Charge-coupled device floating diffusion output reset
US4974240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1990 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Apr 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D44/454
Abstract
A charge-coupled device including a semiconductor substrate of given conductivity type, a buried channel formed on the substrate of different conductivity type than the substrate, an electrically floating diffusion formed in the substrate of different conductivity type than the substrate, and a plurality of electrodes insulating from the buried channel. The electrodes are responsive to applied voltages for supplying a signal charge through the buried channel to the floating diffusion. The charged-coupled device also includes a transistor responsive to a pulse voltage signal for periodically resetting the floating diffusion to a predetermined potential. The transistor comprises an enhancement type surface channel field effect transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.