System providing a switched output signal and a high resolution output signal
AssigneeInfineon Technologies AG
InventorsMario Motz, Udo Ausserlechner, Bernhard Schaffer
Life of this patent
Estimating the term…
Abstract
A system including a sensing system, a first chopped circuit, a second chopped circuit, and a clock generator. The sensing system is configured to provide sensed input signals. The first chopped circuit is configured to provide a switched output signal that switches in response to values of the sensed input signals crossing a limit. The second chopped circuit is configured to provide a high resolution output signal that corresponds to the sensed input signals and has a higher resolution than the switched output signal. The clock generator is configured to provide clock signals that synchronize chopping of the first chopped circuit and the second chopped circuit.
Claims22
A system, comprising:
- a sensing system configured to provide sensed input signals;
- a first chopped circuit configured to provide a switched output signal that switches in response to values of the sensed input signals crossing a limit;
- a second chopped circuit configured to provide a high resolution output signal that corresponds to the sensed input signals and has a higher resolution than the switched output signal;
- and
- a clock generator configured to provide clock signals that synchronize chopping of the first chopped circuit and the second chopped circuit.
An integrated circuit, comprising:
- a magnetic sensing system configured to provide sensed input signals;
- a chopped auto-zeroing comparator configured to receive the sensed input signals and switch a switched output signal in response to values of the sensed input signals crossing a limit;
- a circuit configured to receive the sensed input signals and provide a high resolution output signal that corresponds to the sensed input signals and has a higher resolution than the switched output signal;
- and
- a clock generator system configured to provide clock signals that synchronize the magnetic sensing system and chopping of the chopped auto-zeroing comparator and auto-zeroing of the chopped auto-zeroing comparator.
A method, comprising:
- providing sensed input signals;
- outputting a switched output signal via a first chopped circuit, wherein the switched output signal switches in response to values of the sensed input signals crossing a limit;
- outputting a high resolution output signal via a second chopped circuit, wherein the high resolution output signal corresponds to the sensed input signals and has a higher resolution than the switched output signal;
- and
- synchronizing clocking of the first chopped circuit and the second chopped circuit.
A method, comprising:
- sensing a current magnetically to provide sensed input signals;
- receiving the sensed input signals at a chopped auto-zeroing comparator;
- switching a switched output signal from the auto-zeroing comparator in response to values of the sensed input signals crossing a limit that is one of a constant limit and a slope limit;
- receiving the sensed input signals at a circuit;
- outputting a high resolution output signal from the circuit, which corresponds to the sensed input signals and has a higher resolution than the switched output signal;
- and
- synchronizing the sensing of the current magnetically, chopping of the chopped auto-zeroing comparator, and auto-zeroing of the chopped auto-zeroing comparator.
Dependencies are inferred from the claim text.