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求助~~新人小白,电流源如何设计?

老板要求做一个电流源,要求输出阻抗越大越好,输出电流在几十mA,正弦波,请问各位大神,我可以从哪些方面进行资料的寻找或者有哪些合适的芯片?

在论坛上看到的关于电流源的帖子,www.deyisupport.com/.../72044.aspx,好像都是用于直流的?还是可以用于交流,只是我不会?

还望各位帮帮忙,谢谢~~