TY - Journal of Shandong University(Engineering Science) A1 - Lu WANG,Hong WANG,Guoping CHEN T1 - Weak signal detector based on all-digital phase-shifting lock-in method Y1 - 2019-08-20 JF - Journal of Shandong University(Engineering Science) JO - Journal of Shandong University(Engineering Science) SP - 24 EP - 28 VL - 49 IS - 4 UR - http://gxbwk.njournal.sdu.edu.cn N1 - 10.6040/j.issn.1672-3961.0.2018.526 ER -