This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

OPA335测温电路

Other Parts Discussed in Thread: OPA335

这是手册上给出的OPA335构成的电桥电路,我现在想用这个电路进行测温(其中一个电阻换成PT100铂热电阻),但是我搞不清以下问题:

1.这个OPA335作用是什么?有必要加这个运放吗?

2.测温时热电阻阻值会发生变化,那么运放的闭环放大倍数不久改变了么?

3.R和R1该怎么选取大小?