tag:blogger.com,1999:blog-19092890.post6511168209791027200..comments2021-05-12T22:24:18.676+03:00Comments on Image Sensors World: CMOSIS Pre-Announces Fast & Large 2MP SensorVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger22125tag:blogger.com,1999:blog-19092890.post-9548466544953594422016-10-25T06:26:22.175+03:002016-10-25T06:26:22.175+03:00May I know readout noise of CSI2100?May I know readout noise of CSI2100?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-45527119640743544622015-12-03T10:31:00.414+02:002015-12-03T10:31:00.414+02:00Pixel noise is the standard deviation measured ove...Pixel noise is the standard deviation measured over number of frames so the noise can be any number between zero and one.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-28992745600701669952015-12-03T08:44:12.616+02:002015-12-03T08:44:12.616+02:00Measure a number of times and average the result?Measure a number of times and average the result?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-3263570649916407522015-12-03T03:00:17.195+02:002015-12-03T03:00:17.195+02:00I beg your pardon... but since I'm in the bus...I beg your pardon... but since I'm in the business of designing and building these so called "IS" units, I'm almost certain that I do not confuse anything right now.<br /><br />bottom line is that if you have an ADC with 1024 LSBs, the best it can do is display a full range of 1024:1. Even if the ADC had zero noise, it makes not difference since it can't display anything between 0 and 1, 1 and 2, 2 and 3, etc. Hence... it can't convey information about 1440 levels of brightness.<br /><br />And since most ADCs don't come anywhere near ideal numbers (12B ADCs have typical ENOB's of 10, 14B ADCs have a bit over 12 and 16B ADCs a bit over 14), and since most CIS ADCs have similar numbers, I don't see how a 10B ADC can ever provide enough dynamic range to handle 2Me.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-8470936118542111922015-12-02T14:05:38.992+02:002015-12-02T14:05:38.992+02:00Albert has a blog post which I think covers the co...Albert has a blog post which I think covers the confusion. The ADC does not cover the full range of the sensor only the linear portion. http://harvestimaging.com/blog/?p=1238Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-44861575591271922592015-12-02T09:00:25.479+02:002015-12-02T09:00:25.479+02:00 You still confuse LSB with q. noise and you still... You still confuse LSB with q. noise and you still confuse Telekom ADCs with IS ADC...Can some experts explain this for all? Cmosis, Albert, Erik?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-49374087370133310542015-12-02T00:19:18.014+02:002015-12-02T00:19:18.014+02:00I agree, some ADC's are nearly ideal. And the...I agree, some ADC's are nearly ideal. And the 7.99 ENOB for an 8bit ADC is the best I've seen. thanks!<br /><br />My beef is the suggestion that a10b ADC could have an ENOB that is bearly 12bits, which is what was suggested by the original poster... and hence could provide a shot noise limited detection capability for a 2Me- full well.<br /><br />All good.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-61362635718104200802015-12-01T22:17:23.392+02:002015-12-01T22:17:23.392+02:00Well, not all are that bad. For instance, look at ...Well, not all are that bad. For instance, look at Intersil ADCs. Performance of some of them is quite close to an ideal one:<br /><br />ISLA118P50: 8b physically, 7.99 ENOB - close to the ideal, right? And this is in mass production.<br /><br />http://www.intersil.com/en/products/data-converters/high-speed-a-d-converters/a-d-converters/ISLA118P50.htmlVladimir Koifmanhttps://www.blogger.com/profile/01800020176563544699noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-41667537650628731142015-12-01T21:39:10.386+02:002015-12-01T21:39:10.386+02:00correction
... noise that is > 0,5LSBcorrection<br /><br />... noise that is > 0,5LSBAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-78608085721715847432015-12-01T20:28:03.272+02:002015-12-01T20:28:03.272+02:00I'm yet to meet a single ADC that has a SNR gr...I'm yet to meet a single ADC that has a SNR greater than the number of LSBs it can represent. Most have a quantization noise that is < 0.5LSB and most provide much worse performance, especially on-chip devices.<br /><br />I think you should bring this ADC wonder to market ASAP! I'll be the 1st in line to buy it!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-1020321343905140432015-12-01T13:51:13.015+02:002015-12-01T13:51:13.015+02:00signal is 1024 LSBs, noise is 1LSB/sqrt(12), signa...signal is 1024 LSBs, noise is 1LSB/sqrt(12), signal to noise is 1024 /(1/sqrt(12))=3550! CLEAR????Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-76537854320640223072015-12-01T12:25:38.688+02:002015-12-01T12:25:38.688+02:00hi, not sure you did the arithmetic.
snr of ADC i...hi, not sure you did the arithmetic.<br /><br />snr of ADC is 1024/sqrt(12)=295.6 while sqrt(2M)=1414.<br /><br />Pretty sure that the 10B ADC cannot provide shot noise limited detection.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-13663697966868954062015-12-01T12:14:01.628+02:002015-12-01T12:14:01.628+02:00Maybe because it is not a Pinned Diode ? Maybe because it is not a Pinned Diode ? Unknownhttps://www.blogger.com/profile/00061406865121843176noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-25862206348205695072015-12-01T10:02:30.724+02:002015-12-01T10:02:30.724+02:00why not? SNR_ADC (=2^10/sqrt(12)) > SNR_pixel (...why not? SNR_ADC (=2^10/sqrt(12)) > SNR_pixel (=sqrt(2M))Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-56670383579107121752015-12-01T08:19:07.800+02:002015-12-01T08:19:07.800+02:002 Me/pixel sounds hyperbolic! How does one ever re...2 Me/pixel sounds hyperbolic! How does one ever reset this photodiode? For reasonable voltages available on the chip it is impossible to fully deplete this PD. And too high voltage triggers other leakage mechanisms! Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-46481308139071632812015-11-30T15:50:40.942+02:002015-11-30T15:50:40.942+02:0010-bit ADC cannot assure shot-noise-limited applic...10-bit ADC cannot assure shot-noise-limited applications. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-66698140026533281702015-11-30T15:44:19.781+02:002015-11-30T15:44:19.781+02:00Looks like good news for shot-noise-limited applic...Looks like good news for shot-noise-limited applications where sufficient light can be made available - of which there are quite a few.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-14255305759495407102015-11-30T14:36:45.942+02:002015-11-30T14:36:45.942+02:00Is this from one of IISW 2015 papers? Which is 70...Is this from one of IISW 2015 papers? Which is 700fps, 2Me- and1400*1400.Peng https://www.blogger.com/profile/00705996390938928627noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-9027938074592100062015-11-30T14:06:59.195+02:002015-11-30T14:06:59.195+02:00It's a simple 3T pixel.It's a simple 3T pixel.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-77343119731089579802015-11-30T11:56:32.751+02:002015-11-30T11:56:32.751+02:00May I know the power consumption? That will say a ...May I know the power consumption? That will say a lot!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-24025426676281289882015-11-30T11:55:31.338+02:002015-11-30T11:55:31.338+02:00Why not? In 12um pitch, you can put 200-300fF of c...Why not? In 12um pitch, you can put 200-300fF of cap equivalent to 2-3Me- FWC. They might not be integrating on SFD node.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-47224644474344988732015-11-30T11:22:28.454+02:002015-11-30T11:22:28.454+02:00FWC of 2 Me-/pixel? really?FWC of 2 Me-/pixel? really?Anonymousnoreply@blogger.com