Calibration of interpolating string digital-to-analog converters
US-9621177-B1 · Apr 11, 2017 · US
Calibration of interpolating string digital-to-analog converters
US9813074B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9813074-B2 |
| Application number | US-201715470274-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 27, 2017 |
| Priority date | Dec 8, 2015 |
| Publication date | Nov 7, 2017 |
| Grant date | Nov 7, 2017 |
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Abstract
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Methods, apparatus and articles of manufacture (e.g., physical storage media) to calibrate interpolating string digital-to-analog converters are disclosed. Example methods disclosed herein to calibrate a digital-to-analog converter (DAC) include determining a first calibration codeword based on a first nonlinearity error value measured at an output of the DAC when a most-significant-bit (MSB) portion of an input codeword is applied to an input of the DAC. Such disclosed example methods also include determining a second calibration codeword based on a second measured nonlinearity error value measured at the output of the DAC when a least-significant-bit (LSB) portion of the input codeword is applied to the input of the DAC. Such disclosed example methods further include combining the first calibration codeword and the second calibration codeword to determine a third calibration codeword to be accessed by the DAC to calibrate the output of the DAC when the input codeword is applied to the DAC.
First claim
Opening claim text (preview).
What is claimed is: 1. A digital-to-analog converter (DAC) calibrator comprising: a first codeword calibrator to determine a first calibration codeword based on a first nonlinearity error value measured at an output of a DAC when a most-significant-bit (MSB) portion of an input codeword is applied to an input of the DAC; a second codeword calibrator to determine a second calibration codeword based on a second measured nonlinearity error value measured at the output of the DAC when a least-significant-bit (LSB) portion of the input codeword is applied to the input of the DAC; and a calibration codeword combiner to combine the first calibration codeword and the second calibration codeword to determine a third calibration codeword to be accessed by the DAC to calibrate the output of the DAC when the input codeword is applied to the DAC. 2. A DAC calibrator as defined in claim 1 , wherein the calibration codeword combiner is to determine the third calibration codeword by adding the first calibration codeword and the second calibration codeword to determine the third calibration codeword.
Assignees
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Classifications
Analogue/digital converters ({H03M1/001 – } H03M1/10 take precedence) · CPC title
with equal currents which are switched by unary decoded digital signals · CPC title
Analogue/digital conversion; Digital/analogue conversion (conversion of analogue values to or from differential modulation H03M3/00) · CPC title
Digital/analogue converters ({H03M1/001 – } H03M1/10 take precedence) · CPC title
- H03M1/1033Primary
over the full range of the converter, e.g. for correcting differential non-linearity · CPC title
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- What does patent US9813074B2 cover?
- Methods, apparatus and articles of manufacture (e.g., physical storage media) to calibrate interpolating string digital-to-analog converters are disclosed. Example methods disclosed herein to calibrate a digital-to-analog converter (DAC) include determining a first calibration codeword based on a first nonlinearity error value measured at an output of the DAC when a most-significant-bit (MSB) p…
- Who is the assignee on this patent?
- Texas Instruments Inc
- What technology area does this patent fall under?
- Primary CPC classification H03M1/1033. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 07 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).