针对传统模数转换器(analog to digital convertor,ADC)设计复杂度高、仿真迭代时间长的问题,提出了一种高精度ADC系统设计与建模方法。该方法以10 bit 50 MHz流水线ADC为例,首先选取分离采样架构,进行电路的s域变换理论分析;其次对电...针对传统模数转换器(analog to digital convertor,ADC)设计复杂度高、仿真迭代时间长的问题,提出了一种高精度ADC系统设计与建模方法。该方法以10 bit 50 MHz流水线ADC为例,首先选取分离采样架构,进行电路的s域变换理论分析;其次对电路中各种非理想噪声的表达式进行精确推导,根据系统中的运放功耗指标进行参数优化;最后分别在MATLAB和Cadence软件中建立模型,进行100点蒙特卡洛仿真。仿真结果表明,在TSMC 180 nm工艺失配下,该流水线ADC有效位数达到9.70 bit,无杂散动态范围维持在76 dB附近,微分非线性在0.3 LSB以内,积分非线性在0.5 LSB以内,核心功耗在8 mW,该分析方法在保证流水线ADC优异性能的同时,大幅提高了设计效率。展开更多
Effectiveness evaluation of the joint operation system is an important basis for the demonstration and development of weapon equipment.With the consideration that existing models of system effectiveness evaluation sel...Effectiveness evaluation of the joint operation system is an important basis for the demonstration and development of weapon equipment.With the consideration that existing models of system effectiveness evaluation seldom describe the structural relationship among equipment clearly as well as reflect the dynamic,the analog-to-digital converter-graphical evaluation and review technique(ADC-GERT)network parameter estimation model is proposed based on the ADC model and the joint operation system structure.Firstly,analysis of the joint operation system structure and operation process is conducted to build the GERT network,where equipment subsystems are nodes and activities are directed arches.Then the mission effectiveness of equipment subsystems is calculated by the ADC model.The probability transfer parameters are modified by the mission effectiveness of equipment subsystems based on the Bayesian theorem,with the ADC-GERT network parameter estimation model constructed.Finally,a case study is used to validate the efficiency and dynamic of the ADC-GERT network parameter estimation model.展开更多
文摘针对传统模数转换器(analog to digital convertor,ADC)设计复杂度高、仿真迭代时间长的问题,提出了一种高精度ADC系统设计与建模方法。该方法以10 bit 50 MHz流水线ADC为例,首先选取分离采样架构,进行电路的s域变换理论分析;其次对电路中各种非理想噪声的表达式进行精确推导,根据系统中的运放功耗指标进行参数优化;最后分别在MATLAB和Cadence软件中建立模型,进行100点蒙特卡洛仿真。仿真结果表明,在TSMC 180 nm工艺失配下,该流水线ADC有效位数达到9.70 bit,无杂散动态范围维持在76 dB附近,微分非线性在0.3 LSB以内,积分非线性在0.5 LSB以内,核心功耗在8 mW,该分析方法在保证流水线ADC优异性能的同时,大幅提高了设计效率。
基金supported by the National Natural Science Foundation of China(72071111,71801127,71671091)the NSFC and the UK Royal Society joint project(71811530338)+2 种基金the Special Postdoctoral Fund of China(2019TQ0150)the Fundamental Research Funds for the Central Universities of China(NC2019003)the Intelligence Introduction Base of the Ministry of Science and Technology(G20190010178)。
文摘Effectiveness evaluation of the joint operation system is an important basis for the demonstration and development of weapon equipment.With the consideration that existing models of system effectiveness evaluation seldom describe the structural relationship among equipment clearly as well as reflect the dynamic,the analog-to-digital converter-graphical evaluation and review technique(ADC-GERT)network parameter estimation model is proposed based on the ADC model and the joint operation system structure.Firstly,analysis of the joint operation system structure and operation process is conducted to build the GERT network,where equipment subsystems are nodes and activities are directed arches.Then the mission effectiveness of equipment subsystems is calculated by the ADC model.The probability transfer parameters are modified by the mission effectiveness of equipment subsystems based on the Bayesian theorem,with the ADC-GERT network parameter estimation model constructed.Finally,a case study is used to validate the efficiency and dynamic of the ADC-GERT network parameter estimation model.
