Demodulation mixing for a near field communications (NFC) device
US8558604B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2010 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Aug 30, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3881
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An in-phase, quadrature phase (IQ) mixer for a near field communications (NFC) device is disclosed that includes a signal provider that provides an in-phase (I) mixing signal and a quadrature phase (Q) mixing signal so that the period of the I mixing signal is equal to a period for the Q mixing signal. A controller is configured to control the signal provider so that the average of the I mixing signal over two periods is minimized and the average of the Q mixing signal over two periods is also minimized. The controller is also configured to control the signal provider so that the average propagation delay for the I mixing signal and the Q mixing signal is minimized individually and relative to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.