Common mode rejection ratio : 120 db , serial mode rejection ratio : 60 db 共模拟制比: 120db ,串模拟制比: 60db
Cmrr common mode rejection ratio 共模抑制比
Cmrr common mode rejection ratio 共态抑制比
Common mode rejection ratio 共模抑制比
Owing to weak output signals integrated amplifier is designed , which is characteristics of shorter wires , higher input impedance , higher common mode rejection ratio and series mode rejection ratio , smaller zero shift and temperature shift 由于输出信号微弱,采用短线路传输,高输入阻抗,共模抑制比和串模抑制比高,温漂和零漂小的集成运放电路。
By designing the circuit structure of preamplifier and selecting new elements such as ultra low noise operational amplifier and linear opto - coupler , some difficulties in eeg acquisition is overcome and the common mode rejection ratio ( cmrr ) of preamplifier is highly increased . so eeg can be amplified and detected well 通过对前置放大器等电路结构的精心设计,选用超低噪声的集成运算放大器以及线性光耦合器等新器件,克服了脑电信号采集中经常遇到的一些困难,使前置放大器具有较高的共模抑制比,从而能够较好地放大检测出所需的脑电信号。