计并制作一台具有直流电压、交流电压和电阻测量功能的智能数字万用表.-　　This design introduces the design and research for 4 3/4 Digit DMM Circuit integrally and systemically.

he article mainly introduces the performance Characteristic of MAX134, inside structure, digital interface, input and output data, and some main functions. The design of intelligent digital multimeter consists ofhardware circuit and software circuit.