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Signal-to-noise ratio analysis and optimization on digital readout integrated circuit for microbolometric focal plane array

XIQU CHEN1,* , MENGYUN WANG1, CHAO FANG1

Affiliation

  1. School of Electrical & Electronic Engineering, Wuhan Polytechnic University, Wuhan, China

Abstract

The signal-to-noise ratio of readout integrated circuit is a vital parameter for microbolometric focal plane array to decide its noise equivalent temperature difference, which often restricts the temperature resolution of infrared image system. The noise and responsivity of microbolometric focal plane array with digital readout integrated circuit are theoretically analyzed, based on which the theoretical signal-to-noise ratio expression is achieved. According to the theoretical expression, a new kind of optimized digital readout integrated circuit for microbolometric focal plane array is proposed in this paper. The optimized digital readout integrated circuit is utilized to digitalize the infrared response signal with pulse frequency modulation not conventional pulse width modulation. Theoretical discussion and experimental verification make it known that the optimized digital readout integrated circuit has excellent performance characteristics such as low noise and high responsivity..

Keywords

Digital readout integrated circuit, Signal-to-noise ratio, Microbolometric focal plane array.

Submitted at: Jan. 13, 2025
Accepted at: Dec. 4, 2025

Citation

XIQU CHEN, MENGYUN WANG, CHAO FANG, Signal-to-noise ratio analysis and optimization on digital readout integrated circuit for microbolometric focal plane array, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 11-12, pp. 557-561 (2025)