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:
Nov. 17, 2015
Filed:
Apr. 26, 2015
Zhiling Sui, Suzhou, CN;
Zhijun Chen, Suzhou, CN;
Zhihong Cheng, Suzhou, CN;
Yanping Zhang, Suzhou, CN;
Zhiling Sui, Suzhou, CN;
Zhijun Chen, Suzhou, CN;
Zhihong Cheng, Suzhou, CN;
Yanping Zhang, Suzhou, CN;
FREESCALE SEMICONDUCTOR, INC., Austin, TX (US);
Abstract
A pipelined analog-to-digital converter (ADC) that converts an analog input voltage signal Vinto a digital output value D. The ADC has a sequence of stages including a first calibrated stage having: (1) an ADC sub-module that receives Vand provides an ADC sub-module digital output value based on V, (2) a DAC sub-module that receives the ADC sub-module digital output value and outputs a corresponding analog voltage signal V, (3) a first difference module that generates an analog residual-voltage signal based on a difference between Vand V, and (4) an artificial-noise-insertion module that inserts an analog artificial-noise voltage signal into the residual voltage signal to generate an analog combined voltage signal. The analog combined voltage signal is used to calibrate the first calibrated stage. The artificial-noise-insertion module generates the polarity of the artificial-noise voltage signal based on the polarity of the corresponding residual voltage signal.