( 2 ) piece - wise linear ( pwl ) circuit realizations of the class - di - a chaos generator are suggested . in the circuit realizations , only one nonlinear element is needed , that is , only a three - segment pwl voltage - controlled vokage source or a two - segment pwl voltage - controlled voltage source is needed . in the context of the whole circuit structure , this circuit realization is more complex than that of chua ' s circuit , but in the context of the complexity of the nonlinear element employed , it is the most simple chaos circuit while realized by a two - segment pwl element ( 2 )对本文所提出的第- a种新的单涡旋混沌模型进行了分段线性电路实验研究,其分段线性电路实现只需一个非线性器件,即一个三段线性电压控制电压源或两段线性电压控制电压源,从整体电路结构来看,它比蔡氏电路要复杂,然而它可以采用两段线性电压控制电压源来实现,因而就非线性器件的复杂程度而言,它是最简单的混沌发生器。
The main works are listed as follows : ( 1 ) the small capacitance measuring circuit for ect based on the charge amplification principle was deeply analyzed and improved . the stray - immunity and the charge injection effect of this circuit were deeply analyzed . the influence of the charge injection effect was eliminated by practical time sequences and circuit structure differential 本文的主要工作和创新点如下: ( 1 )对基于电荷放大原理的微弱电容测量电路进行了深入的分析和改进,深入分析了该电路的抗杂散电容性能及电荷注入效应问题,通过时序的合理设计消除了电荷注入效应等因素对测量结果的影响,改进了该电路的数学模型。
The serializer and deserializer moduls in the ftlvds chip are designed by the way of standard cell design approach . the paper emphatically discusses the tradeoff and the implementation of several clock synchronization modes and circuit structures , and makes a lot of verilog simulation and verification on the circuits designed 串并模块串行化器和解串行器采用标准单元的方法设计,论文讨论了对几种时钟同步模式以及串并转换电路结构的权衡和实现,并对所设计的电路结构进行了verilog模拟验证。
In this thesis , firstly , it puts forward a total design project of the intelligent water meter system which make use of the ic card technique ; then it systematically introduces the composition , the characteristics and the functions of each part on the control system of this intelligent water meter which adopts low power msp430f413 microcontroller as the core , designs the hardware electric circuit structure of the control system and studies the software to control the system . according to the combination of software and hardware , low power , anti _ interferece and the security of the control system are studied and analyzed . in the end , the existing problems of the system and the improvement ideas of software and hardware in further contents and approaches are proposed 论文首先提出利用ic卡技术智能水表系统的总体设计方案;然后系统地介绍了以msp430f413单片机为核心的智能水表控制系统的组成、特点及各部分功能,设计了系统控制的硬件电路结构和研究了软件控制流程的实现,采用软硬件结合的方法,对系统的低功耗、抗干扰性设计及安全性问题作了一定的分析与研究;最后,对系统尚存在的问题及进一步开发和完善的内容和方向进行了探讨。