In the scopes of measure, AD conversion is a very important part, the higher bit AD converter always is chosen in order to gain high precision, but it is very expensive for the circuit .

• AD转换是测量中一个非常重要的部分,为了达到精度比较高的转换效果,人们往往选择位数较高的AD转换器,这样容易造成电路的成本过高。