一种智能检测系统电路设计

简述了一种智能检测系统电路的设计，具体分析其中超高部分、轨距部分电路、里程部分测量电路、温度部分测量电路的设计，中央处理与A／D转换电路，电源变换电路。     

基于Smith圆图的射频功放电路的设计与分析

基于Smith圆图设计射频匹配电路，提出了大功率射频放大电路的设计方法，采用MRF9060芯片，运用如Pspice和ADS等开发软件，实现了包括直流偏置电路、保护电路、匹配滤波电路以及射频放大电路在内的整体设计，并给出了对系统增益、回波损耗等指标的仿真结果。     

RC电路的应用

RC电路在模拟电路、脉冲数字电路中得到广泛的应用，由于电路的形式以及信号源和R，C元件参数的不同，因而组成了RC电路的各种应用形式：微分电路、积分电路、耦合电路、滤波电路及脉冲分压器。     

一种新颖的电压模式通用二阶CCII滤波器设计

提出了一种基于电流传送器的电压模式通用二阶滤波器电路。该电路由三个电流传送器（CCII＋／-）、两个电容、三个电阻构成，它能实现二阶低通、带通、高通、陷波、全通滤波函数。分析了该电路的电压传输函数及电路参数，并用PSPICE对该电路进行了仿真，仿真结果表明，该电路设计正确，电路结构简单，所用元器件少。     

自触发撬棒电路

介绍了雷达发射机中撬棒电路的作用和实现方法，以及撬棒电路的种类和不同的工作方式。在实验的基础上分析了各种撬棒保护电路的工作原理，对比了不同工作方式下的撬棒电路的优缺点，提出了一种新型自触发撬棒电路，该电路具有简单、可靠、延时时间短、体积功耗小等优点，可减少发射管的灌入能量，从而保护发射管。     

集成电路抗腐蚀能力的研究

首先介绍了塑封电路、玻璃封装电路和陶封电路的构成材料，然后分别选取这3种电路的若干只样品，按几种试验条件进行了盐雾试验，针对试验后在电路上出现的腐蚀现象进行了理论分析，最后总结了3种电路各自的抗腐蚀能力。     

一种实时检测芯片内部温度的电路实现

传统的基于Verster原理检测芯片内部温度的电路有着误差较大、结构相对复杂的缺点。在传统电路基础上提出了一种采用电流镜法的实现电路，此种电路能够避免由于温度对器件的影响而造成的误差，且电路结构简单。对此电路及性能指标进行了模拟仿真，结果表明了此电路灵敏度高、误差小。     

32位高速动态CMOS超前进位加法器的研究

针对TSPC、NSTSPC、ANT等动态电路所存在的缺点，本文介绍了一种新型的动态电路结构-DPANL，即双通路N逻辑动态电路。本文首先对TSPC、NSTSPC和ANT三种电路存在的缺点进行了分析，然后重点分析了DPANL动态电路的工作原理及其优势。并采用DPANL和ANT两种动态电路实现了32位超前进位结构的加法器，Nanosim的仿真结果表明，采用DPANL电路实现的加法器具有速度快、功耗小的特点。     

专用可编程语音编码电路的设计与实现

在人工电子耳蜗系统中，专用可编程语音编码电路实现将语音特征信息包容错编码为传输脉冲，并按要求的传输格式发送编码脉冲。电路独立的指令系统保证了电路能够灵活实现系统所需的各种数据传送格式。电路的容错编码能力保证了传输数据有较强的抗干扰能力。本文介绍了该电路的功能、电路的指令集设计、电路结构和逻辑设计方法以及电路的版图设计过程，并讨论了电路芯片的测试结果。电路版图面积为４．５ｍｍ×４．５ｍｍ，包含１０００个等效门及４３个引脚。     

砷化镓单电源电路研究

本文对BFL单元电路进行了改进，首次提出一种新型的GaAs单电源单元电路，并研究了该单元电路与SiTTL电路的接口电路，实验结果表明该单元电路的设计是可行的，适合于制作中、小规模集成电路．     

50W高功率因数反激式开关电源箝位电路的研究

由于高PF(功率因数)宽电压反激式开关电源的变压器漏感会导致过压尖峰很高,需采用箝位电路吸收.目前常用的三种箝位电路有TD箝位(齐纳箝位)、RCD箝位、TRCD箝位电路,论文分别设计了三种50 W单级PFC的箝位电路.对三种箝位电路的箝位电压波形、EMI、温升和效率进行了测试,测试表明它们的温升、EMI依次降低;RCD和TRCD箝位的电源效率大于TD箝位的.     

Low Power and High Speed Multi Threshold Voltage Interface Circuits

Employing multiple supply voltages (multi- V_DD) is an effective technique for reducing the power consumption without sacrificing speed in an integrated circuit (IC). In order to transfer signals among the circuits operating at different voltage levels specialized voltage interface circuits are required. Two novel multi-threshold voltage (multi-V_th) level converters are proposed in this paper. The new multi-V_th level converters are compared with the previously published circuits for operation at different supply voltages. When the circuits are individually optimized for minimum power consumption, the proposed level converters offer significant power savings of up to 70% as compared to the previously published circuits. Alternatively, when the circuits are individually optimized for minimum propagation delay, the speed is enhanced by up to 78% with the proposed voltage interface circuits in a 0.18- mum TSMC CMOS technology.     

Ultra Low-Voltage Floating-Gate (FGUVMOS) Amplifiers

This paper presents an approach to programming threshold voltages in floating-gate CMOS circuits. The threshold voltage programming is exploited in ultra low-voltage (ULV) amplifier design. A threshold voltage programming scheme is presented and several examples of analog ULV circuits are described. The ULV circuits are used in ULV amplifier design. Measured data are provided.     

Design of voltage-mode and current-mode computational circuits using floating-gate MOS transistors

In this paper, we present voltage-mode and current-mode computational circuits using floating-gate MOS (FGMOS) transistors, operating in saturation region. The circuits are designed using two FGMOS basic-cells, each one formed by three floating-gate transistors with common source. The first basic cell is connected in voltage mode, while the second one is connected in current-mode configuration in order to implement voltage and current-mode circuits, respectively. Using the basic FGMOS cells, voltage and current squarers, four-quadrant multipliers and a current square rooter are designed. Mismatches and distortion analysis for the proposed circuits have been elaborated. The most important advantages are, rail-to-rail dynamic input range, low distortion and ability for either differential or single-ended input signals. Simulation results demonstrate the feasibility and the accuracy of the circuits.     

电路理论在电气工程中的若干应用

电路理论的发展,充分体现了理论来源于实践,又反过来指导实践的过程.在教学过程中,加强实际应用方面的举例,会使教学过程更加生动.本文通过给出动态电路、非正弦电路、谐振电路和三相电路等电路理论,在整流滤波、电容器交流耐压实验和高压柜中互感器特殊连接等电气工程中的若干应用,为电路理论教学提供一些工程应用方面的例子.     

Power integrated circuits: problems, tradeoffs, and solutions

Current, voltage, and power tradeoffs are presented together with circuits for protection in the case of short circuit, overvoltage, supply voltage reversal, and inductive load transients. The future developments in power integrated circuits are discussed.     

Very low-voltage class AB CMOS and bipolar precision currentrectifiers

Simple class-AB CMOS and bipolar precision rectifier circuits that operate from a single supply close to a transistor's threshold voltage are introduced. These circuits have output voltage swings comparable to the supply voltage. Results from simulations of MOS and bipolar precision rectifiers at 20 and 100 MHz, respectively, are presented. Experimental results of a test chip are presented that verify the proposed circuits. A full wave precision rectifier based on the proposed rectifier cells is discussed     

直流数控可调稳压电源的设计

采用AT89C51单片机作为数控模块核心,以通过按键调节可输出0-18V连续可调电压．电压调节分粗调与细调,粗调步进电压为1V,细调步进电压为0．05V,液晶屏显示输出电压。稳压输出电路舍过流检测电路．通过中断实现软件过流保护和报警。测试结果表明,该电源满足设计要求,可用于实验教学和工程应用中。     

高速低压低功耗BiCMOS逻辑电路及工艺技术

介绍了几种高开关速度、低电源电压等级，低功耗的BiCMOS逻辑门电路，并分析了它们的工作原理及其工艺技术情况。结果表明，这些电路的电源电压可达到2．0V以下，而且信号传输延迟较小，有的还实现了全摆幅输出，因而它们可用于便携式电子设备和其它VLSI和ULSI新品等场合。     

Evaluation of delay-time degradation of low-voltage BiCMOS based ona novel analytical delay-time modeling

The degradation of delay time of totem-pole BiCMOS, CBiCMOS, and BiNMOS circuits by supply voltage reduction is evaluated by a novel delay-time model. It has been found that base-collector capacitance plays a greater role in determining the delay time than other parasitic capacitances in BiCMOS circuits. It is concluded that when the input signal swings fully from zero to the supply voltage, the minimum supply voltage to guarantee high-speed operation over CMOS circuits is almost the same for the three kinds of BiCMOS circuits. When the input swing is reduced by the base-emitter voltage, however, BiNMOS and CBiCMOS circuits can operate on a lower supply voltage than totem-pole BiCMOS circuits