Method and apparatus for the compensation of dynamic error signals of a chopped hall sensor
AssigneeInfineon Technologies AG
InventorMario Motz
Life of this patent
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Abstract
A method for compensation of dynamic error signals of a chopped Hall sensor that comprises at least one Hall sensor element comprising a plurality of terminal pairs for impressing an excitation current through the Hall sensor element and for taking a Hall voltage. The terminal pairs for impressing the excitation current and for taking the Hall voltage are switched in a first and/or second rotational sense. In order to compensate dynamic error signals caused by the switching, the Hall voltages taken at the terminal pairs when switching in the first rotational sense are supplied to a summation and/or averaging analysis unit together with the Hall voltages taken at the terminal pairs when switching in the second rotational sense.
Claims16
A method for compensation of dynamic error signals of a chopped Hall sensor that comprises at least one Hall sensor element having a plurality of terminal pairs for impressing an excitation current through the Hall sensor element and for taking a Hall voltage, comprising the steps of:
- switching the terminal pairs for impressing the excitation current and for taking the Hall voltage in one of at least a first and a second rotational sense;
- and
- supplying the Hall voltages taken at the terminal pairs when switching in the first rotational sense to an analysis unit for one of at least a summation and averaging together with the Hall voltages taken at the terminal pairs when switching in the second rotational sense in order to compensate dynamic error signals caused by the switching.
An apparatus for compensation of dynamic error signals of a chopped Hall sensor, comprising:
- at least one Hall sensor element comprising a plurality of terminal pairs for impressing an excitation current through the Hall sensor element and for taking a Hall voltage;
- the terminal pairs for impressing the excitation current and for taking the Hall voltage are switchable in one of at least a first and second rotational sense;
- and
- an analysis unit for at least one of summation and averaging of the Hall voltages taken at the terminal pairs when switching in the first rotational sense with the Hall voltages taken at the terminal pairs when switching in the second rotational sense in order to compensate dynamic error signals caused by the switching.
A method for compensation of dynamic error signals of a chopped Hall sensor that comprises at least one Hall sensor element having a plurality of terminal pairs for impressing an excitation current through the Hall sensor element and for taking a Hall voltage, comprising the steps of:
- switching the terminal pairs for impressing the excitation current and for taking the Hall voltage in one of at least a first and second rotational sense;
- and
- with the Hall voltages taken at the terminal pairs when switching in the first rotational sense performing one of at least a summation and averaging together with the Hall voltages taken at the terminal pairs when switching in the second rotational sense in order to compensate dynamic error signals caused by the switching.
Dependencies are inferred from the claim text.