Some sub - block circuits ( error amplifier , soft - start , enable comparator and under - voltage protection circuit ) are designed and several electrical characteristics are simulated using hspice . finally , the whole chip performance is simulated . and the results show the satisfaction to both function targets and characteristics 在子电路设计中,本论文只对其中的误差放大器、软启动电路、使能比较器和欠压保护四个子电路进行了电路原理分析与设计,并在此基础上,运用eda软件hspice对各功能模块的各项指标、参数进行了仿真、分析。
Consequently , an integrate switch mode power supply with high efficiency and good reliability can be realized by the controller with very few external parts . the fundamental principle of monolithic voltage - mode switching regulator is firstly introduced in this thesis , which is followed by a comparison between voltage - mode and current - mode converters where the pros and cons of both converters are discussed in detail ; next , the global system architecture is proposed upon the design requirements and sub - block circuits are also introduced that focuses on several essential sub - blocks such as amp , wave , pwm control , psc , osc and vref . finally , all sub - circuits and the whole chip circuit are simulated by hspice whose results indicate that the circuit function and performance have perfectly satisfied the design requirements 在论文中,首先阐述了电压控制模式pwm开关电源的基本原理,对比了电流控制模式和电压控制模式,分析了各自的优缺点;随后根据设计要求进行了电路的总体设计,完成了各个子电路的原理分析,电路设计和仿真验证,重点阐述了误差放大电路、三角波发生电路、 pwm控制电路、节能控制电路、振荡电路和基准源电路的分析、设计和验证过程;最后,利用eda软件hspice对整体电路进行了功能仿真验证,仿真结果表明,本文完成了设计工作,达到设计要求。
In the charge pump principle section , the principle of linear mode and skip mode are analyzed in detail . the principle of step - up / step - down and the main parameters are also given in there . in sub - block circuit section , the typical circuits including reference , operational amplifier , thermal protection and current limit are introduced 在电荷泵基本理论中,详细分析了线性( linear )模式、跳周期( skipcycles )模式和具有迟滞控制的跳周期模式;同时也介绍了电荷泵的升压/降压工作原理以及主要性能参数及其意义。
In this dissertation , the charging battery ’ s development , principle and various charging termination methods are given firstly , then the circuit architecture is designed according to its function requirements . all the sub - blocks circuits are designed and stimulated by cadence and hspice . the results indicate the fulfillments of all performance merits 再对电路的所有子模块电路进行了详细分析,借助设计软件cadence 、 hspice对子模块电路进行了完整的设计和模拟仿真,给出了合理的电路数据,各子模块电路的电特性参数均达到或优于设计所需指标。