如上图中输出OUTA进入个AD8231的另一个OP AMP中。这样的链接是有什么作用？其中有关电容电阻的链接又有什么相关联系？
里面有提到基本的工作原理是：
The operation can be described qualitatively:
• At low frequencies, where C1 and C2 appear as open circuits, the signal is simply buffered to the output.
• At high frequencies, where C1 and C2 appear as short circuits, the signal is shunted to ground at the amplifier’s input, the amplifier amplifies this input to its output, and the signal does not appear at Vo.
• Near the cut-off frequency, where the impedance of C1 and C2 is on the same order as R1 and R2, positive feedback through C2 provides Q enhancement of the signal.
