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:
Apr. 16, 2002
Filed:
Dec. 18, 2000
Eric G. Soenen, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A pipelined analog-to-digital converter system ( ) is responsive to an analog input signal ( ). The system includes four pipeline stages ( ), which each produce a respective digital output ( ) that is coupled to a combining circuit ( ). The combining circuit generates the digital output ( ) of the system. Each pipeline stage includes an analog-to-digital converter ( ), which generates the digital output for that stage. A shuffler circuit ( ) randomly shuffles the bits of this digital output, in order to generate shuffled switching signals, which in turn are used to control electronic switches ( ) associated with several capacitors (C1-C4). By randomly shuffling the switching signals, the effects caused by variation of any capacitor from an ideal value are randomized. This avoids nonlinearity such as harmonic distortion in the analog output signal ( ) from that stage.