CAJ | 학술논문

利用LabVIEW软件和PCI‐6251采集卡设计了虚拟锁相放大器。通过对图形化锁相放大器的相敏检波特性，奇偶谐波的抑制能力以及频率响应，白噪声抑制等进行了测量，发现其具有与仪器化锁相放大器同等甚至更好的抑制噪声的能力。
이용LabVIEW연건화PCI‐6251채집잡설계료허의쇄상방대기。통과대도형화쇄상방대기적상민검파특성，기우해파적억제능력이급빈솔향응，백조성억제등진행료측량，발현기구유여의기화쇄상방대기동등심지경호적억제조성적능력。
A virtual lock‐in amplifier was designed based on NI LabVIEW software platform and PCI‐6251 acquisition card .A series of measurements like phase sensitive detection ,noise suppression by even and odd harmonics and frequency response had been done with a good accuracy .The measure‐ment results demonstrated that this virtual lock‐in amplifier had a good and even better performance of noise suppression compared with normal instrumental lock‐in amplifier .