This paper analyses survey principle of 1532 dielectric log tool,and analyses circuit amplitude detector and phase detector in 1532 dielectric log tool. This paper focuses on dual gate MOSFET and photocoupler for AGC,SCI and FB for noise reduction.

• 文章介绍 15 32型介电测井仪的测量原理 ,并分析了 15 32型介电测井仪的幅度测量系统和相位测量电路 ,以及用于自动增益控制 (AGC)的双栅极场效应管和光耦合器 ,以及用于抑制噪声的穿心电容器和铁氧体磁珠