The synchronous detector on the basis of sequence filters

Abstract

The synchronous detector on the basis of sequence filters

Sabirov T.N.

Incoming article date: 17.06.2018

Need for measurement of weak signals exists in many fields of science and technology. An example of such area is the optical spectroscopy of substances with low concentration of the centers of coloring. Use of devices of synchronous detecting allows to solve this problem. The need for the reliable, inexpensive and convenient device in use defines interest in development of the new schemes meeting these requirements. In this work the new scheme of the programmable synchronous detector with use of sequence filters and the digital phase shifter is offered. Advantages of the offered scheme is the high sensitivity and low cost in comparison with commercial versions of synchronous detectors.

Keywords: lock in amplifier ,sequence filter, detecting, phase shifter