Noise of short-time integrators for readout of uncooled infrared bolometer arrays
As state-of-the-art readout circuits short-time integrators in Far Infrared (FIR) uncooled bolometer arrays are commonly used. This paper compares the transfer functions of an ideal continuous-time integrator with that of a real integrator with focus an OTA parameters and noise analysis. Beside the...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
2010-10-01
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| Series: | Advances in Radio Science |
| Online Access: | http://www.adv-radio-sci.net/8/129/2010/ars-8-129-2010.pdf |
| Summary: | As state-of-the-art readout circuits short-time integrators in Far Infrared
(FIR) uncooled bolometer arrays are commonly used. This paper compares the
transfer functions of an ideal continuous-time integrator with that of a
real integrator with focus an OTA parameters and noise analysis. Beside the
noise sources at the non-inverting input of the OTA special care has to be
taken to account for capacitances at the inverting input. The Noise
Equivalent Temperature Difference (NETD) as the key parameter for bolometer
applications for a real short-time integrator will be derived. As the result
it will be shown, that the NETD is 1/<i>f</i>-noise limited. |
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| ISSN: | 1684-9965 1684-9973 |