及电路

A combinational circuit that has three inputs that are an augend, D, an addend, E, and carry digit transferred from another digit place, F, and two outputs that are a sum without carry, T, and a new carry digit, R, and in which the outputs are related to the inputs according to the following table.

一种组合电路，有三个输入端和两个输出端；三个输入端是：被加数d、加数e以及从另一个数位传来的进位数f；两个输出端是：无进位和数t及新的进位数r。电路的输出和输入的关系如下表所示

A method of a voice annunciator system is introduced in this paper. To solve the problems existing in the traditional industry annunciator, with AT89C52 microcontroller as the main control unit, the voice annunciator system is designed by ISD4003-4 which is made of ISD company in America. Furthermore, the hardware circuit design and software programs are discussed in detail.

介绍了一种语音报警系统的设计方法，该语音报警系统针对传统工业报警器中存在的问题，以AT89C52单片机为主控单元，采用了美国ISD公司的ISD4000系列语音芯片ISD4003-4设计了该系统的语音录放电路，对硬件电路的设计及软件的编程作了较为详细的阐述。

This design main content is as the core designs an atomizer take AT89C2051 the control circuit and the atomization has the electric circuit.

本设计主要内容是以AT89C2051为核心设计出一个雾化器的控制电路及雾化发生电路。

There are three parts in this system such as high-power RF Auto-follow circuit, radio tube RF high-handed monofier, and monitor and show circuit.

该系统主要包括大功率射频激励电路、电子管射频高压振荡电路及监控与显示电路3部分。

This design uses AT89C51 SCM chip controls the charging process, achieving A/D convert and show circuit. The battery voltage information can be detected by the external circuit to choose the correct charge mode, realizing the intelligent conversion mode of the trickle charge, the constant current charging, the constant voltage charging and the float charge.

采用AT89C51单片机芯片作为充电过程的控制芯片进行电路设计，实现A/D转换和显示电路，并根据外部电路检测到的电池电压信息选择正确的充电模式，实现在涓流、恒流、恒压及浮充电模式之间的智能转换。

This paper presented the main functions and characteristics of Multisim8.0, and the main qualities of high frequency tunable amplifier such as voltage gain, transmission bands and selectivity were studied using simulation analysis and testing technologies of Multisim 8.0. The results are visual and precise, and prove the theory very well. This software has powerful simulation and analysis function, by which the analysis and design of high frequency circuit are not only more precise and credible, but also more closed to the real circuit running status.

本文介绍了Multisim8.0仿真软件的主要功能及特点，并结合该软件对高频单调谐放大电路的电压增益、通频带、选择性等主要质量指标进行了测试与仿真分析，结果直观、精确，很好地验证了理论，表明该软件有强大的仿真和分析功能，在实现高频电路分析和设计方面不仅高效、可靠，而且具有逼近真实电路的效果。

This system was composed of a temperature controlled tank, switch measurement circuit, temperature control circuit, interface circuit, an industrial manipulative computer, and so on.

本文介绍了温度继电器自动测试系统的设计，此系统由温控箱、开关量检测电路、温度控制电路、接口电路及工控机等硬件组成。

Specialized introduction: This specialized raise has the electronic technology and the information system elementary knowledge, can be engaged in each kind of electronic installation and the information system research, the design, the manufacture, the application and the development higher project technology talented person Main curriculum: The signal and the system, the digital signal processing, the correspondence principle, the microcomputer principle and the connection technology, the monolithic integrated circuit principle and the application technology, the DSP technology and the application, the EDA technology, the construction of data, embedded Linux using the programming, the feeling measure technical, the electric circuit theory series curriculum, the computer technology series curriculum and so on individual hobby * software and hardware research and development computer correspondence literature ping pong photography The experience and the personal experience * 2006.6.29-7.8 compile the staff management system management system using the C language, its basic service activity includes: The staff information warehousing, the revision, the inquiry, the insertion, deletes the staff information and so on * 2006.7.10-7.20 monolithic integrated circuit curriculum design period completes the stopwatch the design, namely the initialization timer is 99:99, 0 starts using the monolithic integrated circuit timer fixed time, fixed time arrives when 0s to transmit the signal to cause the buzzer bell, and may realize suspends, the continuation and the replacement function * 2007.7.2- 7.8 practises in Luoyang Big dragon Peony Communication facility Limited company, does has liquid crystal display monitor telephone one, simultaneously visited has served under somebody's banner the correspondence company, and studied has simulated the telephone the design electric circuit, had understood its basic principle * 2007.7.4- 7.18 completed the DSP curriculum in the school to design, realizes the FIR numeral filter, namely transmitted 25 from DSPThe height level, after advocates AC01 D/A to transform the simulation square-wave, then passes to again from AC01 carries on A/D to transform, produces the data signal, after the DSP numeral filter, finally produces the sine wave * 2008.8.1-8.15 to practise in the Zhejiang Jiang hua abundant power tool limited company, studies the computer software and hardware maintenance.

专业介绍：本专业培养具备电子技术和信息系统的基础知识，能从事各类电子设备和信息系统的研究、设计、制造、应用和开发的高等工程技术人才主要课程：信号与系统、数字信号处理、通信原理、微机原理与接口技术、单片机原理与应用技术、DSP技术及应用、EDA技术、数据结构、嵌入式Linux应用编程、感测技术、电路理论系列课程、计算机技术系列课程等个人爱好＊软硬件研发计算机通信文学乒乓球摄影实践经验及个人经历＊ 2006.6.29-7.8 利用C语言编写员工管理系统，其基本业务活动包括：员工信息入库，修改、查询、插入、删除员工信息等＊ 2006.7.10-7.20 单片机课程设计期间完成秒表的设计，即初始化定时器为99：99，利用单片机定时器0开始定时，定时到0s时发送信号使蜂鸣器响铃，并可实现暂停、继续和复位功能＊ 2007.7.2- 7.8 在洛阳巨龙牡丹通信设备有限公司实习，做有液晶显示屏电话机一部，同时参观了旗下通信公司，并学习了模拟电话的设计电路，懂得了其基本原理＊ 2007.7.4- 7.18 在校完成DSP课程设计，实现FIR数字滤波，即从DSP发送25个高低电平，经主AC01 D/A 转换成模拟方波，然后再传给从AC01进行A/D转换，生成数据信号，经DSP数字滤波，最后生成正弦波＊ 2008.8.1-8.15 在浙江华丰电动工具有限公司实习，学习电脑软硬件维护。

Secondly, this work introduces the basic operating principle of mixer and several types of structures as well. Theoretical analysis of impact on performance (linearity, conversion gain, side band suppression etc.) posed by design parameters is given.

其次，介绍了混频器的工作原理及常见的电路结构，针对上混频器的电路特点，从理论上分析了电路中各部分对其性能指标（线性度、转换增益、边带抑制等）的影响，并通过图表较为直观的反映了性能指标和设计参数的关系。

3 A fuseholder or circuit breaker provided as a part of an appliance shall be acceptable for the particular application and shall not be accessible from the outside of the appliance without opening a door or cover, except that the operating handle of a circuit breaker may project outside of the enclosure. A fuseholder shall be so installed that no uninsulated live parts other than the screw shell or clips of the fuseholder are exposed to contact by a person removing or replacing a fuse.

18.3保险盒或电路断路器作为电器的一个零件可被特殊电器所接受，并在电器上的门或盖未打开的情况下，除了电路断路器的操作手柄伸出了外壳，都不能接触到保险盒或电路断路器，保险盒装好，若更换或取走保险时，除了螺钉盖及保险夹可同人体接触之外，不能有其它的导电活动件裸露同人体接触。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。