Digital Noise Generators with Programable Spectrum – Solution for Laboratory Environment and Transports Sensors Tests

Abstract

Generally, regarding the sensors, the real environment has lot of perturbative influence, especially in case of the outdoor applications. In transports, medical, military and other domains, the stress over the outdoor sensors increases daily, mostly because the continuous-additive factors: noise, vibration, dust. One of the most useful tools for reproducing the stress conditions, both in laboratory conditions but also in field is a white noise generator, which is able to ensure high frequency spectrum, constant amplitude signal. The work makes an analysis over white noise generation techniques and aims a proposal of functional solution for obtain white noise only in necessary spectrum, according to each particular application.