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:
Dec. 22, 2015
Filed:
Mar. 17, 2015
Montage Technology (Shanghai) Co., Ltd., Shanghai, CN;
Xiaomin Si, Shanghai, CN;
MONTAGE TECHNOLOGY (SHANGHAI) CO., LTD., Shanghai, CN;
Abstract
The application disclose a sigma-delta analog-to-digital converter. The converter comprises: a summing stage, configured to receive an input signal and subtract a first feedback signal and a second feedback signal from the input signal to generate a difference signal; a loop filter coupled to an output node of the summing stage, and configured to filter the difference signal; a quantizer coupled to an output node of the loop filter, and configured to quantize the filtered difference signal to generate a quantized signal, and to generate an overload signal according to the filtered difference signal, wherein the overload signal indicates whether the filtered difference signal is overloaded and/or an overload amount of the filtered difference signal; a first digital-to-analog converter coupled to the quantizer to receive the quantized signal, and configured to generate the first feedback signal according to the quantized signal; and a second D/A converter coupled to the quantizer to receive the overload signal, and configured to generate the second feedback signal according to the overload signal.