The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron micr...The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron microscope) combined with EDS (energy dispersive X-rayspectrometer), the Mn ions distributed at grain boundaries were analyzed. The results show that thePTCR effect of Mn-doped PTCR ceramics is more dependent on the sintering schedule than those of Mnfree. The phenomenon may be caused by the valence states variance of Mn ions segregated at the grainboundaries.展开更多
Network management system of LMDS system may be divided into two levels,one is for the whole network called NMS in which the whole access network is included,another is a tool to be used to monitor and configure the l...Network management system of LMDS system may be divided into two levels,one is for the whole network called NMS in which the whole access network is included,another is a tool to be used to monitor and configure the local remote terminals. Specific software can be developed,or one may just telnet to the展开更多
The electron transports in micro-architecture semiconductor are simulated using vertical SOI nMOSFET with different models. Some details in transport can be presented by changing channel length, channel thickness and ...The electron transports in micro-architecture semiconductor are simulated using vertical SOI nMOSFET with different models. Some details in transport can be presented by changing channel length, channel thickness and drain voltage. An interesting phenomenon similar to collimation effect in mesoscopic system is observed. This may suggest the quite intriguing possibility that scattering may open new channel in sufficiently narrow devices. Key words semiconductor - MOSFET - transport - mesoscopic system CLC number TN 303 - TN 304 Foundation item: Supported by the National Defense Foundation of China(99J2. 4. 1. JW0514)Biography: TONG Jian-nong(1961-), male, Ph. D candidate, Senior engineer, research direction: IC design.展开更多
A circuit architechure to realize clock recovery for fast Ethernet applications is presented, whick includies system architecture, modified MueUer Muller algorithm for 100BASE-TX, phase detector for 100BASE-TX and mul...A circuit architechure to realize clock recovery for fast Ethernet applications is presented, whick includies system architecture, modified MueUer Muller algorithm for 100BASE-TX, phase detector for 100BASE-TX and multiple output charge pump PLL. The clock recovery circuit is verified by TSMC 0.35um 1P5M CMOS process. The results show that this clock recovery circuit exactly extracts the timing information. It has advantages over others for simple and easy implementation.展开更多
基金This work is financially supported by the Postdoctoral Research Foundation of the Chinese Education Ministry (No. 023202238)
文摘The relationship of electrical properties of Mn-doped Ba_(0.92)Ca_(0.08)TiO_3PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules wasdiscussed. Using TEM (transmission electron microscope) combined with EDS (energy dispersive X-rayspectrometer), the Mn ions distributed at grain boundaries were analyzed. The results show that thePTCR effect of Mn-doped PTCR ceramics is more dependent on the sintering schedule than those of Mnfree. The phenomenon may be caused by the valence states variance of Mn ions segregated at the grainboundaries.
文摘Network management system of LMDS system may be divided into two levels,one is for the whole network called NMS in which the whole access network is included,another is a tool to be used to monitor and configure the local remote terminals. Specific software can be developed,or one may just telnet to the
文摘The electron transports in micro-architecture semiconductor are simulated using vertical SOI nMOSFET with different models. Some details in transport can be presented by changing channel length, channel thickness and drain voltage. An interesting phenomenon similar to collimation effect in mesoscopic system is observed. This may suggest the quite intriguing possibility that scattering may open new channel in sufficiently narrow devices. Key words semiconductor - MOSFET - transport - mesoscopic system CLC number TN 303 - TN 304 Foundation item: Supported by the National Defense Foundation of China(99J2. 4. 1. JW0514)Biography: TONG Jian-nong(1961-), male, Ph. D candidate, Senior engineer, research direction: IC design.
文摘A circuit architechure to realize clock recovery for fast Ethernet applications is presented, whick includies system architecture, modified MueUer Muller algorithm for 100BASE-TX, phase detector for 100BASE-TX and multiple output charge pump PLL. The clock recovery circuit is verified by TSMC 0.35um 1P5M CMOS process. The results show that this clock recovery circuit exactly extracts the timing information. It has advantages over others for simple and easy implementation.
