Abstract: In one embodiment, a method includes receiving one or more sense signals from a touch sensor of a device, comparing a value associated with the one or more sense signals to a first threshold, and determining, based on comparing the value to the first threshold, whether an object has come within a pre-determined proximity of a first pre-determined location at a surface of the device. The method further includes comparing the value associated with the one or more sense signals to a second threshold and determining, based on comparing the value to the second threshold, whether the object has come within a pre-determined proximity of a second pre-determined location at the surface of the device.

Abstract: In one embodiment, a method includes applying a drive signal to an electrode of a touch sensor of a device. The touch sensor extends across an area of a surface of the device, and the drive signal is configured to generate an electric field that extends outward from the area of the surface that the touch sensor extends across and reaches a pre-determined location on the device that is outside the area of the surface that the touch sensor extends across. The method includes receiving a sense signal from the touch sensor produced at least in part by the electric field. The sense signal indicates whether an object has come within a pre-determined proximity of the pre-determined location.

Abstract: In one embodiment, a stylus includes a controller, a delay line, a coefficient line and a computer-readable non-transitory storage medium. The controller is operable to receive a synchronization signal that is transmitted from a computing device and received by the stylus. The delay line is operable to store a first consecutive edges of the synchronization signal. The coefficient line includes a pre-determined coefficient vector.

Abstract: In one embodiment, a stylus includes a controller, a delay line, a coefficient line and a computer-readable non-transitory storage medium. The controller is operable to receive a synchronization signal that is transmitted from a computing device and received by the stylus. The delay line is operable to store a first consecutive edges of the synchronization signal. The coefficient line includes a pre-determined coefficient vector.

Abstract: In one embodiment, a stylus includes a controller, a delay line, a coefficient line and a computer-readable non-transitory storage medium. The controller is operable to receive a synchronization signal that is transmitted from a computing device and received by the stylus. The delay line is operable to store a first consecutive edges of the synchronization signal. The coefficient line includes a pre-determined coefficient vector.

Abstract: In one embodiment, a method includes applying a drive signal to an electrode of a touch sensor of a device. The touch sensor extends across an area of a surface of the device, and the drive signal is configured to generate an electric field that extends outward from the area of the surface that the touch sensor extends across and reaches a pre-determined location on the device that is outside the area of the surface that the touch sensor extends across. The method includes receiving a sense signal from the touch sensor produced at least in part by the electric field. The sense signal indicates whether an object has come within a pre-determined proximity of the pre-determined location.