Analysis of the Influence of the Sensor's Non-linearity to the Lock-in Amplifier
Ping Zhang · Automation and Instrumentation · 2005
The lock-in amplifier is mainly used in the detection of very weak signals.The non-linearity of sensing part not only generates the error of measurement,but also gives the way to the noise into the amplifier,degrading the characters of the lock in amplifier,detaining the heightening of the amplifier's sensitivity.A simple device of measuring the translucency is used to testify the phenomena's existence,and has been proved theoretically.Its accompanying character is pointed out,and the noise may be diminished very difficultly.