tag:blogger.com,1999:blog-19092890.post1554458420642886618..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: Canon Presents 1MP SPAD Imager PrototypeVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-19092890.post-10402304333961978772020-06-27T15:57:17.804+03:002020-06-27T15:57:17.804+03:00Hello Anonymous,
Personally I have always wondere...Hello Anonymous,<br /><br />Personally I have always wondered about this so a while back I got in touch with the author's of the Canon/EPFL and Panasonic works and they both kindly offered their point of view. <br /><br />What I understood is that although the device uses avalanche multiplication there was no quantification of its quench behavior. Also, while the device did show a high avalanche gain of 10^4 you could say it is relatively lower than a typical SPAD device gain of 10^6 or so. So strictly speaking it is an APD sensor. Panasonic certainly made a point of their 'capacitive quenching' technique in later publications and only then do they explicitly refer to their VAPD as a SPAD.<br /><br />Nevertheless the 2016 VAPD Panasonic sensor is certainly worth a mention as it achieved avalanche based single photon counting at such a small pitch and high resolution early on compared to typical SPAD ones.<br /><br />The attractiveness of SPADs remains in their time-resolved capability which subsequent Panasonic sensors and this Canon/EPFL sensor offer. The continuous drive towards ever smaller and high resolution SPAD sensors by Canon/EPFL and Panasonic in form of the VAPD are undoubtedly tremendous achievements!<br /><br />TarekAnonymoushttps://www.blogger.com/profile/14465298894962620054noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-24384289072646381012020-06-26T04:13:21.395+03:002020-06-26T04:13:21.395+03:00There is an open access paper on this work: https:...There is an open access paper on this work: https://www.osapublishing.org/optica/abstract.cfm?uri=optica-7-4-346<br /><br />there are 2 flavors of pixels - both 9.4 um. One pixel uses per SPAD 1bit memory and consumes 284 mW @ 24kfps. The other device uses transistor sharing for the read path and hence achieves better FF/PDE but consumes much more power 535 mW. Unclear why that is the case. Both SPADs have impressively small median DCR of ~<2 cps at room temperature. Power should largely depend the light intensity (amount of avalanche bursts) - unclear at which light level this was evaluated - couldn't find anything in the paperAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-76522358534033764622020-06-25T12:26:48.327+03:002020-06-25T12:26:48.327+03:00Any figure on pitch, size or power?Any figure on pitch, size or power?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-37949618380548609672020-06-24T21:17:06.286+03:002020-06-24T21:17:06.286+03:00First ~MP should be from Panasonic ISSCC 2016 (alb...First ~MP should be from Panasonic ISSCC 2016 (albeit with some rounding)Anonymousnoreply@blogger.com