A High-Resolution CMOS Image Sensor with Hadamard Transform Function

Kousuke KATAYAMA; Atsushi IWATA

A High-Resolution CMOS Image Sensor with Hadamard Transform Function

Kousuke KATAYAMA, Atsushi IWATA

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This paper proposes a high-resolution CMOS image sensor, which has Hadamard transform function. This Hadamard transform circuit consists of two base generators, an array of pixel circuits, and analog-to-digital converters. In spite of simple composition, a base generator outputs a variety of bases, a pixel circuit calculates a two-dimensional base from one-dimensional bases and outputs values to common line for current addition, and analog-to-digital converter converts current value to digital value and stabilize a common line voltage for elimination of parasitic capacitance. We simulated these circuit elements and optimized using SPICE. Basic operations of this Hadamard transform circuit are also confirmed by simulation. A 256 256 pixel test chip was designed in 4.73 mm 4.73 mm area with 0.35 µm CMOS technology. A fill factor of this chip is 42% and dynamic range is 55.6 [dB]. Functions of this chip are Hadamard transform, Harr transform, projection, obtaining center of gravity, and so on.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E86-A No.2 pp.396-403

Publication Date: 2003/02/01

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Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)

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Kousuke KATAYAMA, Atsushi IWATA, "A High-Resolution CMOS Image Sensor with Hadamard Transform Function" in IEICE TRANSACTIONS on Fundamentals, vol. E86-A, no. 2, pp. 396-403, February 2003, doi: .
Abstract: This paper proposes a high-resolution CMOS image sensor, which has Hadamard transform function. This Hadamard transform circuit consists of two base generators, an array of pixel circuits, and analog-to-digital converters. In spite of simple composition, a base generator outputs a variety of bases, a pixel circuit calculates a two-dimensional base from one-dimensional bases and outputs values to common line for current addition, and analog-to-digital converter converts current value to digital value and stabilize a common line voltage for elimination of parasitic capacitance. We simulated these circuit elements and optimized using SPICE. Basic operations of this Hadamard transform circuit are also confirmed by simulation. A 256 256 pixel test chip was designed in 4.73 mm 4.73 mm area with 0.35 µm CMOS technology. A fill factor of this chip is 42% and dynamic range is 55.6 [dB]. Functions of this chip are Hadamard transform, Harr transform, projection, obtaining center of gravity, and so on.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e86-a_2_396/_p

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@ARTICLE{e86-a_2_396,
author={Kousuke KATAYAMA, Atsushi IWATA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A High-Resolution CMOS Image Sensor with Hadamard Transform Function},
year={2003},
volume={E86-A},
number={2},
pages={396-403},
abstract={This paper proposes a high-resolution CMOS image sensor, which has Hadamard transform function. This Hadamard transform circuit consists of two base generators, an array of pixel circuits, and analog-to-digital converters. In spite of simple composition, a base generator outputs a variety of bases, a pixel circuit calculates a two-dimensional base from one-dimensional bases and outputs values to common line for current addition, and analog-to-digital converter converts current value to digital value and stabilize a common line voltage for elimination of parasitic capacitance. We simulated these circuit elements and optimized using SPICE. Basic operations of this Hadamard transform circuit are also confirmed by simulation. A 256 256 pixel test chip was designed in 4.73 mm 4.73 mm area with 0.35 µm CMOS technology. A fill factor of this chip is 42% and dynamic range is 55.6 [dB]. Functions of this chip are Hadamard transform, Harr transform, projection, obtaining center of gravity, and so on.},
keywords={},
doi={},
ISSN={},
month={February},}

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TY - JOUR
TI - A High-Resolution CMOS Image Sensor with Hadamard Transform Function
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 396
EP - 403
AU - Kousuke KATAYAMA
AU - Atsushi IWATA
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E86-A
IS - 2
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - February 2003
AB - This paper proposes a high-resolution CMOS image sensor, which has Hadamard transform function. This Hadamard transform circuit consists of two base generators, an array of pixel circuits, and analog-to-digital converters. In spite of simple composition, a base generator outputs a variety of bases, a pixel circuit calculates a two-dimensional base from one-dimensional bases and outputs values to common line for current addition, and analog-to-digital converter converts current value to digital value and stabilize a common line voltage for elimination of parasitic capacitance. We simulated these circuit elements and optimized using SPICE. Basic operations of this Hadamard transform circuit are also confirmed by simulation. A 256 256 pixel test chip was designed in 4.73 mm 4.73 mm area with 0.35 µm CMOS technology. A fill factor of this chip is 42% and dynamic range is 55.6 [dB]. Functions of this chip are Hadamard transform, Harr transform, projection, obtaining center of gravity, and so on.
ER -