My brother-in-law dropped his girlfriend's video camera onto some rocks and totally smashed it, so I took it apart and am trying to understand the CCD, a Sony ICX226AK, which wasn't damaged at all.
Sony provides a datasheet describing the vertical and horizontal clocking requirements in a way that if you already understand the chip, you could probably make sense of them, but I can't figure out a few things - can anyone help?
Overall, there are 4 vertical clock lines and two horizontal clock lines. The vertical clocks shift charges into a horizontal shift register, then the horizontal clocks shift the linear register out to the output pin for ADC conversion.
There are four vertical lines because of the way it detects color, with what they call complementary color mosaic filters; it's a little complicated and I don't completely understand it but doesn't look too hard to eventually figure out.
The ccd is an interline transfer design. The data sheet shows that two of the four vertical clock lines seem to have three states; V1 and V3 both have an additional high-going pulse that I guess does the interline image transfer, but nothing in the data sheet describes this at all. Can anyone expand on that?
There are two horizontal clock lines and a reset clock line, but no description of how they must be used. There is a single diagram showing that it appears that the two horizontal lines are clocked exactly in opposite phase, and I guess that after every transition, you measure the output then pulse the reset pin to clear the charge. Does this sound right?
Thanks for any help,
David
Sony provides a datasheet describing the vertical and horizontal clocking requirements in a way that if you already understand the chip, you could probably make sense of them, but I can't figure out a few things - can anyone help?
Overall, there are 4 vertical clock lines and two horizontal clock lines. The vertical clocks shift charges into a horizontal shift register, then the horizontal clocks shift the linear register out to the output pin for ADC conversion.
There are four vertical lines because of the way it detects color, with what they call complementary color mosaic filters; it's a little complicated and I don't completely understand it but doesn't look too hard to eventually figure out.
The ccd is an interline transfer design. The data sheet shows that two of the four vertical clock lines seem to have three states; V1 and V3 both have an additional high-going pulse that I guess does the interline image transfer, but nothing in the data sheet describes this at all. Can anyone expand on that?
There are two horizontal clock lines and a reset clock line, but no description of how they must be used. There is a single diagram showing that it appears that the two horizontal lines are clocked exactly in opposite phase, and I guess that after every transition, you measure the output then pulse the reset pin to clear the charge. Does this sound right?
Thanks for any help,
David