Charge amplifier for MOS imaging array and method of making same
US5724095A · kind A · utility
8Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1995 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Oct 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A charge amplifier with DC offset cancelling for use in a pixel element of an MOS image sensor is disclosed. The charge amplifier can be manufactured using a standard CMOS single polycrystalline process, making it much more cost effective than prior art designs. The charge amplifier includes an operational amplifier, a source capacitor, a series capacitor, and a feedback capacitor. The source capacitor holds the input signal. The output of the operational amplifier provides the output signal. Switches control the routing of the signal flow from the source capacitor, the series capacitor, and the feedback capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.