Frequency synthesizer
US5184093A · kind A · utility
32Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1992 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Feb 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/185
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency synthesizer, including a direct digital synthesizer (DDS) for providing wave amplitude data as a standard signal source, and a phase lock loop for comparing a branched synthesizer frequency with the standard signal source at a phase comparator. A frequency converter converts the output frequency of the DDS to a higher frequency and provides the resultant higher frequency to the phase comparator in the phase loop. A small loop dividing ratio is obtained by converting the low frequency of the DDS to a higher frequency. A spurious of the synthesizer output signal is reduced and provides a low power consumption apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.