An optimum reference detector design for uncooled microbolometer FPAs

Tepegoz, Murat; Çivitçi, Fehmi; Akın, Tayfun

doi:10.1117/12.786611

Cited by 5 publications

(32 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The characteristics of the microbolometer IRFPA used for this study are summarized in Table 1. [16][17][18][19] The temperatures of the microbolometer calculated by the CL, FAG, and ETC models, respectively, are shown in Fig. 1.…”

Section: Applications Of the Models And Discussionmentioning

confidence: 99%

“…[13][14][15][16][17][18][19] ΔT ¼ T d − T a . Also, T d , T a , and P are the detector temperature, the constant ambient temperature, and the heat source, respectively.…”

Section: Electro-thermal Feedback Modelsmentioning

confidence: 99%

“…However, decreasing the bias time, which determines the integration time, is not desirable since it increases the noise bandwidth, and hence the noise equivalent temperature differenc. [15][16][17] As a result, it is of high importance to understand the electro-thermal feedback effect as correctly as possible.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the correct understanding of the electro-thermal effect leads not only to a more accurate signal prediction in the development, but also to the proper use of an IRFPA in the application period. [13][14][15][16][17][18] In this article, two analytical models for the electro-thermal feedback effect in the microbolometer IRFPA are presented. The electro-thermal feedback effect starts when the bias is applied to read the resistance change of the microbolometer in IRFPA.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9][10][11] The accurate performance prediction of the high-density microbolometer IRFPA is also one of the emerging challenges. [8][9][10][11][12][13][14][15][16] In order to make a reasonable performance prediction of a highly optimized and high-density microbolometer IRFPA, the correct understanding of the electro-thermal phenomena that occur in a microbolometer IRFPA is essentially required. Since the electro-thermal effect is related to the temperature change and the electronic state change of a sensing material, this effect is inherent in a thermal detector like the microbolometer.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Analytical model for the electro-thermal feedback effect in a microbolometer infrared focal plane array

2014

View full text Add to dashboard Cite

Abstract. An analytical model for the electro-thermal feedback effect in a microbolometer infrared focal plane array is presented. The presented model is the integrated optical-electro-thermal model, in which the electrothermal feedback effect incorporated with the response of incident IR can be described. In addition, since the model is based on physics, the model parameters also have their own physical meaning. This analytical model can be easily utilized to describe the temperature increase caused by the applied heat sources and has a unique feature describing capability of optical-electro-thermal analysis in a quasi-steady-state, which can hardly be performed with thermal analysis tools based on the finite element method. The model shows that the temperature of the microbolometer in this study can be increased 7.1% to 18.6% more by the electro-thermal feedback effect. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

show abstract

Section: Applications Of the Models And Discussionmentioning

confidence: 99%

“…[13][14][15][16][17][18][19] ΔT ¼ T d − T a . Also, T d , T a , and P are the detector temperature, the constant ambient temperature, and the heat source, respectively.…”

Section: Electro-thermal Feedback Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analytical model for the electro-thermal feedback effect in a microbolometer infrared focal plane array

2014

View full text Add to dashboard Cite

show abstract

Offset calibration technique for capacitive transimpedance amplifier used in uncooled infrared detection

Ahmed

Aboudina

Habib

2016

Microelectronics Journal

View full text Add to dashboard Cite

A bias heating cancellation method for resistive uncooled microbolometer detectors

2009

Self Cite

View full text Add to dashboard Cite

This paper proposes a new method to suppress the bias heating effect of the resistive uncooled microbolometer detectors. The bias heating effect especially limits the performance where long integration time and large detector bias voltages are required. The proposed method uses a number of reference detectors for each column of the FPA where the reference detectors have an optimized thermal conductance and are covered by an infrared reflecting material in order to achieve high infrared blindness. The heating and cooling durations of the reference detectors are optimized so that the heating characteristic and the stabilized temperature of the reference detectors are similar to those of the active detectors. Additionally, a resistance mismatch between the reference detectors and the active detectors is introduced in order to match the thermal characteristics and to obtain maximum bias heating cancellation. This intentional mismatch is compensated with a series-connected CMOS resistor to keep the balance in the CTIA circuit. The simulation results show that it is possible to cancel 97.6% of the resistance change due to bias heating with the use of this method, making it possible to increase the gain of the column readout by a factor of about 41.

show abstract

An optimum reference detector design for uncooled microbolometer FPAs

Cited by 5 publications

References 0 publications

Analytical model for the electro-thermal feedback effect in a microbolometer infrared focal plane array

Analytical model for the electro-thermal feedback effect in a microbolometer infrared focal plane array

Offset calibration technique for capacitive transimpedance amplifier used in uncooled infrared detection

A bias heating cancellation method for resistive uncooled microbolometer detectors

Contact Info

Product

Resources

About