传感技术学报2019，Vol.32Issue(1)：111-116,6.DOI:10.3969/j.issn.1004-1699.2019.01.020
基于2ω0锁定放大结构的硅波导导纳检测电路
Silicon Waveguide Admittance Detecting Circuit Using the Second-Harmonic Frequency Lock-in Architecture
摘要
Abstract
A silicon waveguide admittance detecting circuit was designed with 0.18 μm complementary metal-oxidesemiconductor (CMOS) technology provided by the Taiwan Semiconductor Manufacturing Company (TSMC). The designed circuit can be used to monitor optical power by detecting the change of the silicon waveguide admittance of the photonic device. In the proposed circuit, a second-harmonic frequency lock-in architecture was adopted. The target signal is frequency-synthesized by a switch-mode phase-sensitive detector and amplified by a transimpedance amplifier, and then extracted by a second-order OTA-C band-pass filter at the second-harmonic frequency. Finally, the variation of the silicon waveguide admittance is represented by the variation of the extracted voltage signal.When the target signal is extracted at the second-harmonic frequency, the effect of 1/f noise on the target signal can be reduced, and thus the resolution of the silicon waveguide admittance can be improved. Simulation results show that the resolution of waveguide admittance is 0.8 p S within the operating bandwidth of 80 MHz.关键词
硅波导/导纳检测电路/锁定放大结构/二次谐波频率/1/f噪声Key words
silicon waveguide/admittance detecting circuit/lock-in architecture/second-harmonic frequency/1/f noise分类
信息技术与安全科学引用本文复制引用
李文辉,李仕琪,汪鹏君,陈伟伟..基于2ω0锁定放大结构的硅波导导纳检测电路[J].传感技术学报,2019,32(1):111-116,6.基金项目
国家自然科学基金项目(61875098,61874078,61675108) （61875098,61874078,61675108）
浙江省科技厅公益性技术应用研究计划项目(2013C31083) （2013C31083）
集成光电子学国家重点联合实验室开放课题项目(IOSKL2015KF03) （IOSKL2015KF03）
