基于Verilog-A语言的霍尔元件仿真模型的建立

西安科技大学 电气与控制工程学院,陕西 西安 710054

霍尔元件; 集成电路; Verilog-A语言; 仿真模型

Establishment of hall-element simulationmodel based on Verilog-A language
WU Feng-juan,LIU Shu-lin,YANG Bo

(College of Electrical and Control Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

hall element; integrated circuit; Verilog-A language; simulation model

DOI: 10.13800/j.cnki.xakjdxxb.2018.0124

备注

在霍尔集成电路及霍尔传感器设计中,霍尔元件模型的建立直接决定该设计的精度。通过对霍尔元件的深入分析,与传统的四电阻惠斯通电桥模型、基本单元数量可缩比的精确仿真模型、等效集总电阻模型等相关霍尔元件模型进行比较,提出了一种精确改进的仿真模型。该仿真模型由8个电阻、4个反偏二极管、4个电流控制电压源和4个JFET组成。其中,八电阻网络可以更好地反映电流流动,4个反偏二极管用于表示霍尔元件的寄生效应,4个电流控制电压源用来模拟磁场和霍尔电压的关系,4个JFET可以有效提高霍尔元件的交流特性。该模型充分考虑了各种物理效应及寄生效应的影响,采用硬件描述语言Verilog-A实现,非常适合在Cadence Spectre环境下对霍尔元件及整个霍尔集成电路进行仿真分析。实验结果表明:该模型仿真精度高、结构简单、易于实现。

In the Hall integrated circuit and Hall sensor design,the Hall element model directly determines the accuracy of the design.Through in-depth analysis of the Hall element,and compared with the traditional four-resistance wheatstone bridge model,the exact simulation model of the reducednumber of basic units,the equivalent lumped-resistance model and other relevant hall component models,a precise and improved simulation model is put forward.The simulation model consists of eight resistors,four reverse-biased diodes,four current-controlled voltage sources and four JFETs.Among them,eight resistance networks can better reflect current flow,four anti-bias diodes are used to represent the parasitic effects of hall elements,four current control voltage sources are used to simulate the relationship between magnetic field and hall voltage,and four JFETs can effectively improve the AC characteristics of hall elements.Taking full account of the effects of various physical and parasitic effects,it has been written in hardware description language Verilog-A and is very suitable for the simulation analysis of the Hall element and the entire Hall integrated circuit in the cadence spectre environment.The experimental results show that the model has high precision,simple structure and easy implementation.