Research on Zero Dirft&Suppression of High-temperature Piezoelectric Sensor Based on Langasite
CHENG Wenhua
ZHANG Lei
TAN Qiulin
Abstract：The electrical mechanism of DC drift of langasite piezoelectric sensor during high temperature testing is analyzed in this work.The interactions among sensors,operational amplifier misalignments,passive components and electrical connections in the test environment are discussed.By establishing a simplified test loop model,the influence of chip devices and environmental fac-tors on output DC bias is deduced.The zero-drift suppression method is summarized according to the comprehensive influence ex-pression in the worst case,and the charge amplifier used for the high temperature test is optimized.After optimization,the test drift baseline at 800℃can be controlled to about 50％of the op amp supply rail,contributing>89.5％of the suppression effect com-pared with the uncompensated case.
Keywords：high temperaturelangasitedrift compensationcharge amplifier
Publication Date：2025-12-20
Online Publishing Date：2026-03-23(First online date of this platform, not the publication date of the document)
Pages：5( 180-183,193 )