Multi-level mixer architecture for direct conversion of FSK signals
US6018553A · kind A · utility
119Cited by
11References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multi-level quadrature (I/Q) mixer for use in a communication system such as a paging device, where the mixer includes first and second I/Q downconversions followed by demodulation. The first I/Q downconversion converts an I/Q signal pair to a first IF, and the second I/Q downconversion converts an I/Q signal pair to a second IF. The first IF may or may not be the center frequency depending on the number of subchannels in the single channel being downconverted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.