tag:blogger.com,1999:blog-19092890.post3924901645133331094..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: EPFL Proposes 5T Pixel with 0.32e- Noise and Enhanced DRVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-19092890.post-15193340633062194952020-04-27T12:32:26.517+03:002020-04-27T12:32:26.517+03:00My feeling is that body-effect less PMOS source fo...My feeling is that body-effect less PMOS source follower does remove the gate capacitance by Miller effect. So the only capacitance on SN node will be the tiny diffusion and some stray capacitance, their value is small and the consequent conversion gain is high. <br />So it's possible to have single electron detection on SN node. Then photo electrons generated by PPD will be able to reach SN node with non-unity probability. If the image lag is ignored, then it impacts the equivalent QE by some kind of 'excess noise factor' ...YangNIhttps://www.blogger.com/profile/14424444367081117570noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-39489034254524642152020-04-27T10:26:20.805+03:002020-04-27T10:26:20.805+03:00I guess different kTC noise level between IN and S...I guess different kTC noise level between IN and SN node would prevent charge transfer from IN to SN.Anonymoushttps://www.blogger.com/profile/04804497070498544449noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-87589903024847180752020-04-26T18:42:27.197+03:002020-04-26T18:42:27.197+03:00No physics under the device operation is given, th...No physics under the device operation is given, this is not a good paper.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-24407038834951584522020-04-26T14:02:40.153+03:002020-04-26T14:02:40.153+03:00Also, some concern about the PCH peaks not being r...Also, some concern about the PCH peaks not being regularly spaced, or so it seems, and concern about the negative photoelectron-number "peaks." Probably more measurements of the PCH would lead to a clearer result. And if it didn't, that would also be a source of concern.Eric R Fossumhttps://www.blogger.com/profile/09740612324630105312noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-57060349084183855572020-04-26T13:33:02.654+03:002020-04-26T13:33:02.654+03:00The paper has several technological issues, but it...The paper has several technological issues, but it also has a few interesting ideas. It is good to publish these papers to give us new ideas and of course, the chance to improve their implementation so as to solve the afore-mentioned issues. <br /><br />The lag of 10% is pretty substantial, but even the baseline 4T device seems to have substantial lag. Lag from IN will depend on its capacitance, and perhaps for some applications, the lag is not critical. For true photon-counting applications, the lag is critical and I am not convinced a single photoelectron won't get lost or delayed in IN depending on the history. Nevertheless, it is important to me that new ideas, even if not perfect, get published and shared.Eric R Fossumhttps://www.blogger.com/profile/09740612324630105312noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-7945832816008275852020-04-26T11:21:57.555+03:002020-04-26T11:21:57.555+03:00This is a very good questionThis is a very good questionVladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-56787170147070692102020-04-26T11:20:01.358+03:002020-04-26T11:20:01.358+03:00It is SF, just pmos type SF.It is SF, just pmos type SF.Vladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-30266656538376554042020-04-26T00:38:17.696+03:002020-04-26T00:38:17.696+03:00I wonder how the charge transfer between IN and SN...I wonder how the charge transfer between IN and SN can be lag-free?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-9742258877730662012020-04-26T00:35:20.979+03:002020-04-26T00:35:20.979+03:00It seems it's not a SF architecture. It's ...It seems it's not a SF architecture. It's a common-source with source degeneration as negative feedback to reduce the gain variation and give better input common mode range. This structure has lots of issues when use it in an array of pixels. Gain variation, linearity issues, swing issues. Maybe that's why they did not present any output image in this paper. Similar to some of Albert's recent works.Anonymousnoreply@blogger.com