Implementation of digital lock-in amplifier based on system generator

Nowadays the weak signal detection technology is necessary in scientific research field, in which the phase-locked amplifying technology is widely used in the field of weak signal detection because it can meet the requirements of high speed and high accuracy. System Generator software is adopted as a tool since System Generator can make the design more conveniently and efficiently. The design of each module in orthogonal vector type digital phase-locked amplifier is introduced in this paper. The overall design was verified. The simulation results confirm that the design is feasible.