Passive amplification circuit and analog-digital convertor
US9054726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2014 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jan 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/44
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential signal is amplified by passive amplification which does not a reference of a common-mode voltage. At this time, the voltage of the differential signal is passive-amplified twice before carrying out a successive approximation type analog-digital conversion operation. The passive amplification is attained by providing a plurality of capacitances which carry out a sampling operation, and switching these connection relation by using switches. Without being accompanied by the increase of the consumed power and the chip size, an influence by the noise of s comparator is reduced to a half so that the effective resolution can be increased for one bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.