Optimal performance of CMOS compatible IR thermoelectric sensors

Autor:	Yael Nemirovsky, O. Bochobza-Degani, Eran Socher
Rok vydání:	2000
Předmět:	Engineering Cantilever Pixel business.industry Mechanical Engineering Bandwidth (signal processing) Time constant Aspect ratio (image) Square root Thermoelectric effect Electronic engineering Electrical and Electronic Engineering business Noise-equivalent power
Zdroj:	Journal of Microelectromechanical Systems. 9:38-46
ISSN:	1941-0158 1057-7157
Popis:	This paper presents a theoretical and empirical study of the optimal performance of CMOS compatible infrared thermoelectric sensors with varying pixel area and different aspect ratio of the pixels for two possible sensor structures: cantilever and bridge types. Optimal performance is analyzed analytically, using simplifying assumptions. This analysis is verified by comparing with the exact simulations as well as by comparing with measured results. The resistance of optimized sensors in the sense of minimal noise equivalent power (NEP) is shown to be independent of aspect ratio, but proportional to the third root of the pixel area. The product of the optimal NEP and the square root of the time constant is shown to be constant with varying aspect ratios, while the same applies with the time constant to the power of 3/8 for varying areas. The measured sensors exhibit NEP's down to 13.5 nW in a 300-Hz bandwidth and time constants up to 30 ms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6473356f90649edac20ae774909a2ff5 https://doi.org/10.1109/84.825775 Zobrazit plný text záznamu