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:
Jul. 16, 2019
Filed:
Nov. 28, 2018
Guzik Technical Enterprises, Mountain View, CA (US);
Anatoli B. Stein, Atherton, CA (US);
Semen P. Volfbeyn, Palo Alto, CA (US);
Alexander Taratorin, Palo Alto, CA (US);
Valeriy Serebryanskiy, Santa Clara, CA (US);
Guzik Technical Enterprises, Mountain View, CA (US);
Abstract
A method and system for calibrating a time-interleaved digital to analog converter (DAC) provides equalization of frequency response misalignments in sub-DACs forming the DAC. In a calibration mode, test signals are applied to an DAC and output amplitudes and phases of are measured. From the measured values, complex values of the gains of the respective sub-DACs. h(F) are determined and a specified target frequency response T(F) for a tandem connection equalizer-DAC is determined. For each of a plurality of test frequencies, complex values of equalizer gains Eqare determined from Eq(F)=T(F)/h(F), to form equalizing frequency responses. Sets of equalizing coefficients C(p) pursuant to discrete Fourier transforms on Eq(F). In an operation mode, a digital input signal is transformed input into an equalized digital signal E(n) through use of the sets of equalizing coefficients C(p).