请教关于差分放大器仿真的问题

煮熟的鸡蛋

好好学习 哈哈

sdmout

If you don't want this feedback, the output CM level maybe set close to the middle of the power rails by introducing a very small DC offset at the differential input.

However this DC offset changes when you sweep the process corners. So the most convenient way is to add a very large feedback resistor (for cmos input differential pair only); or maybe a very large inductor.

过路心客

正解逐步浮出水面

luochunhua

开环仿真就可以了，在输出加一个理想的cmfb

dscd1900

对头，论坛里牛人多

守正出奇

学习到了

qjq100512

开环就是开环，闭环就是闭环，差分为了工作在稳定的阶段，都是结成一个负反馈的闭环，仿开环没有意义