Developing of an ultra low noise bolometer biasing circuit
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Noise in electronic circuits can sometimes cause problems. It is especially problematic in for example high sensitive sensors and high end audio and video equipment. In audio and video equipment the noise will make its way into the sound and picture reducing the overall quality. Sensors that are constructed to sense extremely small changes can only pick up changes larger than the noise floor of the circuit. By lowering the noise, sensors can achieve higher accuracy.
This thesis presents an ultra low noise solution of the biasing circuitry to the bolometer used in one of FLIR Systems high end cameras. The bolometer uses different adjustable direct current voltage sources and is extremely sensitive to noise. The purpose is to improve the picture quality and the thermal measurement resolution. A prototype circuit was constructed and in the end of the thesis a final circuit with successful result will be presented.
Place, publisher, year, edition, pages
2016. , 42 p.
UPTEC F, ISSN 1401-5757 ; 16018
low noise, ultra low noise, bolometer, biasing, thermal, noise, filter, 1/f-noise, sensors, image sensor, DAC
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:uu:diva-296698OAI: oai:DiVA.org:uu-296698DiVA: diva2:939466
FLIR Systems AB
Master Programme in Engineering Physics
Nyberg, TomasZimmermann, Uwe, PhD