宽动态范围瞬变信号调理电路的设计

英文篇名：Wide-range Dynamic Instantaneous Signal Processing Circuit Design
中文刊名：仪表技术与传感器
英文刊名：Instrument Technique and Sensor
作者：龚成龙 ; 马超
英文作者：GONG Cheng-long ; MA Chao (Dept.of Electronic Engineering ; Huaihai Institute of Technology ; Lianyungang 222005 ; China)
中文关键词：宽动态瞬变信号 ; 自动校零 ; 循环放大器 ; 浮点ADC
英文关键词：wide-range dynamic instantaneous signal ; automatic zero adjustment ; cycle amplifier ; floating-point ADC
出版日期：2006-05-30
机构：淮海工学院电子工程系,淮海工学院电子工程系江苏连云港222005,江苏连云港222005
年：2006
期：05
出版单位：仪表技术与传感器

摘要

针对宽动态范围瞬变信号的测量问题,提出一种基于循环放大电路的瞬时浮点放大器,论述了循环放大与自动校零算法、浮点ADC的原理。电路可实现失调误差自动补偿、μV/V范围信号高精度放大、增益快速自适应控制以及浮点模数转换等,其全局和瞬时动态范围分别达到150 dB,90 dB,采样速率达80~130 kS/s,有效精度达25 bit,可满足地震监测及基桩动测等应用系统需要。
By analyzing to the deficiency of existing measure circuit used in wide-range dynamic instantaeous signal processing,an IFP(Instantaneous Floating-point Preamplifier)which based on a cycle amplifier was suggested.The cycle amplifying arithmetic and offset error automatic compensation arithmetic were discussed,and the principle of instantaneous floating-point ADC was introduced in detail.The circuit is offset error self-compensating,it can amplify μV wide-range dynamic signal with high precision,can achieve AGC fleetly and floating-point A/D conversion.The test result shows that the circuit have a full dynamic range of 150 dB and an instantaneous dynamic range of 90 dB,a sampling speed of 80～130 kS/s and an efficacious accuracy of 25 bit.The circuit meet the application requirements such as earthquake monitor and pile foundation dynamic measuring system.

引文

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