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:
May. 05, 2009
Filed:
Feb. 08, 2007
Applicants:
Bertan Bakkaloglu, Scottsdale, AZ (US);
Sayfe Kiaei, Fountain Hills, AZ (US);
Shahin Taleie, San Diego, CA (US);
Inventors:
Bertan Bakkaloglu, Scottsdale, AZ (US);
Sayfe Kiaei, Fountain Hills, AZ (US);
Shahin Taleie, San Diego, CA (US);
Assignee:
Arizona Board of Regents, Tempe, AZ (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A noise-shaped direct digital IF to RF DAC (DIF2RF) with embedded up-converter mixer is presented. The digital IF signal is noised shaped by a band-pass ΣΔ modulator with a single bit IF output followed by a semi-digital current-mode IF filter to attenuate out-of-band quantization noise. A current steering DAC combines scaled values of local oscillator (LO) signals as current sources for performing current steering and upconversion in a single cell.