Pixel readout switched capacitor buffer circuit and method therefor
US6423961B1 · kind B1 · utility
6Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Jan 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel signal amplification circuit (200) receives a signal from a pixel element. A first semiconductor switch (225a) is connected to the pixel element and transfers a reset value of the pixel signal to a first storage capacitor (C1). A second semiconductor switch (235a) is also connected to the pixel element and transfers a sampled pixel signal to a second storage capacitor (C3). A differential voltage amplifier (OP1) generates an amplified signal of the difference between the values stored on the first and second storage capacitors (C1 and C3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.