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:
Sep. 21, 2010
Filed:
Apr. 28, 2009
Shuenn-yuh Lee, Minxiong Shiang, TW;
Rong-guey Chang, Minsyong Township, Chiayi County, TW;
Chih-yuan Chen, Kaohsiung, TW;
Jia-hua Hong, Keelung, TW;
Shuenn-Yuh Lee, Minxiong Shiang, TW;
Rong-Guey Chang, Minsyong Township, Chiayi County, TW;
Chih-Yuan Chen, Kaohsiung, TW;
Jia-Hua Hong, Keelung, TW;
National Chung Cheng University, Chia-Yi, TW;
Abstract
The present invention discloses a sigma-delta modulator architecture capable of automatically improving dynamic range and a method for the same. Based on the concept that different dynamic ranges of a sigma-delta modulator can be obtained via adjusting the signal power gain thereof, the present invention provides a novel algorithm to implement an automation program. The present invention finds out several sets of dynamic-range curves to improve the overall dynamic range. Via a high-level sigma-delta modulator architecture, the present invention can calculate the required feedforward coefficients. Further, the present invention install in the sigma-delta modulator architecture with four additional components, including a peak detection unit, a comparator unit, a digital coefficient control unit and a switch unit, to dynamically detect the output of the sigma-delta modulator and dynamically modify the feedforward coefficient of the sigma-delta modulator. Thus is extended the dynamic range of the sigma-delta modulator.