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A new method is proposed to distinguish the contributions of the low-frequency noise (LFN) from the channel and the source/drain Schottky contacts in MOS devices. The method is applied to back-gated nMOSFETs with MoS2 channel and Al2O3 gate dielectric. To avoid a possible noise signal contamination from the top MoS2 surface by oxygen or water molecules absorption, the nMOSFETs with multilayer MoS2...
Temperature is an important factor that limits the current-carrying capability of overhead transmission lines. An online estimation approach is proposed in this study to dynamically track the temperature of transmission lines and thereby fully use their capability. In the proposed approach, the temperature is represented as a function of the transmission loss and current. A Kaiman Filter model is...
We have succeeded in synthesizing AC waveforms with the rms voltage of greater than 10 V using an AC-programmable Josephson voltage standard (AC-PJVS) system. The system has a NbN-based junction array, which is cooled with a compact cryocooler. The array is composed of total 524 288 junctions, enabling to generate arbitrary signals with the maximum output level of about 17 V for 15.9 GHz microwave...
We are developing a calibration system for Zener voltage standards using a programmable Josephson voltage standard (PJVS) for the purposes of the reduction in liquid-helium consumption and also the improvement of the calibration performance. The PJVS array is composed of total 524 288 NbN-based Josephson junctions and is cooled with a 10 K compact cooler. For verifying the validity of the system,...
Since the first 3b/cell (X3) NAND flash memory paper in ISSCC 2008 [1], market demand for applications using high-density low-cost flash memory such as tablets, smart phones, and SSDs, has increased rapidly. Various electronic devices already use X3 NAND. The use of all BL (ABL) architecture, advanced circuitry, and enhanced algorithms enables this work to achieve 18MB/s performance, allowing penetration...
We fabricated AlGaAs/GaAs heterostructure-based quantum Hall devices for the resistance standard at Center for Measurement Standards (CMS). The measurements using a Direct Current Comparator (DCC) show the consistency between the plateaus of v=2 and 4 at the temperature T=2 K, where v is the filling factor. On the other hand, the plateaus of higher filling factors may be susceptible to the reduced...
To elucidate the unique correlations between the electrical and optical characteristics of InGaN/GaN MQW LEDs, it is necessary to examine the radiative recombinations of carriers confined from aspects of the phonon trainsitions.
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