设计了一个2倍放大的电路,采用的是正负12V的电源供电,当输入为4V时,输出出现了信号截止,波形被削顶。而将电源换为正负15V的电源时,输入+4V放大两倍又能够输出8V的电压。这是为什么?是因为芯片出现饱和了吗
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是的,电源正负15V时的典型输出范围是正负10V,如果希望输出幅度大些,可以使用轨到轨的放大器。
可以看下:
http://www.ti.com.cn/lsds/ti_zh/amplifiers-linear/precision-amplifier-products.page#p78=Out&p1261max=24;45&columnOrderString=o1,o4,p480,p1261min,p1261max,p23typ,p1max,p22typ,p2max,p743typ,p4min,p10max,p233typ,p7typ,p1498,p1192,p2954,p1811,p1130,p78