新型数字式电容在线测试仪

A New Type of Digital Capacitance In-Circuit Tester

阐述电容在线测试仪中的 Ｃｘ／ Ｖ转换器的工作原理、电路设计。测试结果表明，被测在线电容Ｃｘ在１００ｐＦ～２０μＦ范围内，该测试仪的整机准确度优于 ２％。

The article introduces the theory of C_x/V circuit and its practical scheme, which is applied in capacitance in - circuit tester. According to test results, the tester has accuracy better than 2% while tested capacitor C_x in a range from 100pF to 20μF.