请教运放OPA680

<br />各位大虾,小弟初次接触运放,所以向各位大虾请教此电路的所实现的功能.&nbsp;<br />&nbsp;<br /><br /> 相关链接:<a href='http://bbs.21ic.com/upfiles/img/20071/2007123172723834.pdf'>http://bbs.21ic.com/upfiles/img/20071/2007123172723834.pdf</a>