Method and apparatus for current and temperature measurement in an electronic power circuit
AssigneeInfineon Technologies AG
InventorsReinhold Bayerer, Markus Thoben
Life of this patent
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Abstract
A current/temperature measurement method using parasitic components in an electronic power circuit is disclosed. The measured values derived from these parasitic components with inadequate precision are first of all compensated for, in terms of their current/temperature or voltage dependence, during the production process. The evaluation which takes place during operation involves compensating for the temperature or current dependence of the sensor components using two measurements which are linearly independent of one another and appropriate arithmetic operations in an evaluation unit.
Claims25
A method for current/temperature measurement in an electronic power circuit, comprising:
- using a first sensor component and at least one second sensor component in the electronic power circuit to detect a first current/temperature value or a first measured variable which is distinctly dependent thereon and at least one second current/temperature value or a second measured variable which is distinctly dependent thereon;
- and
- choosing the first and the at least one second sensor component such that their voltage/current temperature characteristics are linearly independent of one another and at least one of the sensor components is a parasitic component of the electronic power circuit, wherein the variable measured using the first sensor component is calibrated on the basis of the measurement using the at least one second sensor component at least two different temperatures and different current values using a calibration process which takes place in an evaluation unit during the production process for the electronic power circuit, and an evaluation algorithm evaluates the measured values detected using the first sensor component during operation of the electronic power circuit in progress using parameters ascertained during the calibration process for compensating for the temperature and/or current dependence of the present measured values.
A measurement apparatus for current/temperature measurement in an electronic power circuit comprising:
- a first sensor component;
- and
- at least one second sensor component having voltage/current temperature characteristics which are linearly independent of the first sensor component, where the first sensor component or at least one sensor component is a parasitic component of the electronic power circuit and used to detect a first current/temperature value or a first measured variable which is distinctly dependent thereon and at least one second current/temperature value or a second measured variable which is distinctly dependent thereon.
A measurement apparatus for current/temperature measurement in an electronic power circuit comprising:
- a first sensor component;
- and
- at least one second sensor component having voltage/current temperature characteristics which are linearly independent of the first sensor component, where the first sensor component or at least one sensor component is a parasitic component of the electronic power circuit and used to detect a first current/temperature value or a first measured variable which is distinctly dependent thereon and at least one second current/temperature value or a second measured variable which is distinctly dependent thereon.
A measurement apparatus for current/temperature measurement in an electronic power circuit comprising:
- a first sensor component;
- and
- at least one second sensor component having voltage/current temperature characteristics which are linearly independent of the first sensor component, where the first sensor component or at least one sensor component is a parasitic component of the electronic power circuit and used to detect a first current/temperature value or a first measured variable which is distinctly dependent thereon and at least one second current/temperature value or a second measured variable which is distinctly dependent thereon.
A method for measuring a characteristic of an electronic power circuit comprising:
- using a parasitic component of the electronic power circuit as a first sensor component or at least one second sensor component;
- detecting a first measured variable and a second measured variable;
- and
- compensating the first sensor component or the at least one second sensor component using the first measured variable or the second measured variable.
Dependencies are inferred from the claim text.