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. 09, 2000
Filed:
Dec. 19, 1997
Duane L Abbey, Cedar Rapids, IA (US);
Rockwell Science Center, Inc., Thousand Oaks, CA (US);
Abstract
A sigma-delta-sigma modulator for analog-to-digital and digital-to-analog converters is described. The sigma-delta-sigma modulator is amenable to fabrication of high speed LSI and VLSI digital components for fixed and programmable processes for minimizing and eliminating required analog circuitry in a digital radio. The sigma-delta-sigma modulator is utilized in a direct sampling receiver in which the received RF is converted by high resolution analog-to-digital processing and subsequently translated to baseband, filtered and demodulated completely in the digital domain. The modulator is also utilized in a direct digital transmitter in which the baseband modulation is formed, translated to RF, and converted to analog by high resolution digital-to-analog processing completely in the digital domain.