Digital-to-analog converter comprising an integrated test circuit
First Claim
1. A digital-to-analog converter including an integrated test circuit, a digital input and an analog output, characterized in that a comparator (5) capable of being connected with the analog output (4) and comprising a connection (7) for a reference voltage source, a digital test connection (11) and a logic element is provided, said logic element being connected with the test connection (11) for emitting the digital value 0 or 1 as a function of the difference between the voltage at the analog output (4) and the reference voltage.
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Abstract
In a digital-to-analog converter including an integrated test circuit, a digital input and an analog output, a comparator (5) capable of being connected with the analog output (4) and including a connection (7) for a reference voltage source, a digital test connection (11) and a logic element is provided, the logic element being connected with the test connection (11) for emitting the digital value 0 or 1 as a function of the difference between the voltage at the analog output (4) and the reference voltage.
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Citations
6 Claims
- 1. A digital-to-analog converter including an integrated test circuit, a digital input and an analog output, characterized in that a comparator (5) capable of being connected with the analog output (4) and comprising a connection (7) for a reference voltage source, a digital test connection (11) and a logic element is provided, said logic element being connected with the test connection (11) for emitting the digital value 0 or 1 as a function of the difference between the voltage at the analog output (4) and the reference voltage.
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6. A method for determining the transient period of a digital-to-analog converter, characterized by the steps of:
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applying to the input of the digital-to-analog converter a digital word corresponding to a stored analog target value, comparing the analog signal at the output of the digital-to-analog converter with the stored analog target value, generating a digitally evaluatable signal as soon as the difference between the analog signal at the output of the digital-to-analog converter and the stored analog target value has become smaller than the transient tolerance, measuring the time between the application of the digital word to the input of the digital-to-analog converter and the generation of the digitally evaluatable signal.
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Specification