A Design of Intellect Large Dynamic Range Microvolt Meter

The paper presents a method to measure large dynamic range weak signal.Satisfied effects have obtained through practical tests.This method applies gain controlled technique which mainly contains gain controlled components to perform large scale dynamic condensing,and the real—time treatment conducted by 80C31 microcomputer to accomplish real—time display,error self detect and overcharge auto warning.It can be used as not only the high accurate,large dynamic range and digital microvolt meter,but also the multi—channel,large dynamic range and low noisy amplifier.The article mainly introduces the systemic basical principle,the system hardware constructure and principal software producer.