Design of a New Digital Lock-in Amplifier and Its Optimization Algorithm
Ling Lin · Journal of Tianjin University Science and Technology · 2008
In order to improve the precision of detection signal and predigest the constructive circuit of digital lock-in amplifier(DLIA),oversampling was applied in DLIA and a quick algorithm was presented to deal with the problem of a mass of data caused by oversampling in this paper,which reduced data memory largely and promoted the speed of operation rapidly.The results show that this method increases DLIA's precision,reduces its volume and raises the capability/price ratio without high performance microprocessor,and can be applied in weak signal detection widely.