Abstract: A touch sensor includes a touch structure including a touch interface and an inner interface arranged opposite to the touch interface; a capacitive ultrasonic transmitter arranged inside an enclosed interior volume and configured to transmit an ultrasonic transmit wave towards the touch structure; a capacitive ultrasonic receiver arranged inside the enclosed interior volume and configured to receive at least one ultrasonic reflected wave produced from the ultrasonic transmit wave via internal reflection; a coupling medium that fills an area between the inner interface and the capacitive ultrasonic receiver, wherein an external force applied to the touch interface is configured to impart an internal pressure onto the capacitive ultrasonic receiver through the coupling medium; and a sensor circuit configured to convert the at least one ultrasonic reflected wave into a measurement signal and detect the external force based on the measurement signal.

Abstract: A touch sensor includes a touch structure; a signal generator configured to generate an excitation signal; a transmitter configured to receive the excitation signal and transmit an ultrasonic transmit wave towards the touch structure based on the excitation signal; a receiver configured to receive an ultrasonic reflected wave produced by a reflection of the ultrasonic transmit wave at the touch structure, wherein the transmitter and the receiver are coupled by a capacitive path, the receiver is configured to be influenced by the excitation signal whereby the excitation signal induces a capacitive cross-talk on the capacitive path, and the receiver is configured to generate a measurement signal representative of the capacitive cross-talk; and a measurement circuit coupled to the receiver and configured to perform a comparison of the measurement signal with a threshold to determine whether a no-touch event or a touch event has occurred at the touch interface.

Abstract: A touch sensor includes: a transmitter configured to transmit an ultrasonic transmit wave towards a touch structure; a receiver configured to receive an ultrasonic reflected wave produced from the ultrasonic transmit signal being at least partially reflecting by the touch structure; a receiver circuit configured to convert the ultrasonic reflected wave into a measurement signal; the receiver circuit configured to generate an error value representative of a difference between a measured value of the measurement signal and a reference value; a programmable voltage source configured to provide a bias voltage to the transmitter or to the receiver; a controller configured to adjust the bias voltage based on the error value; a measurement circuit configured to measure the DC bias voltage and determine whether a no-touch event or a touch event has occurred at the touch structure based on at least one measurement of the bias voltage.

Abstract: A pressure sensor device includes a semiconductor die having a die surface that includes a pressure sensitive area; and a bond wire bonded to a first peripheral region of the die surface and extends over the die surface to a second peripheral region of the die surface, wherein the pressure sensitive area is interposed between the second peripheral region and the first peripheral region, wherein the bond wire comprises a crossing portion that overlaps an area of the die surface, and wherein the crossing portion extends over the pressure sensitive area that is interposed between the first and the second peripheral regions.

Abstract: A touch sensor includes a touch structure arranged over an ultrasound port; an array of transceiver transducers arranged inside the ultrasound port and configured to generate a main directivity lobe directed at a touch interface, receive an ultra-sonic reflected wave produced at least in part by internal reflection of the main directivity lobe at the touch interface, and convert the ultra-sonic reflected wave into at least one measurement signal; a controller configured to modulate a directivity characteristic of the main directivity lobe by selectively activating the transmit transducers; and a receiver circuit configured to determine a size of a contact patch of a touch event present at the touch interface based on the at least one measurement signal and the directivity characteristic of the main directivity lobe, and determine an amount of contact force applied during the touch event based on the size of the contact patch.

Abstract: Examples provide for an apparatus, method, and computer program for comparing the output of sensor cells in an arrangement of sensor cells in an area A, including a set of at least two measurement units. A measurement unit includes at least two sensor cells, wherein at least one sensor cell of at least one measurement unit includes a sensitive sensor cell, which is sensitive with respect to a measured quantity. The sensor cells are intermixed with each other. The apparatus further includes means for selecting output signals of sensor cells of the arrangement and means for determining a measured quantity or determining an intact sensor cell by comparing output signals of different measurement units.

Abstract: A pressure sensor device includes a semiconductor die having a die surface that includes a pressure sensitive area; and a bond wire bonded to a first peripheral region of the die surface and extends over the die surface to a second peripheral region of the die surface, wherein the pressure sensitive area is interposed between the second peripheral region and the first peripheral region, wherein the bond wire comprises a crossing portion that overlaps an area of the die surface, and wherein the crossing portion extends over the pressure sensitive area that is interposed between the first and the second peripheral regions.

Abstract: A pressure sensor device includes a semiconductor die of the pressure sensor device and a bond wire of the pressure sensor device. A maximal vertical distance between a part of the bond wire and the semiconductor die is larger than a minimal vertical distance between the semiconductor die and a surface of a gel covering the semiconductor die.

Abstract: Examples provide for an apparatus, method, and computer program for comparing the output of sensor cells in an arrangement of sensor cells in an area A, including a set of at least two measurement units. A measurement unit includes at least two sensor cells, wherein at least one sensor cell of at least one measurement unit includes a sensitive sensor cell, which is sensitive with respect to a measured quantity. The sensor cells are intermixed with each other. The apparatus further includes means for selecting output signals of sensor cells of the arrangement and means for determining a measured quantity or determining an intact sensor cell by comparing output signals of different measurement units.

Abstract: A pressure sensor device includes a semiconductor die of the pressure sensor device and a bond wire of the pressure sensor device. A maximal vertical distance between a part of the bond wire and the semiconductor die is larger than a minimal vertical distance between the semiconductor die and a surface of a gel covering the semiconductor die.

Abstract: A compiler and method for compiling source code comprising: a library of code patterns and control flow information for each code pattern, wherein each code pattern comprises one or more variable; and a processor arranged to: evaluate the control flow of an expression in the source code, wherein the expression comprises one or more variable, match the expression to one of the code patterns in the library based on the evaluated control flow information, assign value numbers to the one or more variable within the expression, determine if the expression and the matched code pattern are equivalent based on the assigned value numbers, and replace the expression in the source code with a replacement expression if the expression and the matched code pattern are equivalent.

Abstract: A compiler and method for compiling source code comprising: a library of code patterns and control flow information for each code pattern, wherein each code pattern comprises one or more variable; and a processor arranged to: evaluate the control flow of an expression in the source code, wherein the expression comprises one or more variable, match the expression to one of the code patterns in the library based on the evaluated control flow information, assign value numbers to the one or more variable within the expression, determine if the expression and the matched code pattern are equivalent based on the assigned value numbers, and replace the expression in the source code with a replacement expression if the expression and the matched code pattern are equivalent.

Abstract: The present disclosure provides a method for filtering in a cordless electrical device. The method may include coupling a filter network, a microcontroller and a plurality of battery cells having a cell voltage and a current. The method may further include operatively connecting at least one switched capacitor low-pass filter to the plurality of battery cells, the at least one switched capacitor low-pass filter configured to receive a signal from the filter network. The method may also include filtering the signal from the filter network, delivering a filtered signal input to an ADC and generating an output from the ADC.

Abstract: The present disclosure provides a method for filtering in a cordless electrical device. The method may include coupling a filter network, a microcontroller and a plurality of battery cells having a cell voltage and a current. The method may further include operatively connecting at least one switched capacitor low-pass filter to the plurality of battery cells, the at least one switched capacitor low-pass filter configured to receive a signal from the filter network. The method may also include filtering the signal from the filter network, delivering a filtered signal input to an ADC and generating an output from the ADC.