As we know Canon Inc. already developed an APS-H-size (approx. 29.2 x 20.2 mm) CMOS sensor on September, 2015 which comes with approximately 250 million pixels (19,580 x 12,600 pixels), since the world’s highest number of pixels for a CMOS sensor smaller than the size of a 35 mm full-frame sensor.
Now, after more than four months, Canon again remind all the details about the developed 250 Mpixel APS-H size sensor at the the ISSCC 2016 Conference.
The details via Harvest Imaging as follows:-
Hirofumi Totsuka of Canon presented a 250 Mpixel APS-H size imager: 1.5 um pixel pitch (4 sharing) made in 0.13 um technology node. The device is consuming 1.97 W at full resolution 5fps. An interesting build-in feature of this sensor is the following: ALL pixel signals are converted by column SS-ADCs with a single ramp, but in front of the ADC, each column has its own PGA that can be switched to 4x or 1x gain, depending on the signal level. So when the pixels are sampled, a first check is done to look whether the signal is above or below a particular reference level, and then the right gain of the PGA is set to 1x or 4x. Simple method, but I think that the issues pop up in the reconstruction of the signal at the cross-over point between the two settings of the PGA.
Hence, such detail doesn’t make the way for APS-H body b-based camera but it is expected that the 250mp APS-H Image Sensor likely to be sported in a full frame body in coming days.
So, it is quick to make any comment over the strategy of Canon, what it keeps under arm for coming days.
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