Lock-in Amplifier

The lock-in amplifier is a device used for weak signal detection. Weak signals are often submerged in various noises. The lock-in amplifier can extract the weak signal from the noise and measure it accurately.
The lock-in amplifier is a weak signal detection method based on the mutual coherence method. Its key technique is phase-sensitive detection(PSD). The reference signal with the same frequency and fixed phase relationship as the signal to be tested is used as a reference to filter out the noise different from its frequency, thereby extracting produce useful signal components.

Application Area

Scanning microscope:                AFM、STM、SPM

Materials science:                      Carrier mobility, Carrier density, Hall effect, Ultrasonic materials  

Transport measurement:            Conductivity measurement, Impedance measurement

Noise represents:                       Noise density, Cross-correlation measurement

Optical experiment:                    Spectral analysis, Spectral measurement, THz measurement, TDLAS 

Sensor measuring:                     Gyroscope, Photoelectric sensor, Resonator, Accelerometer

Magnetic Sensor:                       SQUIDs, NV color center, Atomic Magnetometer, VSM

Biomedical:                                Microfluidic

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