Design of analog signal separation in computerized well logging surface system
Xiaowei Yuan · Electronic Design Engineering · 2011
By analyzing the types of return signals from the downhole instrument and the characteristics of data communications entirely,the analog signal of logging instrument back has low frequency.Then,the analog signal separation unit,which uses voltage-controlled voltage source order low pass filter and voltage follower circuits,can isolate the low-frequency signal effectively.For example,high-frequency interference signal in the magnetic signal has been removed by the analog signal separation unit.It can provide reliable guarantee for the late analog signal acquisition.