Design of low noise amplifier for sensor applications

This paper presents a comparative study of different existing Low Noise Amplifier (LNA) for Low frequency sensor application. The focus of this paper is on conditioning low frequency sensor signal like for biomedical signal acquisition, seismic wave alertness system etc, the design is more concentrated on some applications like seismic detection, where unpredictability and unknown nature of seismic signal is a concerned factor. The Differential Difference Amplifier(DDA) architecture discussed here may be suitable for micro power sensor interface in scaled CMOS Technology.