A Method of Generating Correlation Signals in Weak Signal Detection
Jian Xing-liang · Machinery & Electronics · 2007
To provide correlation signal sources for the lock-in amplifier in weak signal detection,correlation sine signals,3 ways 6 phases,are direct frequency synthesized by using microcontroller AT89C51.In this microcontroller program,just using one long sine data table can satisfy the correlation requirement between all output signals.The method how can produce the data table with any bytes is presented by using Matlab in this paper.