In the third chapter , a methodologies to realize second - order band - pass filter with which center frequency tuned in a wide range using mcdi ( multiple output current - mode differential integrator ) , these two kinds of mcdi are composed of pmos and nmos input transistors respectively , lastly we compare these two integrators " merits and disadvantages 第三章：提出了输入级分别为pmos管、 nmos管的多输出端电流模式全差分积分器，并由此构成了中心频率连续可调的二阶带通滤波器，同时比较了二者的优缺点。
First , the operational principle of the boost converter which includes continuous mode and discontinuous mode was analyzed as well as the basic theory about current mode and the circuit modulation which includes pulse width modulation ( pwm ) and pulse frequency modulation ( pfm ) 首先分析boost电路的两种工作模式,即连续电流模式和不连续电流模式,然后分析了目前应用比较广泛的电流反馈控制模式,最后对频率宽度调制( pwm )模式和频率脉冲调制( pfm )模式进行了对比分析。
At light loads , the architecture allows the chip to “ skip ” cycles to reduce power dissipation . in the circuit design , the basic principle and small signal model of the boost power stage are given at first , and then the stability and small signal model of the control loop are also analyzed , finally , the whole chip architecture and sub - block parameters are presented according to the application requirements 在电路设计中,首先阐述了升压型直流转换器的功率输出级的拓扑结构、基本原理、小信号模型,然后分析了电流模式控制回路的稳定性及小信号模型,最后根据应用要求进行了电路的总体架构设计,完成了每个子电路的各种参数的分析、计算。
Due to its characteristics of fast response , good stability , inherent current limiting , current - mode controller has been widely applied in power management circuits . the pwm current - mode dc / dc converter is firstly studied in this dissertation , after that , a high efficiency ; current regulating boost dc / dc converter for led driving is designed 本论文在研究了脉宽调制方式的电流模式dc / dc变换器的实现技术的前提下,设计了一款高效率、输出电流可调的升压型dc / dc变换器控制ic ,应用于白光led驱动。
With promulgation and obliging actualization of iec 1000 - 3 - 2 etc . international standards , power factor correction ( pfc ) technique become a hotspot of research in power electronics field . based on average current mode , the paper introduce the design and implementation of a fully digital controlled single - phase boost power factor corrector with fast response . the control - loop circuit is realized using digital control and the corrector can tend to unity power factor , lower current harmonics and high transfer efficiency 本文在平均电流模式控制的有源功率因数校正技术的基础上，设计了一种控制电路基于数字信号处理器( dsp ) 、主电路采用boost变换器拓扑结构的全数字单相功率因数校正器，用数字电路代替传统的模拟电路来实现对整个回路的控制，最终使得校正器具有输入功率因数接近于1 、低电流谐波以及高转换效率的特性。
Based on the analysis and comparison of the peak current - injection mode and average current mode control strategies , the method of designing average current control mode pi regulator is obtained . the digital simulation of the converter has been done with the help of matlab software . the good transient and stable character of the converter is attained while rated load 在分析与比较峰值电流模式与平均值电流模式控制策略的基础上，给出平均值电流模式pi调节器的设计方法，利用matlab软件对变换器进行了数字仿真，证实了变换器在额定功率范围内动、静态特性良好；过载情况下变换器具有自动限流、保护主功率器件的特性。
Next , the global system architecture is presented upon the design requirements . due to the fact that constant current is required for driving led , as a result , different from conventional current - mode converter with both output voltage and inductor current feedback loop , the proposed converter adopt dual current feedback loop that both inductor current and output current are detected to provide a stable output current for led 在整体结构设计中,与典型的电流模式采用电感电流反馈环路和输出电压反馈环路不同,本文针对驱动led需要电流稳定的特点,采用双电流反馈环路,即电感电流环路和负载led电流环路,这样就能对负载led电流做出快速响应,通过反馈环路达到稳定led电流的目的。
Continuous - time analog filter is the only method when processing high frequency signal ( usually above 1mhz ) in low power consumption . it has been widely used in the area of communication , electronic measurement , instruments , autocontrol , etc . it ’ s especially used in digital and analog mixed signal processing and communication integrated circuit . current - mode filter becomes the new research direction in the world , as it ’ s high speed , low power consumption and simple configuration 提出了基于ota的多功能电流模式双二阶滤波器,基于ota的八阶切比雪夫滤波器,用模拟lc梯形电路法设计椭圆低通滤波器时,在传统的状态变量选取方法的基础上,用改进后的状态变量选取方法得到了( k + 1 )阶椭圆函数低通滤波器的简化信号流图,实现了简化的基于ota的椭圆低通滤波器电路。
Since low voltnge , low power cmos analogy circuit and current - mode analogy integrated circuit have so many advaotages , it has become most appealing for vlsi t6chnique theorotical scholar and design engineel filter is an important unit of analog integrated circuit , whose structue construction and design method can estend to the design of large scale " ana1og integrated circuit . 低电压、低功率cmos模拟电路与电流模式集成电路由于具有诸多的优点而成为当前vlsi技术理论工作者和设计工程师所关注的热点。模拟滤波器作为模拟集成电路的重要单元，其结构生成方法和电路设计方法可推广至大规模集成电路设计，具有重要的参考价值和实际应用价值。
This paper systematically presents the importance of the research of low - voltage and low - power analogue integrated circuit design , and it introduces the development of current - mode device - current conveyor ( cc ) and synthesizes its applications in the fields of active network and signal process 本文系统地阐述了低电压、低功耗模拟集成电路设计研究的必要性和重要性；介绍了电流模式器件? ?电流传送器的发展和当前在国内外的研究状况，综述了电流模式器件的优点和它在有源网络和信号处理方面的应用。
