The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2002
Filed:
Nov. 19, 1999
Applicant:
Inventors:
Amir Shalom, Kadima, IL;
Zohar Kaufman, Rishon Lezion, IL;
Assignee:
Shiron Satellite Communications (1996) Ltd., Petah Tikva, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/24 ;
U.S. Cl.
CPC ...
H03D 3/24 ;
Abstract
A frequency synthesizer includes a direct digital synthesizer (DDS), a digital-to-analog converter for converting the output of the DDS to a DDS output signal, a first bandpass filter for filtering the DDS output signal, a single side band mixer for mixing the filtered DDS output signal with a mixing frequency signal, a divider for dividing the mixer output, a second bandpass filter for filtering the mixer output, and a phase lock loop for turning the filtered mixer output into a signal of the desired frequency. This frequency synthesizer combines the high resolution of a DDS with high bandwidth and low noise.