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:
Jul. 01, 2003
Filed:
Aug. 26, 1999
Applicant:
Inventor:
Duane L. Abbey, Cedar Rapids, IA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 3/00 ; H03M 1/66 ; H03M 1/12 ;
U.S. Cl.
CPC ...
H03M 3/00 ; H03M 1/66 ; H03M 1/12 ;
Abstract
Multi-bit, monotonic quantizer and linearized delta-sigma modulator based analog-to-digital converter (ADC) modulators and digital-to-analog converter (DAC) modulators are disclosed. A folded monotonic quantizer provides tri-state to bi-state mapping such that three state bits may be utilized but are not required to be transported and stored. The multi-bit ADC and DAC modulators provide linearized, spurious free outputs that require less power and utilize lower oversampling ratios to provide wider bandwidths at high-performance, spurious-free dynamic ranges, making them ideally suitable for use in direct sampling receivers and direct digital transmitters.