摘要
针对目前激光语音恢复电路的精度低、滤波不完全等问题，采用PSD位移传感器设计了一种激光语言还原系统电路。该电路包括基于PSD的光电转换电路、流压变换电路和差分放大电路三部分。通过分析PSD工作原理及特性参数，设计并讨论了流压变换电路及放大电路的性能．实现了微弱信号的低噪声放大。经过实验验证，该电路可在距离障碍物2～3m处清晰地还原出被隔离的室内语音信号。
A voice recovery circuit system based on PSI） sensor is designed in this paper ,contrary to low accuracy and incom- plete filtering of current laser voice recovery circuit. The system includes a photoelectric conversion circuit which is based on PSD, current voltage converting circuit and a differential amplifying circuit. Low noise amplification of weak signals is realized by analyzing operating principle and characteristic parameters of PSD and discussing performance of current voltage converting circuit and a differential amplifying circuit. Experimental results show that the system can clearly restore the speech signal outer 2-3 m away from the obstacle.
出处
《电子技术应用》
北大核心
2014年第1期50-52,共3页
Application of Electronic Technique
基金
国家高技术研究发展计划(863计划)课题项目(2013AA014504)
关键词
激光语音恢复
PSD传感器
流压变化
弱信号放大
laser voice recovery
PSD sensor
current voltage converting
weak signals amplification
