Abstract: A channel driver circuit includes a differential module and a driver module. In some examples, the channel driver circuit also includes a sigma-delta module. The differential module receives, via a single node of a load, a channel driving signal that is provided to the load at the single node (e.g., that is based on an electrical characteristic of the load) and generates an analog error signal that is based on the channel driving signal and a reference signal. The driver module is coupled to the differential module and generates the channel driving signal based on the analog error signal or a digital error signal corresponding to the analog error signal and transmits the channel driving signal via the single node to the load. The channel driver circuit simultaneously transmits the channel driving signal to the load at the single node and senses the channel driving signal at the single node.

Abstract: A channel driver circuit includes a differential module and a driver module. In some examples, the channel driver circuit also includes a sigma-delta module. The differential module receives, via a single node of a load, a channel driving signal that is provided to the load at the single node (e.g., that is based on an electrical characteristic of the load) and generates an analog error signal that is based on the channel driving signal and a reference signal. The driver module is coupled to the differential module and generates the channel driving signal based on the analog error signal or a digital error signal corresponding to the analog error signal and transmits the channel driving signal via the single node to the load. The channel driver circuit simultaneously transmits the channel driving signal to the load at the single node and senses the channel driving signal at the single node.

Abstract: A capacitive touch screen display operates by: receiving a plurality of sensed signals indicating variations in mutual capacitance associated with a plurality of cross points formed by a plurality of electrodes; generating capacitance image data associated with the plurality of cross points that includes positive capacitance variation data corresponding to positive variations of the capacitance image data from a nominal value and negative capacitance variation data corresponding to negative variations of the capacitance image data from the nominal value; determining, based on the positive capacitance variation data and the negative capacitance variation data, an upper threshold and a lower threshold; generating compensated capacitance image data, based on the upper threshold and the lower threshold; and processing the compensated capacitance image data to determine a proximal condition of the touch screen display.

Abstract: A method includes providing, by a signal source circuit of a sensing circuit, a signal to a sensor via a conductor. When the sensor is exposed to a condition and is receiving the signal, an electrical characteristic of the sensor affects the signal. The signal includes at least one of: a direct current (DC) component and an oscillating component. When the sensing circuit is in a noisy environment, transient noise couples with the signal to produce a noisy signal. The method further includes comparing, by a transient circuit of the sensing circuit, the noisy signal with a representation of the noisy signal. When the noisy signal compares unfavorably with the representation of the noisy signal, supplying, by the transient circuit, a compensation signal to the conductor. A level of the compensation signal corresponds to a level at which the noisy signal compares unfavorably with the representation of the noisy signal.

Abstract: A fingerprint imaging device incorporating a first plurality of electrodes, a second plurality of electrodes and drive-sense circuitry. The first plurality of electrodes and the second plurality of electrodes are separated by a dielectric material and arranged in a crossing pattern in a sensing area. In an embodiment, each of the drive-sense circuits is configured to drive a sensor signal on an electrode of the first plurality or second plurality of electrodes, the sensor signal including a drive signal component and a receive signal component. Each of the drive-sense circuits is further configured to generate, based on the receive signal component, a sensed signal representative of at least a first impedance of the electrode. For at least some of the drive-sense circuits, the sensed signal further represents a second impedance of the electrode in accordance with a drive signal component from a differing electrode.

Abstract: A touch sensor system includes touch sensors, drive-sense circuits (DSCs), memory, and a processing module. A DSC drives a first signal via a single line coupling to a touch sensor and simultaneously senses, when present, a second signal that is uniquely associated with a user. The DSC processes the first signal and/or the second signal to generate a digital signal that is representative of an electrical characteristic of the touch sensor. The processing module executes operational instructions (stored in the memory) to process the digital signal to detect interaction of the user with the touch sensor and to determine whether the interaction of the user with the touch sensor compares favorably with authorization. When not authorized, the processing module aborts execution of operation(s) associated with the interaction of the user with the touch sensor. Alternatively, when authorized, the processing module facilitates execution of the operation(s).

Abstract: A drive-sense circuit module includes at least one regulated source circuit coupled to a load, and to a loop correction circuit. The regulated source circuit generates a drive signal, which has a regulated characteristic and a controlled characteristic. At least one reference circuit applies a reference signal to the loop correction circuit that establishes a reference value of the controlled characteristic. The loop correction circuit senses an effect of one or more load characteristics on a sensed value of the controlled characteristic of the drive signal and generates a comparison signal based on the sensed value and the reference value of the controlled characteristic. A regulation signal is generated based on the comparison signal and used to regulate the regulated characteristic of the drive signal.

Abstract: A rotating equipment system with in-line drive-sense circuit (DSC) electric power signal processing includes rotating equipment, in-line drive-sense circuits (DSCs), and one or more processing modules. The in-line DSCs receive input electrical power signals and generate motor drive signals for the rotating equipment. An in-line DSC receives an input electrical power signal, processes it to generate and output a motor drive signal to the rotating equipment via a single line and simultaneously senses the motor drive signal via the single line. Based on the sensing of the motor drive signal via the single line, the in-line DSC provides a digital signal to the one or more processing modules that receive and process the digital signal to determine information regarding one or more operational conditions of the rotating equipment, and based thereon, selectively facilitate one or more adaptation operations on the motor drive signal via the in-line DSC.

Abstract: An input device includes a shell and an orientation reference piece within the shell. The orientation reference piece includes one or more primary orientation capacitors, and the orientation reference piece is operable to shift when the input device tilts. The input device further includes a conductive tip coupled to the orientation reference piece and two or more orientation capacitors coupled to the interior of the shell. The first orientation capacitor of the two or more orientation capacitors is substantially parallel to a second orientation capacitor of the two or more orientation capacitors. The orientation reference piece and the two or more orientation capacitors form two or more orientation capacitances. The input device further includes a raw data circuit coupled to the two or more orientation capacitors. The raw data circuit is operable to generate tilt orientation data of the input device with respect to a touch screen.

Abstract: A sensor system operates by: communicating a first ID signal at a first frequency between a first passenger restraint and a first sensor circuit of a touch screen through a body of a first user in a first occupancy area; receiving first sensed signal data from the first sensor circuit indicating a possible interaction with a first interactable element at a first touch screen location based on changes in electrical properties of an electrode of the first sensor circuit; determining the first sensed signal data indicates detection of the first frequency; when permissions data for the first occupancy area indicates occupants of the first occupancy area can interact with the first interactable element, facilitate performance of a functionality associated with the first interactable element; when permissions data for the first occupancy area indicates occupants of the first occupancy area cannot interact with the first interactable element, foregoing performance of the functionality associated with the interaction

Abstract: A touch screen display is operable to operate in a first mode during a first temporal period based on activating exactly one set of drive-sense circuits of a plurality of sets of drive-sense circuits to generate a corresponding one set of sensed signals during the first temporal period, and processing the corresponding one set of sensed signals to generate first proximal interaction data for the first temporal period. The touch screen display is operable to operate in a second mode during a second temporal period after the first temporal period based on activating more than one set of drive-sense circuits of the plurality of sets of drive-sense circuits to generate a corresponding more than one set of sensed signals during the second temporal period, and processing the set of sensed signals to generate second proximal interaction data for the second temporal period.

Abstract: A sensor system operates by: communicating a first ID signal at a first frequency between a first perimeter sensor and a first sensor circuit of a touch screen through a body of a first user in a first occupancy area; receiving first sensed signal data from the first sensor circuit indicating a possible interaction with a first interactable element at a first touch screen location based on changes in electrical properties of an electrode of the first sensor circuit; determining the first sensed signal data indicates detection of the first frequency; when permissions data for the first occupancy area indicates occupants of the first occupancy area can interact with the first interactable element, facilitate performance of a functionality associated with the first interactable element; when permissions data for the first occupancy area indicates occupants of the first occupancy area cannot interact with the first interactable element, foregoing performance of the functionality associated with the interaction wi

Abstract: An organic and inorganic material test system includes at least one test container, a first and second set of electrodes embedded in the at least one test container, a set of transmit circuits coupled to the first set of electrodes, and a set of differential drive-sense circuits (DDSCs) coupled to the second set of electrodes. A first transmit circuit coupled to a first electrode is operable to produce a first transmit signal at a first frequency for transmission through contents of a first test container. A first DDSC coupled to a second electrode of the first test container includes a pair of drive-sense circuits (DSCs) and an output operational amplifier. The pair of DSCs are operable to generate receive signals at the first frequency. The output operational amplifier compares receive signals to produce a signal representative of the contents with respect to positioning of the first and second electrodes.

Abstract: A current reference operative drive-sense circuit (DSC) includes a current source operably coupled to a load and a voltage-mode analog to digital converter (ADC). When enabled, the current source is configured to drive a sinusoidal current reference signal to the load thereby generating a load voltage that is based on the sinusoidal current reference signal and an impedance of the load. The voltage-mode ADC is operably coupled the load and to the current source. When enabled, the voltage-mode ADC configured to perform digital sampling of the load voltage and to generate a digital signal that is representative of the load voltage. In some implementations, one or more processing modules is configured to execute operational instructions to process the digital signal that is representative of the load voltage in accordance with determining impedance of the load and/or change of impedance of the load.

Abstract: A device having a touch screen display with at least a first touch area and a second touch area, the second touch area rollable between an extended position and a closed position. A first plurality of column electrodes are integrated into the first touch area of the touch screen display, a second plurality of column electrodes are integrated into the second touch area of the touch screen display, and a plurality of row electrodes are integrated into and extend across the first touch area and the second touch area. The device further includes a plurality of drive-sense circuits that drive sensor signals on the electrodes. A processing module senses, based on the sensor signals, an electrical characteristic of at least one row electrode and at least one column electrode of the first plurality of column electrodes or the second plurality of column electrodes to determine proximal touches.

Abstract: A method for use in a touch-sensitive panel includes generating electric fields by applying drive signals to a plurality of row electrodes and a plurality of column electrodes included in the touch-sensitive panel, and sensing at least one information signal capacitively coupled to the touch-sensitive panel by detecting impedance changes associated with the plurality of row electrodes and the plurality of column electrodes. The impedance changes are converted to received data. Based on the received data a transmission pattern associated with the at least one information signal is determined. The method further includes associating the transmission pattern with an access code.

Abstract: A fingerprint imaging device incorporating a first plurality of electrodes, a second plurality of electrodes and drive-sense circuitry. The first plurality of electrodes and the second plurality of electrodes are separated by a dielectric material and arranged in a crossing pattern in a sensing area. In an embodiment, each of the drive-sense circuits is configured to drive a sensor signal on an electrode of the first plurality or second plurality of electrodes, the sensor signal including a drive signal component and a receive signal component. Each of the drive-sense circuits is further configured to generate, based on the receive signal component, a sensed signal representative of at least a first impedance of the electrode. For at least some of the drive-sense circuits, the sensed signal further represents a second impedance of the electrode in accordance with a drive signal component from a differing electrode.

Abstract: A battery characterization system includes a drive-sense circuit (DSC), memory that stores operational instructions, and processing module(s) operably coupled to the DSC and the memory. Based on a reference signal, the DSC generates a charge signal, which includes an AC (alternating current) component, and provides the charge signal to a terminal of a battery via a single line and simultaneously to senses the charge signal via the single line to detect an electrical characteristic of the battery based on a response of the battery. The DSC generates a digital signal representative of the electrical characteristic of the battery. The processing module(s), based on the operational instructions, generate the reference signal to include a frequency sweep of the AC component of the charge signal (e.g.

Abstract: A drive-sense circuit module includes at least one regulated source circuit coupled to a load, and to a loop correction circuit. The regulated source circuit generates a drive signal, which has a regulated characteristic and a controlled characteristic. At least one reference circuit applies a reference signal to the loop correction circuit that establishes a reference value of the controlled characteristic. The loop correction circuit senses an effect of one or more load characteristics on a sensed value of the controlled characteristic of the drive signal and generates a comparison signal based on the sensed value and the reference value of the controlled characteristic. A regulation signal is generated based on the comparison signal and used to regulate the regulated characteristic of the drive signal.

Abstract: A touch screen display includes a plurality of electrodes configured to facilitate touch sense functionality based on electrode signals having a drive signal component and a receive signal component, a plurality of drive-sense circuits coupled to at least some of the plurality of electrodes to generate a plurality of sensed signals, and a processing module. The processing module is configured to cause the touch screen display to receive the plurality of sensed signals. A stream of capacitance image data associated with the plurality of cross points is generated based on the plurality of sensed signals. The stream of capacitance image data is processed to detect a touchless gesture.