摘要
传统的基于Matlab/Simulink的高速高精度流水线ADC模型对电路设计具有指导作用,但是与实际电路存在一定的差距。为了提高模型的准确性,通过分析折叠式增益增强型运放的特点,建立基于SMIC 0.18μm混合CMOS工艺的运放传输函数和相对符合实际的数学模型。将运放建模分析结果与采用同一工艺设计的实际电路仿真结果进行对比,验证了模型的有效性。在考虑实际电路中各种非理性因素的情况下,建立14位100MHz流水线ADC模型,给出了理想情况下与添加非理想因素后流水线ADC模型的输出指标,对实际电路的设计具有指导意义。
Conventional model of high speed and high resolution pipelined ADC based on Matlab/Simulink is beneficial to actual circuit design. However, there are some differences between the model and the actual circuit. In order to improve accuracy of the model, characteristics of gain boost folding operational amplifier was analyzed, and its transfer function and relatively accurate mathematical model were established based on SMIC＇ s 0.18 μm mixed- signal CMOS process. Modeling results were compared with actual circuit simulation using the same process to verify the effectiveness of the model. With non-idealities of actual circuit taken into consideration, a behavioral model of 14-bit 100 MHz pipelined ADC was built, and simulated performances of the ADC in both ideal and non- ideal situations were provided.
出处
《微电子学》
CAS
CSCD
北大核心
2013年第5期686-689,共4页
Microelectronics
基金
国家自然科学基金资助项目(61001052)
北京市自然科学基金资助项目(4123096)
