Coded data generation or conversion – Converter calibration or testing
Reexamination Certificate
2007-01-10
2008-10-28
Nguyen, Khai M (Department: 2819)
Coded data generation or conversion
Converter calibration or testing
C341S118000, C341S144000, C341S145000
Reexamination Certificate
active
07443323
ABSTRACT:
Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.
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Braswell Brandt
Gan Jiangbo
Gomez Michael L.
Miaille Gerald P.
Razmyslovitch Boris V.
Bethards Charles W.
Freescale Semiconductor Inc.
Nguyen Khai M
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