Abstract: A capacitance sensing system can filter noise that presents in a subset of electrodes in the proximity of a sense object (i.e., finger). A capacitance sensing system can include a sense network comprising a plurality of electrodes for generating sense values; a noise listening circuit configured to detect noise on a plurality of the electrodes; and a filtering circuit that enables a filtering for localized noise events when detected noise values are above one level, and disables the filtering for localized noise events when detected noise values are below the one level.

Abstract: An apparatus may include an internal charge pump within an integrated circuit package, an external pin positioned at an exterior of the integrated circuit package, and a select circuit configured to operate independently from the internal charge pump and located within the integrated circuit package, wherein the select circuit is configurable to selectively couple at least one of the internal charge pump and the external pin to a transmit (TX) sensor electrode.

Abstract: An embodiment of a multiplexer circuit may include a plurality of PTOTAL receive (RX) channel outputs and a plurality of QTOTAL pins, where QTOTAL is greater than PTOTAL. Each of a first subset and a third subset of the plurality of QTOTAL pins may be switchably coupled to at least one of the plurality of RX channels, each of a second subset of the plurality of QTOTAL pins is switchably coupled to two of the plurality of RX channels, and for each possible subset of PTOTAL contiguous pins from the plurality of QTOTAL pins, each pin in the possible subset may be switchably coupled to a different RX channel output of the plurality of RX channel outputs.

Abstract: An apparatus may include an internal charge pump within an integrated circuit package, an external pin positioned at an exterior of the integrated circuit package, and a select circuit configured to operate independently from the internal charge pump and located within the integrated circuit package, wherein the select circuit is configurable to selectively couple at least one of the internal charge pump and the external pin to a transmit (TX) sensor electrode.

Abstract: A capacitance sensing system can filter noise that presents in a subset of electrodes in the proximity of a sense object (i.e., finger). A capacitance sensing system can include a sense network comprising a plurality of electrodes for generating sense values; a noise listening circuit configured to detect noise on a plurality of the electrodes; and a filtering circuit that enables a filtering for localized noise events when detected noise values are above one level, and disables the filtering for localized noise events when detected noise values are below the one level.

Abstract: An apparatus may include an internal charge pump within an integrated circuit package, an external pin positioned at an exterior of the integrated circuit package, and a select circuit configured to operate independently from the internal charge pump and located within the integrated circuit package, wherein the select circuit is configurable to selectively couple at least one of the internal charge pump and the external pin to a transmit (TX) sensor electrode.

Abstract: A method of operating a touch-sensing surface may include determining a presence of at least one conductive object at the touch-sensing surface by performing a search measurement of a first set of sensor elements of the touch-sensing surface, and in response to determining the presence of the at least one conductive object, determining a location of the at least one conductive object by performing a tracking measurement of a second set of sensor elements of the touch-sensing surface.

Abstract: A method of operating a touch-sensing surface may include performing a first scan of a first set of electrodes of a touch-sensing surface, determining a presence of at least one conductive object proximate to the touch-sensing surface, in response to determining the presence of the at least one conductive object, performing a second scan of a second set of electrodes of the touch-sensing surface, and repeating the performing the second scan until the at least one conductive object is no longer proximate to the touch-sensing surface.

Abstract: An apparatus and method for identifying gestures performed on a touch-sensing surface. In one embodiment, a gesture recognition unit processes an input signal to determine input metrics associated with contacts at the touch-sensing surface. The gesture recognition unit identifies a gesture based on comparing at least one of the input metrics with a threshold value associated with the gesture.

Abstract: A method and apparatus detect a first portion of a touch sequence through operating in a first scan mode and detect a second portion of the touch sequence through operating in a second scan mode. A touch sequence may be detected based on the detection of the first portion and the detection of the second portion.

Abstract: A capacitance-sensing device including a current-to-voltage converter and an analog-to-digital converter is described. A sense element is coupled to an input of the current-to-voltage converter. The current-to-voltage converter is configured to convert current changes in the coupled sense element to an output voltage and to maintain a constant voltage at the input. The analog-to-digital converter is configured to convert the output voltage generated by the current-to-voltage converter to a digital value.

Abstract: A method and apparatus perform a first scan of an input device and determine that a first signal profile received through the first scan is outside a range of a reference signal profile. The method and apparatus perform a second scan of the input device responsive to the first signal profile being outside the range of the reference signal profile and use a second signal profile received through the second scan to detect a presence of an input object at least proximate to the input device.

Abstract: A method and apparatus perform a first scan of an input device and determine that a first signal profile received through the first scan is outside a range of a reference signal profile. The method and apparatus perform a second scan of the input device responsive to the first signal profile being outside the range of the reference signal profile and use a second signal profile received through the second scan to detect a presence of an input object at least proximate to the input device.

Abstract: An embodiment of a capacitive touch screen may comprise a display device comprising a substantially transparent substrate, a first plurality of electrodes attached to the substantially transparent substrate, wherein the first plurality of electrodes are substantially parallel in a first direction, and a second plurality of electrodes, wherein each of the second plurality of electrodes is capacitively coupled with each of the first plurality of electrodes.

Abstract: A method of operating a touch-sensing surface may include performing a first scan of a first set of electrodes of a touch-sensing surface, determining a presence of at least one conductive object proximate to the touch-sensing surface, in response to determining the presence of the at least one conductive object, performing a second scan of a second set of electrodes of the touch-sensing surface, and repeating the performing the second scan until the at least one conductive object is no longer proximate to the touch-sensing surface.

Abstract: An apparatus includes multiple capacitive sensing elements coupled through a filter network. The apparatus can include a control device configured to excite the capacitive sensing elements with different scanning frequencies and determine capacitances corresponding to each of the capacitive sensing elements based on sensor responses to the excitation of the capacitive sensing elements with the different scanning frequencies and a configuration of the filter network.

Abstract: An apparatus may include an internal charge pump within an integrated circuit package, an external pin positioned at an exterior of the integrated circuit package, and a select circuit configured to operate independently from the internal charge pump and located within the integrated circuit package, wherein the select circuit is configurable to selectively couple at least one of the internal charge pump and the external pin to a transmit (TX) sensor electrode.

Abstract: A capacitance-sensing device including a current-to-voltage converter and an analog-to-digital converter is described. A sense element is coupled to an input of the current-to-voltage converter. The current-to-voltage converter is configured to convert current changes in the coupled sense element to an output voltage and to maintain a constant voltage at the input. The analog-to-digital converter is configured to convert the output voltage generated by the current-to-voltage converter to a digital value.

Abstract: A capacitance sensing system can filter noise that presents in a subset of electrodes in the proximity of a sense object (i.e., finger). A capacitance sensing system can include a sense network comprising a plurality of electrodes for generating sense values; a noise listening circuit configured to detect noise on a plurality of the electrodes; and a filtering circuit that enables a filtering for localized noise events when detected noise values are above one level, and disables the filtering for localized noise events when detected noise values are below the one level.

Abstract: One embodiment in accordance with the invention can include a capacitive touch screen. The capacitive touch screen includes a substantially transparent substrate and a plurality of electrodes formed on the substantially transparent substrate. The plurality of electrodes are substantially parallel in a first direction and each of the plurality of electrodes includes a layer of light altering material.