频谱激电测量仪器关键技术研究及实现  | 
	
| 石加玉, 郭鹏, 李勇 | 
| 
			 Research and implementation of key technologies of spectral induced polarization instruments  | 
	
| SHI Jia-Yu, GUO Peng, LI Yong | 
| 图5 数字同步相关检测原理框图 | 
	
| Fig.5 Principle block diagram of digital synchronous correlation detection | 
	
			 
		 |