Abstract: A touch sensing system comprising a set of touch surfaces in a touch panel including a population of touch surfaces; and at least one touch alert generator separately alerting for touch on each of, and both of, at least first and second touch surfaces from among the population of touch surfaces, wherein the alert generator is operative to determine capacitance of said first touch surface, determine touch object capacitance of said first and second touch surfaces, and compute a difference between the two capacitances, thereby to generate an approximation for touch object capacitance of said second touch surface.

Abstract: Universal serial bus wakeup when the bus is not powered. In one embodiment, a method of waking up a universal serial bus (USB) from a non-powered state, comprises: upon detection of a wakeup condition, a wakeup generation module associated with a USB device generating a wakeup signal on a power line of a USB bus coupled to the USB device, or on a single-wire sideband; and a host wakeup module detecting the wakeup signal and causing the USB bus that is coupled to the USB device to be supplied with power.

Abstract: A multi touch sensing module comprising a plurality of electrically conductive touch surfaces, each connected to at least one trace, wherein the touch surfaces are arranged in more than two columns, each including more than two touch surfaces, wherein touch surfaces in corresponding positions in said columns form staggered rows, and all touch surfaces reside in a single layer of electrically conductive material.

Abstract: An input device includes a touch sensor and a processing unit. The touch sensor has a surface and is configured to sense an imprint of a finger that touches the surface. The processing unit is configured to calculate a tilt of the finger relative to the surface by measuring a shift of the imprint sensed by the touch surface, and to produce an output based on the tilt.

Abstract: Surface-capacitance-based multi-touch touch panel apparatus including a multiplicity of electrically conductive shapes e.g. diamonds arranged along at least one of rows and columns whose capacitance is measured by capacitive sensors; wherein the rows and columns include a set of linear arrays including at least one individual linear array which includes a plurality of first sets of shapes, each first set including n>=1 shapes all shorted to a single set-specific capacitive sensor such that no two first sets are both shorted to a common capacitive sensor.

Abstract: The subject matter discloses an apparatus, comprising a first resistive sheet and a second resistive sheet disposed in proximity to the first resistive sheet, such that pressure applied at a first touch point and at a second touch point on the first resistive sheet causes flow of electrical current between the first resistive sheet and the second resistive sheet. The apparatus further comprises a control unit coupled to a first terminal and to a second terminal, and configured to measure a first resistance between the first terminal and the second terminal; and configured to estimate a distance between the first touch point and the second touch point. The apparatus further estimates the location of the first touch point and the second touch point.

Abstract: The present invention is directed to circuitry for detecting and protecting against over-clocking attacks on hardware modules. The circuitry preferably comprises a test signal, a delay path for providing a delayed signal of the test signal, and circuitry for comparing the logical state of the test signal and the delayed signal and issuing an attack indication whenever the signals are different.

Abstract: Universal serial bus wakeup when the bus is not powered. In one embodiment, a method of waking up a universal serial bus (USB) from a non-powered state, comprises: upon detection of a wakeup condition, a wakeup generation module associated with a USB device generating a wakeup signal on a power line of a USB bus coupled to the USB device, or on a single-wire sideband; and a host wakeup module detecting the wakeup signal and causing the USB bus that is coupled to the USB device to be supplied with power.

Abstract: Apparatus for limiting an output signal frequency of an on-chip clock generator is presented. Electronic circuitry compares the value of a ratio between the internal clock signal frequency and the reference clock input signal frequency with minimum and maximum calibration word signals, in order to determine if the reference clock input signal frequency is within a permitted range. If the reference clock input signal frequency is not within the permitted range, the apparatus sends a tamper alert to the chip or to a system, and the output clock signal frequency is not changed according to the reference clock input signal frequency, thereby protecting the chip from erroneous or tampered clock signal. The output clock signal is buffered from the reference clock input signal insuring that the output clock signal frequency is within the permitted range. The apparatus can operate without providing the reference input clock signal.