Dark current fixed pattern noise reduction for the 2/3-in two-million pixel HDTV STACK-CCD imager

1997 ◽  
Vol 44 (10) ◽  
pp. 1658-1662 ◽  
Author(s):  
N. Sakaguchi ◽  
N. Nakamura ◽  
S. Ohsawa ◽  
Y. Endo ◽  
Y. Matsunaga ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Dark Current ◽  
Pattern Noise ◽  
Fixed Pattern Noise

scholarly journals Averaging Pixel Current Adjustment Technique for Reducing Fixed Pattern Noise in the Bolometer-Type Uncooled Infrared Image Sensor

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1653
Author(s):  
Sang-Hwan Kim ◽  
Byoung-Soo Choi ◽  
Jimin Lee ◽  
Junwoo Lee ◽  
Jewon Lee ◽  
...  
Keyword(s):  
Dark Current ◽  
Small Deviation ◽  
Infrared Image ◽  
Image Sensor ◽  
Cmos Process ◽  
Readout Circuits ◽  
Active Pixel ◽  
Reference Pixel ◽  
Pattern Noise ◽  
Fixed Pattern Noise

In this paper, we propose an averaging pixel current adjustment technique for reducing fixed pattern noise (FPN) in the bolometer-type uncooled infrared image sensor. The averaging pixel current adjustment technique is composed of active pixel, reference pixel, and calibration circuit. Polysilicon resistors were used in each active pixel and reference pixel. Resistance deviation among active pixels integrated with the same resistance value cause FPN. The principle of the averaging pixel current adjustment technique for removing FPN is based on the subtraction of dark current of the active pixel from the dark current of the reference pixel. The subtracted current is converted into the voltage, which contains pixel calibration information. The calibration circuit is used to adjust the calibration current. After calibration, the nano-ampere current is output with small deviation. The proposed averaging pixel current adjustment technique is implemented by a chip composed of a pixel array, a calibration circuit, average current generators, and readout circuits. The chip was fabricated using a standard 0.35 μm CMOS process and its performance was evaluated.

A CMOS Imager With Column-Level ADC Using Dynamic Column Fixed-Pattern Noise Reduction

2006 ◽  
Vol 41 (12) ◽  
pp. 3007-3015 ◽  
Author(s):  
Martijn F. Snoeij ◽  
Albert J. P. Theuwissen ◽  
Kofi A. A. Makinwa ◽  
Johan H. Huijsing
Keyword(s):  
Noise Reduction ◽  
Cmos Imager ◽  
Pattern Noise ◽  
Fixed Pattern Noise
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