Magnetic field sensor system with a temperature response-compensated output signal and method for the temperature response-compensation of an output signal of a magnetic field sensor system
OwnerRadivoje POPOVIC, Sasa SPASIC +1inventors
InventorsRadivoje POPOVIC, Sasa SPASIC, Thomas KALTENBACHER
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Abstract
A magnetic field sensor system with a temperature response-compensated output signal comprises a magnetic field sensor subsystem for temperature response compensation of an output signal, which preferably comprises two interconnected subsystems, and a method for temperature response.
Claims12
Magnetic field sensor system having a temperature response compensated output signal (Vout), the magnetic field sensor system comprising a magnetic field sensor subsystem (500) comprising interconnected subsystems (400, 1061) for temperature response compensation of the output signal (Vout), wherein
- a first subsystem (400) comprises one or more magnetic field sensors (100) selected from the group consisting of Hall effect sensors or other galvano-magnetic sensors;
- and
- a second subsystem (1061) of the magnetic field sensor subsystem (500) comprising a power source (61) for supplying power to the one or more magnetic field sensors (100);
- wherein the magnetic field sensor system further comprises a low pass filter (1200) and one or more inductive elements (150) electrically connected to the one or more magnetic field sensors (100) of the subsystem (400) directly or via a summer (1720), and for temperature response compensation, the current source (61) supplies the one or more magnetic field sensors (100) with a supply current (In) in such a way that the temperature response of the one or more magnetic field sensors (100) can be compensated by means of the supply current (In) as a function of a current source clock signal (1702a) derived from an oscillator (1703).
Method for temperature response compensation of an output signal (Vout) of a magnetic field sensor system comprising a magnetic field sensor subsystem (500) comprising interconnected subsystems (400, 1061), wherein
- a first subsystem (400) comprises one or more magnetic field sensors (100) selected from the group consisting of Hall effect sensors or other galvano-magnetic sensors;
- and
- a second subsystem (1061) of the magnetic field sensor subsystem (500) comprising a power source (61) for supplying power to the one or more magnetic field sensors (100);
- wherein the magnetic field sensor system further comprises a low-pass filter (1200), and one or more inductive elements (150) electrically connected to this or these magnetic field sensors (100) of the subsystem (400) directly or via a summer (1720),
- wherein the method comprises the steps of:
- determining a supply current (In) as a function of a current source clock signal (1702a) derived from an oscillator (1703), thereby compensating for the temperature behaviour of the one or more magnetic field sensors (100);
- and
- supplying the one or more magnetic field sensors (100) with the determine supply current (Ih) using the current source (61).
Dependencies are inferred from the claim text.