Rothwell, Figg, Ernst & Manbeck
Image signal processing apparatus for image sensor
An image signal processing apparatus of the present invention comprises an image sensor for outputting an image data, a sample hold circuit for holding an image data output, a sample hold circuit outputs an analog signal, AD converter for converting the analog signal to a digital signal, a system clock generator for generating a first clock &phgr; 1, a timing generator for controlling hold timing of sample hold circuit according to the first clock &phgr; 1, a second system clock generator for generating a second system clock &phgr; 2 having different phase from the phase of the first system clock &phgr; 1 and AD conversion clock generator for controlling conversion timing of AD converter according to the second clock &phgr; 2. Since two different clocks are used, hold timing does not overlap with a conversion timing. Therefore, the reading of the image data becomes stable and misreading can be reduced and also quality of an image is improved.
Mitsubishi Denki Kabushiki Kaisha
H
H04N
inventional
Hiromi
Yamashita