Method and apparatus for double-sampling a signal
US6563348B1 · kind B1 · utility
6Cited by
2References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45574
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and apparatuses for double-sampling a signal using an operational amplifier having dedicated unswitched connections to sample and hold circuits. In one embodiment, a circuit according to the teachings of the present invention includes an op-amp having four input terminals. Two of the input terminals are tied to ground and the other two terminals are coupled to S/H circuits through unswitched connections. In one embodiment, the S/H circuits are coupled to sample an input signal during different clock phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.