p*********a
发帖数: 25 | 1 经典的bandgap，如razavi书上所示
想问一下嵌位的op-amp正负输入级能不能调换？ | b*********y
发帖数: 830 | 2 no. as stated in that book. you can calculate the gain from + and - to
output respectively, the latter has to exceed the former for stability
reason. | m**c
发帖数: 168 | 3
yes or not, u have to make neg input > pos input voltage, in order to get
the negative feedback; however, if you want to make it oscillate, you could
switch this two to produce positive feedback.
Just in case, as far as I understand, you mean to get negative feedback,
therefore, you cannot make the switch
【在 p*********a 的大作中提到】
: 经典的bandgap，如razavi书上所示
: 想问一下嵌位的op-amp正负输入级能不能调换？
| s****t
发帖数: 1049 | 4 不能，R3和A1共同构成负反馈，调换之后就变成正反馈了，直接latch了 |
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