Patent ID: 9366547
Filing Date: 2016-06-14
CPC Classification: G01D

Claim Text:
1. A sensor arrangement, comprising: a plurality of Hall sensor devices each configured to provide a sensor voltage in response to a magnetic field intensity; a selection unit configured to select a Hall sensor device from the plurality of Hall sensor devices and to forward a selected sensor voltage of the selected Hall sensor device; a transconductance amplifier configured to generate a sensing current when the selection unit forwards the selected sensor voltage of the selected Hall sensor device, the sensing current depending on the forwarded selected sensor voltage; a filter stage having a resistor and a filter capacitor connected in parallel in a switchable manner in response to a first switching signal, the filter stage being designed such that a filtered voltage forms across the filter capacitor depending on the sensing current; a capacitive analog-to-digital converter having an input capacitor being connected to the filter capacitor in a switchable manner in response to a second switching signal, the analog-to-digital converter being configured to generate a digital sensor value based on the filtered voltage; and a control circuit configured to generate the first and the second switching signals such that for the selected sensor voltage being forwarded by the selection unit in a first time segment, the filtered voltage across the filter capacitor is formed, and in a second time segment, the input capacitor is connected to the filter capacitor.