An automatic gain linear micro-current measurement circuit applied in Langmuir probe
Langmuir probe is an important instrument for detecting space plasma, used in sounding rocket project in Meridian as one of payload at present. This article describes the automatic gain linear micro-current measurement circuit used in Langmuir probe, which can linear measure tiny current between 50pA to 500uA in multi-gain range. Its working principle is that firstly the circuit real-time monitors and identifies the output signal, then adjusts automatically the gain to match input current according to the identified results, to achieve the micro-current measurement accurately. The circuit obtains excellent measure data in the lab tests.
component: automatic gain micro-current the langmuir probe
Liu Chao
Chinese Academy of Sciences Center for Space Science and Applied Research Beijing, China
国际会议
太原
英文
385-387
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）