电子线路基础由于虚断: duC(t)iR?ic?C?dt集成运放的反相输入端为虚地，有uC(t)?ui(t)可得u??iR??iRduCdui??RC???RC?dtdt输出电压与输入电压对时间的微分成正比。如果输入信号为正弦波:ui?Umsin?t输出电压为oRcduiuo??RC???UmRC???cos?t2015/12/1621dthongfeng@nuaa.edu.cn电子线路基础Dz1Dz2uiR1CRuoC'R'22
hongfeng@nuaa.edu.cn
2015/12/16
电子线路基础4.1.4 对数和反对数运算电路1.对数运算电路iCTiRNPuo23
hongfeng@nuaa.edu.cn
2015/12/16
电子线路基础由虚地：半导体三极管的iC~uBE关系为：uiiC?iR?RuO??uBEuBEUTiC?iE?IES?e可得:??1?IES?e?uBEUT得:?iC??uBE?UT?ln??I??ES??iC??ui????UT?ln??uO??uBE??UT?ln??I??R?I?ES??ES??2015/12/16??UT?ln?ui?24?UT?ln?R?IES?hongfeng@nuaa.edu.cn