Eric Fossum

Richard, I think you are correct. BTW, here is one of my favorite papers which dates from 2001. We used two different signal chains with different gains, and two different sensitivity ...

BTW, in the QIS patent specification (circa 2005) it is mentioned that color filter can cover a single jot or a group of jots. This is because it can reduce color cross talk and also make it easier ...

meh, Honestly, nothing in here of interest.  And there seems to be a disconnect between figures and captions - if not intentional then really strange. Worst case was the TCAD charge transfer ...

The QIS concept (aka DFS) started when my friend Junichi Nakamura was planning his book on Image Sensors and Signal Processing for Digital Still Cameras . He asked me to write the last chapter on ...

The improved link is now edited as above. Thanks Dan for posting this post. The IEEE Spectrum Chip Hall of Fame is something all of us former Photobit-ers feel quite good about.  I feel bad about ...

I am not sure I would put it that way, unless there is a baby-development joke in there. She worked at JPL pretty much up until our daughter was born. Then a couple of months after that, while on ...

I have written to LDV Capital to ask why they deleted or privatized the video. Stay tuned.

Me too. Seem like photon shot noise impact on IQ is quite different if the photon signal is all in one pixel (and the rest of the image is black) vs. spread out at low level across the image. PS. ...

If the dark current were the same in every pixel every time then it would NOT be considered noise, just sort of an offset. In an image it would appear as a sort of fog if the offset were not ...

The so-called doubling temperature depends on the device, and either goes as the bandgap or half the bandgap.  Half the bandgap is fairly common which gives a doubling temperature of 10C.  Full ...

Yes, this is due to white noise in the CCD source-follower transistor, whose total impact can be reduced when operating at lower frequencies.

This is not really a sensor temperature issue (glow is not due to a hot amplifier circuit). The glow is due to collision of transistor electrons with the silicon lattice, leading to near-band gap ...

This is to reduce dark current to allow very long exposure periods. This is different from  readout noise, which is mostly unsupressed 1/f noise from the in-pixel source follower. There is a ...

Yes.  Will you ever notice?  Probably not. It is a small effect over normal living temperature ranges.

Mostly true, if you stay in the analog domain.  Once you put in a quantizer (ADC) for each pixel output, before summing pixels, things can get more complicated. Also, the maximum SNR advantage ...

Autofocus is done by voice coil, which is a spring and electromagnet system. I would not be surprised if it is affected by gravity.  It is just a spring. Unfortunately it has been the lowest cost ...

That reminds me of this P900 photo I took in 2016. Guys with more glass lost the opportunity to get this shot from a moving boat.  Also, hand held. Gotta love OIS. P900 COOLPIX P900 ƒ/5.6 1/500 ...

Just FYI, I love my P900 and it has gone with me on several safaris overseas, and taken as good or better shots than guys lugging around a lot of glass, especially when things are happening in ...

Mike, it looked to me like RS was not biased as a cascode device but perhaps that was your intention all along. On the other hand, the CS source voltage will be hard to keep quiet in an array ...

hi Mike, Thank you for sharing your CS idea. Generally a CS amp will work but any improvement is offset by a few factors.  (1) CS-drain is about equal to Vout so you get gate-drain Miller ...