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CCD vs. CMOS


Posing a great challenge to the traditional Charge Coupled Devices (CCD) in various applications, CMOS image sensors have improvised themselves with time, finding solutions for the problems related with the noise and sensitivity. The use of Active Pixel Sensors having its foundation with the sub-micron technologies have helped to attain low power, low voltage and monolithic integration allowing. The manufacture of miniaturised single-chip digital cameras is an example of this technology.
The incorporation of advanced techniques at the chip or pixel level has opened new dimensions for the technology. Now after a decade, the initial tussle over the advocacy regarding the emergence of complementary-metal-oxide-semiconductor (CMOS) technology over the charge-coupled device (CCD) have slowly dropped showing the strengths and weakness of the technologies.

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CCD vs. CMOS “ Image
ABSTRACT
CMOS image sensors are today challenging the existing Charge Coupled Devices (CCD) in several application fields. Improved architecture and processes have to a large extent overcome early weaknesses of CMOS imagers, namely with respect to noise and sensitivity. Todayâ„¢s Active Pixel Sensors are typically based on sub-micron technologies that have advantages with respect to low power, low voltage and monolithic integration allowing, for example the manufacture of miniaturised single-chip digital cameras. The integration of added functionality on the chip or even at the pixel level also opens up completely new horizons. Nearly a decade has passed since complementary-metal-oxide-semiconductor (CMOS) imaging detectors began to make their move into the charge-coupled device (CCD) detector arena. Initial claims made by proponents of the new technology generated intense competition between groups. This controversy has finally begun to subside, however, as clear indicators now show where performance strengths and weaknesses really lie. This seminar intends to cover the basics of digital imaging and a review of the advantages and disadvantages of both the CCD and CMOS technologies.