A CMP end point detector technology was discussed, a sort of foreign motor current-flow detective technology was analyzed. Base on this, a high precision current-flow inspect and C/V conversion circuit was designed. Current-flow inspecting was based on high precision current-flow inspect amplifier LTC1602, and C/V conversion circuits was based on precision, high-side current-sense amplifier MAX472 and ultra-low-power, comparator, operational amplifier MAX591. The improved circuit is succinct and has high de...