DC offset calibration system and method
US11218232B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2021 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Mar 22, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1615
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A DC offset calibration system and method. The method includes: in a first calibration mode, outputting a first digital signal by using a control circuit, generating a first differential calibration signal according to the first digital signal by using a first digital-to-analog conversion circuit, generating a first amplified signal according to the first differential calibration signal by using an amplification circuit, and feeding back the first amplified signal to the control circuit to adjust the first digital signal; and in a second calibration mode, outputting a second digital signal by using the control circuit, generating a second differential calibration signal according to the second digital signal by using a second digital-to-analog conversion circuit, generating a second amplified signal according to the second digital signal by using an equalizing circuit and the amplification circuit, and feeding back the second amplified signal to the control circuit to adjust the second digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.