Austriamicrosystems Ag

Ams Ag

Kurt Riedmüller

Gerhard Oberhoffner

Colin Steele

Richard Forsyth

Dominik Ruck

Davide Maschera

Stephan Michelitsch

Simone Sabatelli

A sensor arrangement has a plurality of Hall sensor devices, each configured to provide a sensor voltage in response to a magnetic field intensity. A selection unit is configured to forward either of the sensor voltages in response to a selection signal. A transconductance amplifier is configured to generate a sensing current depending on a forwarded sensor voltage. A filter stage has a resistor and a filter capacitor connected in parallel in a switchable manner in response to a first switching signal. The filter stage is configured to generate a filtered voltage across the filter capacitor depending on a sensing current. A capacitive analog-to-digital converter has 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 is configured to generate a digital sensor value based on a filtered voltage. The sensor arrangement further has a control circuit which is configured to generate the selection signal and the first and the second switching signals such that for each of the forwarded sensor voltages in a first time segment, the filtered voltage across the filter capacitor is generated, and in a second time segment, the input capacitor is connected to the filter capacitor.

Sensor arrangement and method for operating a sensor arrangement

A controller includes a control circuit. The control circuit includes a forward path that includes an input and an output, a feedback path coupled to the output and to the input, and a sensor that is between the input and the output. The sensor generates a sensor signal based on an input signal applied to the input. The forward path generates an output signal based on the sensor signal. The output signal is sent along the feedback path to the input of the forward path. The controller also includes a detector that obtains an intermediate signal from the forward path between the input and the output. The detector generates a control signal using the intermediate signal. The forward path includes a control device that limits the output signal to a predetermined value. The detector controls the control device using the control signal.

Control system including a control circuit and sensor, and method for operation of the control system

A sensor arrangement has a sensor array (SA) with a first, a second, and a third sensor focus (SSP, SSP, SSP), which are located along a main linear direction (L) and in which the third sensor focus (SSP) is located in the middle between the first and second sensor foci (SSP, SSP). Individual sensor devices (SM, SM, SM) with magnetic field sensors that provide a first, second, and third set of sensor signals are correlated with the sensor foci (SSP, SSP, SSP). A first and a second channel signal (CH, CH) are derived as a function of the sets of sensor signals in a processing device (PRC) via a first and a second combination device (K, K). An evaluation unit (EV) is configured to derive a phase angle as a function of the channel signals (CH, CH).

Sensor arrangement, integrated chip component with the sensor arrangement, and measurement method

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Unterpremstätten, Austria

Kurt Riedmüller