Apparatus and method for the characterization of analog-to-digital converters
First Claim
1. A method characterizing an analog-to-digital converter, the analog-to-digital converter configured to convert an input signal to a digital output signal, the method comprising:
- applying the input signal to the analog-to-digital converter that in a first phase at least includes a profile of a rising exponential function with Euler'"'"'s number as the base, and in a further phase has a profile of a falling exponential function with Euler'"'"'s number as the base;
integrating the digital output signal during the first phase to provide a first sum;
integrating the digital output signal during the further phase to provide a second sum; and
calculating from the first sum and the second sum at least a gain error of the analog-to-digital converter and/or a zero-point error of the analog-to-digital converter.
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Abstract
A method and apparatus for characterizing an A/D converter are provided. The A/D converter is configured to convert an input signal into a digital output signal. The method and apparatus may provide: applying an input signal to the A/D converter that in a first phase at least includes a gradient of a rising exponential function with Euler'"'"'s number as the base, and in a further phase has a profile of a falling exponential function with Euler'"'"'s number as the base, integrating a digital output signal associated with the A/D converter during the first phase to provide a first sum, integrating the digital output signal associated with the A/D converter during the further phase to provide a second sum, and calculating from the first sum and the second sum at least a gain error of the A/D converter and/or a zero point error of the A/D converter.
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Citations
17 Claims
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1. A method characterizing an analog-to-digital converter, the analog-to-digital converter configured to convert an input signal to a digital output signal, the method comprising:
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applying the input signal to the analog-to-digital converter that in a first phase at least includes a profile of a rising exponential function with Euler'"'"'s number as the base, and in a further phase has a profile of a falling exponential function with Euler'"'"'s number as the base; integrating the digital output signal during the first phase to provide a first sum; integrating the digital output signal during the further phase to provide a second sum; and calculating from the first sum and the second sum at least a gain error of the analog-to-digital converter and/or a zero-point error of the analog-to-digital converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electrical circuit for characterizing an analog-to-digital converter, the analog-to-digital converter configured to convert an input signal to a digital output signal, the electrical circuit comprising:
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a generator to provide the input signal, the input signal in a first phase at least includes a profile of a rising exponential function with Euler'"'"'s number as the base, and in a further phase has a profile of a falling exponential function with Euler'"'"'s number as the base an integrator to integrate the digital output signal during the first phase 2 provide a first sum and to integrate the digital output signal during the further phase to provide a second sum; a calculation unit to calculate from the first sum and the second sum at least a gain error of the analog-to-digital converter and/or a zero-point error of the analog-to-digital converter. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification