持4种不同协议,7种不同数据速率,9种工作状态,工作温度范围-45℃~125℃.展开更多
在基于现场可编程门阵列(FPGA)的设计中,低延时、高吞吐量、小面积是3个主要考虑因素。针对以上因素,提出不同基数SRT浮点除法和开方算法,设计基于Virtex-II pro FPGA的可变位宽浮点除法和开方的3种实现方案,包括小面积的迭代实现、低...在基于现场可编程门阵列(FPGA)的设计中,低延时、高吞吐量、小面积是3个主要考虑因素。针对以上因素,提出不同基数SRT浮点除法和开方算法,设计基于Virtex-II pro FPGA的可变位宽浮点除法和开方的3种实现方案,包括小面积的迭代实现、低延时的阵列实现和高吞吐量的流水实现。实验结果表明,对于浮点除法和开方算法的流水实现,在综合面积符合要求的基础上,实现频率最高分别可达到180 MHz和200 MHz以上,证明了该实现方案的有效性。展开更多
A 2 5GHz fully integrated LC VCO is fabricated in a standard single poly 4 metal 0 35μm digital CMOS process,using a complementary cross coupled topology for lowering power dissipation and reducing the effect of...A 2 5GHz fully integrated LC VCO is fabricated in a standard single poly 4 metal 0 35μm digital CMOS process,using a complementary cross coupled topology for lowering power dissipation and reducing the effect of 1/ f noise.An on chip LC filtering technique is used to lower the high frequency noise.Accumulation varactors are used to widen frequency tuning.The measured tuning range is 23 percent.A single hexadecagon symmetric on chip spiral is used with grounded shield pattern to reduce the chip area and maximize the quality factor.A phase noise of -118dBc/Hz at 1MHz offset is measured.The power dissipation is 4mA at V DD =3 3V.展开更多
The wideband CMOS voltage-controlled oscillator（VCO）with low phase noise and low power consumption is presented for a DRM/DAB（digital radio mondiale and digital audio broadcasting）frequency synthesizer.In order to...The wideband CMOS voltage-controlled oscillator（VCO）with low phase noise and low power consumption is presented for a DRM/DAB（digital radio mondiale and digital audio broadcasting）frequency synthesizer.In order to obtain a wide band and a large tuning range,a parallel switched capacitor bank is added in the LC tank.The proposed VCO is implemented in SMIC 0.18-μm RF CMOS technology and the chip area is 750 μm×560 μm,including the test buffer circuit and the pads.Measured results show that the tuning range is 44.6%;i.e.,the frequency turning range is from 2.27 to 3.57 GHz.The measured phase noise is-122.22 dBc/Hz at a 1 MHz offset from the carrier.The maximum power consumption of the core part is 6.16 mW at a 1.8 V power supply.展开更多
AIM: To investigate the liver stiffness measurement (LSM) applicability and variability with reference to three probe positions according to the region of liver biopsy. METHODS: The applicability for LSM was defined a...AIM: To investigate the liver stiffness measurement (LSM) applicability and variability with reference to three probe positions according to the region of liver biopsy. METHODS: The applicability for LSM was defined as at least 10 valid measurements with a success rate greater than 60% and an interquartile range/median LSM < 30%. The LSM variability compared the inter-position concordance and the concordance with FibroTest. RESULTS: Four hundred and forty two consecutive patients were included. The applicability of the anterior position (81%) was significantly higher than that of the reference (69%) and lower positions (68%), (both P = 0.0001). There was a signif icant difference (0.5 kPa, 95% CI 0.13-0.89; P < 0.0001) between mean LSM estimated at the reference position (9.3 kPa) vs the anterior position (8.8 kPa). Discordance between positions was associated with thoracic fold (P = 0.008). The discordance rate between the reference position result and FibroTest was higher when the 7.1 kPa cutoff was used to define advanced fibrosis instead of 8.8 kPa (33.6% vs 23.5%, P = 0.03).CONCLUSION: The anterior position of the probe should be the fi rst choice for LSM using Fibroscan, as it has a higher applicability without higher variability compared to the usual liver biopsy position.展开更多
The deformation of landslide is usually expressed in horizontal and vertical direction separately. Based on the X, Y, Z coor-dinates from a real monitoring project, a method to build three-dimensional(3D) model of lan...The deformation of landslide is usually expressed in horizontal and vertical direction separately. Based on the X, Y, Z coor-dinates from a real monitoring project, a method to build three-dimensional(3D) model of landslide by constructing triangulated ir-regular network (TIN) and extruding contour lines is proposed. The almost imperceptible displacements of monitoring points are zoomed by two kind of exaggerating methods. The deformation process is replayed using 3D animation technique.展开更多
This study examined gender differences in the cognition of the changeability of different parts of the body. The body was divided into six parts： ＂eyes＂, ＂hair＂, ＂upper body＂, ＂lower body＂, ＂facial features...This study examined gender differences in the cognition of the changeability of different parts of the body. The body was divided into six parts： ＂eyes＂, ＂hair＂, ＂upper body＂, ＂lower body＂, ＂facial features＂, and ＂skin＂, and male and female cognition about the changeability of each body part was compared. The participants were 205 undergraduate students （145 female students and 60 male studentsl） enrolled in a university in Japan. The female and male students showed a similarity in their cognition of＂hair＂ as easily changeable and ＂facial features＂ as difficult to change. In addition, there was a difference between the male and female students in the cognition of the changeability of the ＂eyes＂, with the females perceiving a high level of changeability and men, a low changeability. This result suggests that female students believe in the effectiveness of makeup for covering cosmetic flaws of the eye.展开更多
文摘在基于现场可编程门阵列(FPGA)的设计中,低延时、高吞吐量、小面积是3个主要考虑因素。针对以上因素,提出不同基数SRT浮点除法和开方算法,设计基于Virtex-II pro FPGA的可变位宽浮点除法和开方的3种实现方案,包括小面积的迭代实现、低延时的阵列实现和高吞吐量的流水实现。实验结果表明,对于浮点除法和开方算法的流水实现,在综合面积符合要求的基础上,实现频率最高分别可达到180 MHz和200 MHz以上,证明了该实现方案的有效性。
文摘A 2 5GHz fully integrated LC VCO is fabricated in a standard single poly 4 metal 0 35μm digital CMOS process,using a complementary cross coupled topology for lowering power dissipation and reducing the effect of 1/ f noise.An on chip LC filtering technique is used to lower the high frequency noise.Accumulation varactors are used to widen frequency tuning.The measured tuning range is 23 percent.A single hexadecagon symmetric on chip spiral is used with grounded shield pattern to reduce the chip area and maximize the quality factor.A phase noise of -118dBc/Hz at 1MHz offset is measured.The power dissipation is 4mA at V DD =3 3V.
文摘The wideband CMOS voltage-controlled oscillator（VCO）with low phase noise and low power consumption is presented for a DRM/DAB（digital radio mondiale and digital audio broadcasting）frequency synthesizer.In order to obtain a wide band and a large tuning range,a parallel switched capacitor bank is added in the LC tank.The proposed VCO is implemented in SMIC 0.18-μm RF CMOS technology and the chip area is 750 μm×560 μm,including the test buffer circuit and the pads.Measured results show that the tuning range is 44.6%;i.e.,the frequency turning range is from 2.27 to 3.57 GHz.The measured phase noise is-122.22 dBc/Hz at a 1 MHz offset from the carrier.The maximum power consumption of the core part is 6.16 mW at a 1.8 V power supply.
文摘AIM: To investigate the liver stiffness measurement (LSM) applicability and variability with reference to three probe positions according to the region of liver biopsy. METHODS: The applicability for LSM was defined as at least 10 valid measurements with a success rate greater than 60% and an interquartile range/median LSM < 30%. The LSM variability compared the inter-position concordance and the concordance with FibroTest. RESULTS: Four hundred and forty two consecutive patients were included. The applicability of the anterior position (81%) was significantly higher than that of the reference (69%) and lower positions (68%), (both P = 0.0001). There was a signif icant difference (0.5 kPa, 95% CI 0.13-0.89; P < 0.0001) between mean LSM estimated at the reference position (9.3 kPa) vs the anterior position (8.8 kPa). Discordance between positions was associated with thoracic fold (P = 0.008). The discordance rate between the reference position result and FibroTest was higher when the 7.1 kPa cutoff was used to define advanced fibrosis instead of 8.8 kPa (33.6% vs 23.5%, P = 0.03).CONCLUSION: The anterior position of the probe should be the fi rst choice for LSM using Fibroscan, as it has a higher applicability without higher variability compared to the usual liver biopsy position.
文摘The deformation of landslide is usually expressed in horizontal and vertical direction separately. Based on the X, Y, Z coor-dinates from a real monitoring project, a method to build three-dimensional(3D) model of landslide by constructing triangulated ir-regular network (TIN) and extruding contour lines is proposed. The almost imperceptible displacements of monitoring points are zoomed by two kind of exaggerating methods. The deformation process is replayed using 3D animation technique.
文摘This study examined gender differences in the cognition of the changeability of different parts of the body. The body was divided into six parts： ＂eyes＂, ＂hair＂, ＂upper body＂, ＂lower body＂, ＂facial features＂, and ＂skin＂, and male and female cognition about the changeability of each body part was compared. The participants were 205 undergraduate students （145 female students and 60 male studentsl） enrolled in a university in Japan. The female and male students showed a similarity in their cognition of＂hair＂ as easily changeable and ＂facial features＂ as difficult to change. In addition, there was a difference between the male and female students in the cognition of the changeability of the ＂eyes＂, with the females perceiving a high level of changeability and men, a low changeability. This result suggests that female students believe in the effectiveness of makeup for covering cosmetic flaws of the eye.
