Direct digital synthesizer/direct analog synthesizer hybrid frequency synthesizer
US5128623A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Sep 10, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06J1/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital/analog hybrid frequency synthesizer having a digital frequency synthesizer for digitally generating an analog output signal of a predetermined frequency within a frequency range of f to f+.DELTA.f; an input stage analog frequency synthesizer for, receiving the digital frequency synthesizer output signal and I analog input stage input signals, each input stage input signal separated in frequency from a next one by a frequency increment of .DELTA.f wherein a first one and a last one of the input stage input signals are respectively of a frequency of f.sub.A and f.sub.A +(I-1).DELTA.f, selecting one input stage input signal from the input stage input signals, mixing the selected input stage input signal with the digital frequency synthesizer output signal and providing a resultant input stage output signal; and an output stage analog frequency synthesizer for, receiving the input stage output signal and K analog output stage input signals, each output stage input signal separated in frequency from a next one by a frequency increment of I.DELTA.f wherein a first one and a last one of the output stage input signals are respectively of a frequency of f.sub.N and f.sub.N +(K-1)I…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.