请教数字万用表设计

&nbsp;&nbsp;我大四了，和老师商量了一下，想设计一个数字万用表，看了fluke的表，真是佩服，那么优秀的产品。<br />&nbsp;&nbsp;请问各位前辈，哪里有这些国外名表的资料可以参考？我在fluke的网站上下了一个78型的维修手册，上面讲了一些简化电路，挺好的。或者哪里有什么像凯斯利&lt&ltLow&nbsp;level&nbsp;measurement&nbsp;book&gt&gt这样的文档？再活着什么资料可以借鉴？英文汉语都可以。我的基础还算可以，想看一些解决方案性质的东西。小弟先谢了。

要做产品，国内大把廉价数字表都是ASIC方案，IC内该搞定了都搞定了，照着手册抄就是，价钱低得你不能想象

<br /><font color=#008040>沙占友老师的书写得很通俗易懂的.一些电流,电压,电阻的采样测量方法值得借鉴,必竟人家已经产品化了.<br />有用得着的朋友慢慢下吧.(用迅雷捞快)</font><br /><font color=#FF0000></font><br /><font color=#FF0000></font><br /><font color=#FF0000><img src="http://bbs.21ic.com/upfiles/img/20079/2007922142323743.gif"></font><br /><font color=#FF0000></font><br /><font color=#FF0000><img src="http://bbs.21ic.com/upfiles/img/20079/2007922144428261.gif"></font><br /><font color=#FF0000></font><br /><img src="http://bbs.21ic.com/upfiles/img/20079/2007922144527711.gif"><br /><br /><img src="http://bbs.21ic.com/upfiles/img/20079/2007922144555956.gif"><br /><br /><img src="http://bbs.21ic.com/upfiles/img/20079/2007922144617222.gif"><br /><br /><img src="http://bbs.21ic.com/upfiles/img/20079/2007922144649118.gif"><br /><br /><font color=#FF0000></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part01&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922133043484.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922133043484.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part02&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922133343243.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922133343243.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part03&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922133447416.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922133447416.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part04&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/200792213364511.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/200792213364511.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part05&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922134833969.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922134833969.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part06&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922134933371.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922134933371.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part07&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/20079221454847.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/20079221454847.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part08&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/200792214916422.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/200792214916422.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part09&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141131393.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141131393.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part10&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141229153.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141229153.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part11&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141320145.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141320145.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part12&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141423478.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141423478.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part13&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141519444.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141519444.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part14&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141623109.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141623109.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part15&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141723232.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141723232.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part16&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141822311.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141822311.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part17&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922141917321.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922141917321.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part18&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/2007922142035921.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/2007922142035921.rar</a></font><br /><font color=#FF0000>数字万用表电路图集&nbsp;352页&nbsp;5.9M&nbsp;超星版.part19&nbsp;→&nbsp;<a href="http://bbs.21ic.com/upfiles/img/20079/200792214220990.rar" target=_blank>http://bbs.21ic.com/upfiles/img/20079/200792214220990.rar</a></font><br /><font color=#FF0000><font color=#008040><SMALL><BIG><BIG><BIG><BIG><SMALL>下载后更名为01.rar～19.rar后才能解压</SMALL></BIG></BIG></BIG></BIG></SMALL></font></font><br /><font color=#FF0000><font color=#008040><SMALL><BIG><BIG><BIG><BIG><SMALL></SMALL></BIG></BIG></BIG></BIG></SMALL></font></font><br /><br /><SMALL><BIG><BIG><BIG><BIG><SMALL><font color=#FF0080>超星阅读器下载</font></SMALL></BIG></BIG></BIG></BIG></SMALL><br /><font color=#FF0000><font color=#008040><SMALL><BIG><BIG><BIG><BIG><SMALL>&nbsp;&nbsp;<a href="http://bbs.21ic.com/upfiles/img/200710/200710481229114.rar" target=_blank>http://bbs.21ic.com/upfiles/img/200710/200710481229114.rar</a><br />&nbsp;&nbsp;<a href="http://bbs.21ic.com/upfiles/img/200710/200710481316777.rar" target=_blank>http://bbs.21ic.com/upfiles/img/200710/200710481316777.rar</a><br /><br /><font color=#FF0000><font color=#008040><SMALL><BIG><BIG><BIG><BIG><SMALL><SMALL>下载后更名为01.rar～02.rar后才能解压</SMALL></SMALL></BIG></BIG></BIG></BIG></SMALL></font></font></SMALL></BIG></BIG></BIG></BIG></SMALL></font></font><br /><font color=#FF0000><font color=#008040><SMALL><BIG><BIG><BIG><BIG><SMALL></SMALL></BIG></BIG></BIG></BIG></SMALL></font></font><br /><br /><font color=#FF0000></font>&nbsp;

&nbsp;多谢两位前辈指教。特别是tyw前辈，奉献这么多资料。<br />&nbsp;PS:我做的不是毕业设计，只是练着玩。毕设还得下学期。