Method for determining DC level of AC signal and DC offset of the same
US6992954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2002 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Aug 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10203
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for determining a direct current (DC) level involved in an alternating current signal is provided. The alternating current signal is transmitted from an amplifier to an A/D (analog-to-digital) converter. When any of the extreme values of the alternating current signal is beyond the input range of the A/D converter, the alternating current signal is shifted to make both of the peak and bottom values located within the input range of the A/D converter. Then, the real extreme values are realized according to the shift level(s), the relative peak and bottom values realized after the shifting procedure, and the input range of the A/D converter. Finally, the DC level is determined according to the real peak and bottom values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.