Comparator and analog-to-digital
US8446178B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2011 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Dec 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45644
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A comparator includes: a pre-amplification module, configured to generate two amplified differential signal reference currents according to an input voltage and a reference voltage; and a differential signal obtaining module, configured to obtain a differential signal according to the two amplified differential signal reference currents. The pre-amplification module includes a differential unit, an offset unit, and an amplification unit, where the differential unit is configured to generate two direct current bias currents according to the input voltage and the reference voltage; the offset unit is configured to generate an offset current of the two direct current bias currents according to the input voltage and the reference voltage, so as to reduce magnitude of the two direct current bias currents and obtain two differential signal reference currents; the amplification unit is configured to receive the two differential signal reference currents, and amplify the two differential signal reference currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.