Comparator circuit, related method of comparing a vector to comparison boundaries and transmitter employing the same
US7345531B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 2003 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Mar 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a comparator circuit for use with in-phase and quadrature phase signals and a method of comparing a resultant vector of the in-phase and quadrature phase signals. In one embodiment, the comparator circuit includes a non-titled comparison circuit that compares a resultant vector of the in-phase and quadrature phase signals to vertical and horizontal comparison boundary member pairs. The comparator circuit also includes a tilted comparison circuit, coupled to the non-tilted comparison circuit, that compares the resultant vector to comparison boundary member diagonals coupled to the vertical and horizontal comparison boundary member pairs. The comparator circuit may still further include a combiner circuit that provides a comparison signal based on signals from the non-tilted and tilted comparison circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.