A 28/56 Gb/s NRZ/PAM-4 dual-mode transceiver(TRx)designed in a 28-nm complementary metal-oxide-semiconduc-tor(CMOS)process is presented in this article.A voltage-mode(VM)driver featuring a 4-tap reconfigurable feed-fo...A 28/56 Gb/s NRZ/PAM-4 dual-mode transceiver(TRx)designed in a 28-nm complementary metal-oxide-semiconduc-tor(CMOS)process is presented in this article.A voltage-mode(VM)driver featuring a 4-tap reconfigurable feed-forward equal-izer(FFE)is employed in the quarter-rate transmitter(TX).The half-rate receiver(RX)incorporates a continuous-time linear equal-izer(CTLE),a 3-stage high-speed slicer with multi-clock-phase sampling,and a clock and data recovery(CDR).The experimen-tal results show that the TRx operates at a maximum speed of 56 Gb/s with chip-on board(COB)assembly.The 28 Gb/s NRZ eye diagram shows a far-end vertical eye opening of 210 mV with an output amplitude of 351 mV single-ended and the 56 Gb/s PAM-4 eye diagram exhibits far-end eye opening of 33 mV(upper-eye),31 mV(mid-eye),and 28 mV(lower-eye)with an output amplitude of 353 mV single-ended.The recovered 14 GHz clock from the RX exhibits random jitter(RJ)of 469 fs and deterministic jitter(DJ)of 8.76 ps.The 875 Mb/s de-multiplexed data features 593 ps horizontal eye opening with 32.02 ps RJ,at bit-error rate(BER)of 10-5(0.53 UI).The power dissipation of TX and RX are 125 and 181.4 mW,respectively,from a 0.9-V sup-ply.展开更多
目的 研究3.0T磁共振平衡式快速场回波(balance fast field echo,B-FFE)和磁敏感加权成像(susceptibility weighted imaging,SWI)序列在胎儿脊柱方面的诊断价值,为产前诊断提供数据分析及参考。方法 甄选我院2019年10月至2020年3月产前...目的 研究3.0T磁共振平衡式快速场回波(balance fast field echo,B-FFE)和磁敏感加权成像(susceptibility weighted imaging,SWI)序列在胎儿脊柱方面的诊断价值,为产前诊断提供数据分析及参考。方法 甄选我院2019年10月至2020年3月产前诊断提示胎儿脊柱异常并已行超声检查54例孕妇。采用3.0T磁共振进行胎儿脊柱扫描,扫描序列包括轴冠矢三个位置的B-FFE和SWI序列,对两个序列诊断准确率、检查成功率进行对比分析,记录两序列特异性吸收率(the specific absorption rate,SAR)值。结果 54例患者中,B-FFE、SWI序列组诊断准确率分别为88.88%、70.37%,差异具有统计学意义(χ^(2)=5.708,P<0.05)。检查成功率方面:B-FFE、SW序列成功率分别为92.59%、55.56%,差异具有显著统计学意义(χ^(2)=21.027,P<0.001)。SAR值方面:B-FFE、SWI序列分别为2.0±0.05w/kg、<0.1 w/kg。结论 B-FFE与SWI序列对比,两者均能很好的显示胎儿脊柱问题图像,都具有较高的诊断准确率。B-FFE序列检查成功率更高、能获得稳定、清晰图像,在显示胎儿脊柱轮廓稍逊于SWI序列,SWI在显示胎儿腰骶段具有绝对优势,但检查成功率较低,两者结合扫描,能大大提高胎儿脊柱影像诊断准确率及检查完成率。展开更多
目的评价3D-Magnetic Resonance Cholangiopancreatography(MRCP)与Balance fast field echo(Balance-FFE)及常规MRI序列联合应用对梗阻性黄疸的诊断价值。方法 156例梗阻性黄疸患者行包括3D-MRCP、冠状位B-FFE、轴位T1WI、T2WI、T2压脂...目的评价3D-Magnetic Resonance Cholangiopancreatography(MRCP)与Balance fast field echo(Balance-FFE)及常规MRI序列联合应用对梗阻性黄疸的诊断价值。方法 156例梗阻性黄疸患者行包括3D-MRCP、冠状位B-FFE、轴位T1WI、T2WI、T2压脂,部分行同层动态增强检查。所有影像诊断结果与最终手术病理结果进行回顾对照分析。结果 156例病人分为3组,组Ⅰ结石94例,组Ⅱ肿瘤56例,组Ⅲ其它6例。3D-MRCP、B-FFE与常规MRI联合应用,定性诊断的符合率分别为100%、80.3%和100%,总符合率为92.9%。结论 3D-MRCP、B-FFE与常规MRI扫描序列联合应用通过观察直接征象和间接征象,对梗阻性黄疸的定性诊断有较高准确性。展开更多
基金supported by National Natural Science Foundation of China under Grant 62174132the Fundamental Research Funds for Central Universities under Grant xzy022022060.
文摘A 28/56 Gb/s NRZ/PAM-4 dual-mode transceiver(TRx)designed in a 28-nm complementary metal-oxide-semiconduc-tor(CMOS)process is presented in this article.A voltage-mode(VM)driver featuring a 4-tap reconfigurable feed-forward equal-izer(FFE)is employed in the quarter-rate transmitter(TX).The half-rate receiver(RX)incorporates a continuous-time linear equal-izer(CTLE),a 3-stage high-speed slicer with multi-clock-phase sampling,and a clock and data recovery(CDR).The experimen-tal results show that the TRx operates at a maximum speed of 56 Gb/s with chip-on board(COB)assembly.The 28 Gb/s NRZ eye diagram shows a far-end vertical eye opening of 210 mV with an output amplitude of 351 mV single-ended and the 56 Gb/s PAM-4 eye diagram exhibits far-end eye opening of 33 mV(upper-eye),31 mV(mid-eye),and 28 mV(lower-eye)with an output amplitude of 353 mV single-ended.The recovered 14 GHz clock from the RX exhibits random jitter(RJ)of 469 fs and deterministic jitter(DJ)of 8.76 ps.The 875 Mb/s de-multiplexed data features 593 ps horizontal eye opening with 32.02 ps RJ,at bit-error rate(BER)of 10-5(0.53 UI).The power dissipation of TX and RX are 125 and 181.4 mW,respectively,from a 0.9-V sup-ply.
文摘目的 研究3.0T磁共振平衡式快速场回波(balance fast field echo,B-FFE)和磁敏感加权成像(susceptibility weighted imaging,SWI)序列在胎儿脊柱方面的诊断价值,为产前诊断提供数据分析及参考。方法 甄选我院2019年10月至2020年3月产前诊断提示胎儿脊柱异常并已行超声检查54例孕妇。采用3.0T磁共振进行胎儿脊柱扫描,扫描序列包括轴冠矢三个位置的B-FFE和SWI序列,对两个序列诊断准确率、检查成功率进行对比分析,记录两序列特异性吸收率(the specific absorption rate,SAR)值。结果 54例患者中,B-FFE、SWI序列组诊断准确率分别为88.88%、70.37%,差异具有统计学意义(χ^(2)=5.708,P<0.05)。检查成功率方面:B-FFE、SW序列成功率分别为92.59%、55.56%,差异具有显著统计学意义(χ^(2)=21.027,P<0.001)。SAR值方面:B-FFE、SWI序列分别为2.0±0.05w/kg、<0.1 w/kg。结论 B-FFE与SWI序列对比,两者均能很好的显示胎儿脊柱问题图像,都具有较高的诊断准确率。B-FFE序列检查成功率更高、能获得稳定、清晰图像,在显示胎儿脊柱轮廓稍逊于SWI序列,SWI在显示胎儿腰骶段具有绝对优势,但检查成功率较低,两者结合扫描,能大大提高胎儿脊柱影像诊断准确率及检查完成率。
文摘目的评价3D-Magnetic Resonance Cholangiopancreatography(MRCP)与Balance fast field echo(Balance-FFE)及常规MRI序列联合应用对梗阻性黄疸的诊断价值。方法 156例梗阻性黄疸患者行包括3D-MRCP、冠状位B-FFE、轴位T1WI、T2WI、T2压脂,部分行同层动态增强检查。所有影像诊断结果与最终手术病理结果进行回顾对照分析。结果 156例病人分为3组,组Ⅰ结石94例,组Ⅱ肿瘤56例,组Ⅲ其它6例。3D-MRCP、B-FFE与常规MRI联合应用,定性诊断的符合率分别为100%、80.3%和100%,总符合率为92.9%。结论 3D-MRCP、B-FFE与常规MRI扫描序列联合应用通过观察直接征象和间接征象,对梗阻性黄疸的定性诊断有较高准确性。
