The history of CCD and CMOS image sensors. - Page 1
Forum section: electronics / general

author: BrianHG
author_rank: Super Contributor
timestamp: March 24, 2023, 12:34:08 am
content: Enjoy:

author: jonpaul
author_rank: Super Contributor
timestamp: March 24, 2023, 12:42:11 am
content: charge coupled devicesMN3001 Mitsubishi Panasonic bucket brigade delay 19711976 CCD Signal processing1980 line scanner CCDJ

author: BrianHG
author_rank: Super Contributor
timestamp: March 25, 2023, 04:00:04 am
content: Quote from: jonpaul on March 24, 2023, 12:42:11 amWhat about the rest of the history?

author: jonpaul
author_rank: Super Contributor
timestamp: March 25, 2023, 04:39:46 am
content: Reticon CCDs circa 1977..1982CCD book, seminar 1977Used 1024 long analogique CCD BBD delay MN3001 in my Eventide Instant FlangerMore to follow,jon

author: tooki
author_rank: Super Contributor
timestamp: March 25, 2023, 01:36:00 pm
content: Quote from: BrianHG on March 24, 2023, 12:34:08 am(Writing this before watching)Oh boy, Asianometry… let’s see what he gets wrong this time! (While that guy’s enthusiasm and productivity is great, the quality of his research is often lacking. I don’t think I’ve seen a single video of his that didn’t have some glaring error or an omission of something that would have disproven his claim.)

author: jonpaul
author_rank: Super Contributor
timestamp: March 25, 2023, 02:01:39 pm
content: CCD and CCD imaging was an American invention!George Smith and Willard Boyle, invented the CCD at Bell Telephone l Laboratories NJ, 1969 —Awarded the 2009 Nobel Prize in Physics,CCD was developed for imaging by Michael F. Tompsett, at Bell Labs, in the 1970s.https://www.bell-labs.com/about/history/innovation-stories/charge-coupled-device/Jon

author: tooki
author_rank: Super Contributor
timestamp: March 25, 2023, 02:19:16 pm
content: Quote from: tooki on March 25, 2023, 01:36:00 pmSo…- confused photoelectric and photovoltaic effects- confounded CCD memory and bubble memory- mixed up camera shutter and iris- claimed the CCD’s power consumption was why early camcorders had short battery runtime

author: NiHaoMike
author_rank: Super Contributor
timestamp: March 26, 2023, 03:34:24 pm
content: Quote from: tooki on March 25, 2023, 02:19:16 pmBack when camcorders used tubes, I'm sure the first CCD camcorder would be marketed as having very good battery life.

author: tooki
author_rank: Super Contributor
timestamp: March 26, 2023, 06:54:55 pm
content: Quote from: NiHaoMike on March 26, 2023, 03:34:24 pmProbably. But I kinda suspect thatall the other stuffinvolved in an early camcorder — a CRT viewfinder, a tape transport, etc. — and the limitations of pre-lithium rechargeable batteries would probably end up being the deciding factor, not the sensor type!

author: mawyatt
author_rank: Super Contributor
timestamp: March 27, 2023, 07:39:07 pm
content: We used CCDs for Sine & Cosine Convolvers as part of the Chirped Z Transform based portable handheld Real Time SA developed back ~80. Back then we had a custom CCD process, and these custom CCDs had very large clock capacitances (recall 4 clocks, 2 had large C and 2 had moderate C). These clocks needed to swing >15VPP at a high rate which would produce a very large chip clock driver power dissipation and might be why the early CCD imaging chip based cameras consumed high power (during readout).Anyway, we developed a clocking scheme called "Reactive Clocking" which exchanged the capacitive clock energy stored in the chip clock capacitance with the power supply, similar to a boost regulator, which saved ~95% of the power of a conventional clock driver (we should have patented this but didn't, and ~ decade later NASA did, altho for a different application!!). Without the Reactive Clock our handheld SA would require a couple deep discharge DieHard Lead Acid Truck batteriesBest,