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. 14, 2010
Filed:
Aug. 07, 2008
Ralph G. Oberhuber, Plano, TX (US);
Timothy V. Kalthoff, Tucson, AZ (US);
Ralph G. Oberhuber, Plano, TX (US);
Timothy V. Kalthoff, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Circuits and methods to minimize nonlinearity errors in interpolating circuits are described herein. A disclosed example circuit comprises first and second voltage-current converter circuits, each including a first transistor and a second transistor, each having a first electrode configured to receive a signal generated by a corresponding current source, a first current source providing a signal to the first voltage-converter circuit and comprising a first error correction circuit to minimize integral nonlinearity error in the interpolation circuit by setting a first current through the first current source to operate the first voltage-converter circuit in a nominal linear operating mode, and a second current source providing a signal to the second voltage-converter circuit and comprising a second error correction circuit to minimize integral nonlinearity error in the interpolation circuit by setting a second current through the second current source to operate the second voltage-converter circuit in the nominal linear operating mode.