Output circuit for image sensor
US5192990A · kind A · utility
46Cited by
2References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1991 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Jun 17, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D44/454
Abstract
An output circuit for sequentially receiving and converting charge collected in the photoelements of an image sensor and converting such charge into an output voltage. The output circuit includes a buried-channel LDD transistor having gate, source and drain electrodes. The source electrode provides a floating diffusion. When the transistor is turned off, a potential well is provided in the floating diffusion which collects charge. An output source-follower amplifier also employing buried-channel LDD transistors is connected to the floating diffusion and produces the output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.