Design of Current-Type Readout Integrated Circuit for 160 × 120 Pixel Array Applications

Title & Authors
Design of Current-Type Readout Integrated Circuit for 160 × 120 Pixel Array Applications
Jung, Eun-Sik; Bae, Young-Seok; Sung, Man-Young;

Abstract
We propose a Readout Integrated Circuit (ROIC), which applies a fixed current bias sensing method to the input stage in order to simplify the circuit structure and the infrared sensor characteristic control. For the sample-and-hold stage to display and control a signal detected by the infrared sensor using a two-dimensional (2D) focal plane array, a differential delta sampling (DDS) circuit is proposed, which effectively removes the FPN. In addition, the output characteristic is improved to have wider bandwidth and higher gain by applying a two-stage variable gain amplifier (VGA). The output characteristic of the proposed device was 23.91 mV/$\small{^{\circ}C}$, and the linearity error rate was less than 0.22%. After checking the performance of the ROIC using HSPICE simulation, the chip was manufactured and measured using the SMIC 0.35 um standard CMOS process to confirm that the simulation results from the actual design are in good agreement with the measurement results.
Keywords
Readout IC;Microbolometer;Infrared ray;Image sensor;
Language
English
Cited by
1.
Bolometer-Type Uncooled Infrared Image Sensor Using Pixel Current Calibration Technique, Journal of Sensor Science and Technology , 2016, 25, 5, 349
2.
An Analog Front-End IC Design for 320 $\times$ 240 Microbolometer Array Applications, IEEE Transactions on Circuits and Systems II: Express Briefs, 2015, 62, 11, 1048
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