Implementation of delta—sigma analog‐to‐digital converter in LTPS process

Abstract— An on‐panel delta—sigma analog‐to‐digital converter (ADC) has been implemented and verified for 3‐μm low‐temperature polysilicon (LTPS) technology with two basic blocks: a delta—sigma modulator and a decimation filter. From the experimental results, the digital output from the delta—sigma modulator is correctly matched with the analog input voltage ratio such that the digital output can be converted into 8‐bit digital code successfully under a supply voltage of 10 V from the decimation filter. The implemented on‐panel delta—sigma ADC can be used for the application of temperature‐to‐digital converter on glass substrate.     

转炉设备新技术和新材料的发展

介绍了顶底复吹转炉设备新技术和新材料的发展.主要包括独特的水冷炉帽技术、免维护的连杆式悬挂系统和高温抗蠕变材料的应用几方面.     

MY RECOLLECTIONS OF G.2 A.6

Abstract

In this article, we consider an attack on the SIGABA cipher under the assumption that the largest practical keyspace is used. The attack highlights various strengths and weaknesses of SIGABA and provides insight into the inherent level of security provided by the cipher.     

ZLM50E变速箱箱体的设计及有限元分析

ZLM50E变速箱用于ZLM50E型装载机上,为装载机提供所需的行进速度。箱体的设计是整个变速箱设计中非常重要的部分,传统设计技术上比较成熟,但存在缺陷。介绍ZLM50E变速箱的结构、受力分析及其载荷的相关计算;对箱体进行三维造型;利用有限元分析发现并改善箱体设计上的缺陷,提出改进设计的方法。     

45t转炉冶炼工艺优化的生产实践

分析了45t转炉冶炼工艺中存在的问题，对炼钢系统的技术热点问题进行了剖析，并提出进一步理顺工艺的措施和建议，使转炉生产过程控制能力和一倒的命中率得以提高，使冶炼终点命中率达到了80％以上。     

Design of Pipelined ADC Using Op Amp Sharing Technique

This paper presents a 10-bit 20 MS/s pipelined Analog-to-Digital Converter(ADC)using op amp sharing approach and removing Sample and Hold Amplifier(SHA)or SHA-less technique to reach the goal of low-power consumption.This design was fabricated in TSMC 0.18 μm 1P6M CMOS technology.Measurement results show at supply voltage of 1.8 V,a SFDR of 42.46 dB,a SNDR of 39.45 dB,an ENOB of 6.26,and a THD of 41.82 dB are at 1 MHz sinusoidal signal input.In addition,the DNL and INL are 1.4 LSB and 3.23 LSB respectively.The power consumption is 28.8 mW.The core area is 0.595 mm2 and the chip area including pads is 1.468 mm2.     

A PAM control method for a matrix converter based on a virtual AC/DC/AC conversion method

In this paper, a novel control method for a matrix converter is proposed. The proposed method is a PAM (Pulse Amplitude Modulation) control method based on a virtual AC/DC/AC conversion method. Output voltage amplitude is controlled by controlling a virtual DC link voltage with a virtual rectifier. Output frequency is controlled by a virtual inverter. First, the proposed method is explained. Next, the validity of the proposed method is confirmed through simulation and experiment using a 750‐W prototype matrix converter. Moreover, various characteristics of the proposed method and conventional virtual AC/DC/AC method are compared through experiment. As a result of the experiment, it has been understood that total harmonic distortion of output current and common‐mode voltage can be reduced compared with the case of using a conventional virtual AC/DC/AC conversion method. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 166(4): 88–96, 2009; Published online in Wiley InterScience ( www.interscience. wiley.com ). DOI 10.1002/eej.20601     

热阻多点温度检测仪表若干设计问题的探讨

本文系统地介绍了热阻式多点温度检测仪表的设计要点和需要注意的问题。可供这类仪表设计者参考。     

逆变器的换流问题研究

换流环节是可控硅变频装置中最重要的电路.换流可靠,变频装置正常运行.如换流失败,则逆变颠复,整个变频系统无法工作.因此说,换流问题是变频技术的中心问题.本文就若干种逆变器的换流环节进行了分析、研究,为合理选择逆变器的换流电路提供一些理论依据和工程实践经验.     

大功率直接变频电路的简化分析

大功率直接变频电路的基本功能是实现频率和电压的直接变换,被应用于航空电源和调速电源中。本文针对由晶闸管组成的九相一单相直接变频电路进行分析,建立了便于工程应用的简化模型,利用该模型在计算机上仿真得出了输出电压频谱以及电路参数对该频谱的影响,为系统的设计提供依据。本文的分析结果可推广并适用于其他同类型直接变频电路。