Fractional-N synthesizer having modulation spur compensation
US5021754A · kind A · utility
45Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Jul 16, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1976
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A synthesizer circuit with spur compensation utilizes fractional division in the synthesizer loop. The fractional divider includes means for compensating the spurs when the fractional numerator N=0. The synthesizer includes means for selecting a reference divisor R such that a non zero value of fractional numerator is produced and such that the generated spurs fall below the side band noise limits of the synthesizer's voltage controlled oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.