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:
Jan. 18, 2005
Filed:
Feb. 03, 2003
Steven M. Mollenkopf, San Diego, CA (US);
Puay Hoe Andrew See, San Deigo, CA (US);
Brett C. Walker, San Diego, CA (US);
Steven M. Mollenkopf, San Diego, CA (US);
Puay Hoe Andrew See, San Deigo, CA (US);
Brett C. Walker, San Diego, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
A transmitterconverts a digital baseband signal inputfor transmission by an antennato support multiple communication standards. An over-deviation phase multiplierincreases signal phase deviation by a factor of M. A digital phase modulatorapplies trigonometric lookup tables. A digital intermediate frequency up-converterup-shifts frequencies of desired signal content. First and second digital-to-analog converters (DACs)anduse relatively low-bit operations, which add DAC noise. First and second low pass filtersandapply rejection above frequencies of desired signal content. An analog I/Q modulatorconverts from complex to real signals, adding an unwanted signal spaced from the desired signal content by an intermediate frequency multiple. A limiterreduces amplitude modulated noise. An over-deviation phase dividerdivides signal phase deviation by 1/M to reduce phase modulated noise.