Exquisite Design of a CCD Analog Front End Module

Abstract

One of the key technologies for high-resolution camera is the analog front end (AFE) design, which is between the lens and image system process (ISP). The 2 major evaluations of AFE are to evaluate the noise and the ratio between the RGB pixels. Hence, based on the charge coupled device (CCD) image sensor, we present our proposed AFE design to evaluate the CCD noise of the output image with a lower dark current. Our proposed AFE board design is to employee the 1080p (1920×1080) CCD image sensor and its corresponding timing controller with the digital-analog converter (ADC). Our results indicate that our design has the high performance among 6 different digital brands in the low noise applications. Moreover, the CCD sensors with the different resolutions can be installed within the same socket of our AFE board, which can also simultaneously support 3 types, Bayer, Truesense, and Black/White, color filter array.

Implementation of a parallel-beam optical-CT apparatus for three-dimensional radiation dosimetry using a high-resolution CCD camera

“…The CCD output signal will be changed with varying incident light. However, in the absence of a CCD image sensor, when the light enters there will still be a slight signal output, caused by the effects of dark current and bias clamp [15]. Among these issues, the dark current is limited mainly by the temperature and the exposure time, while the bias clamp is due mainly to the amplifier in the signal conversion.…”