Recall my mechanical example.
Under IDEAL condition (which, however, never can be realized in practice) an opamp with positive feedback would also be stable.
And for small-signal ac simulations the simulator assumes such IDEAL conditions. Remember: Before ac simulations (calculations) start the circuit will always be linearized around the corresponding DC bias point.
EDA上 老外的回复， + - ,,, 按他的意思，仿真 在用IDEAL的OPA时，正反馈也是可以稳定输出的，，，我做了实验，在TINA使用IDEAL果真，正负输入没有区别
|
楼主
