Single sideband double quadrature modulator
US5861781A · kind A · utility
15Cited by
2References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/403
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of and apparatus for effecting single sideband modulation which mixes and sums the quadrature and in-phase components of a baseband signal with the in-phase and quadrature components of an intermediate frequency (IF) signal to form in-phase and quadrature components of a sum signal having a frequency equal to the sum of the frequencies of the baseband and intermediate frequency signals and which mixes and sums the quadrature and in-phase components of an RF carrier signal with the in-phase and quadrature components of the sum signal to form a single-sideband signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.