Abstract: A device includes a controller coupled to a touch sensor. The touch sensor includes a first array of capacitive nodes substantially aligned with a second array of capacitive nodes in a mechanical stack. The controller is configured, when in a self-capacitive mode of operation, to send a first drive signal to a plurality of the electrodes of the first array, send a shield signal to at least a portion of the electrodes of the second array at the same time as the first drive signal is sent to the plurality of electrodes of the first array, and sense touch inputs based on signals received from the plurality of electrodes of the first array while the first drive signal is being sent to the plurality of electrodes of the first array and the shield signal is being sent to the at least a portion of the electrodes of the second array.

Abstract: A system and method is disclosed for detecting a specific voltage phase, from a multiphase voltage source, and a specific outlet of an intelligent power strip, that is associated with a residual current flow. The method accomplishes this by using a system that employs a statistical time series analysis using a Pearson's correlation coefficient calculation to measure the linear dependence between the discretely sampled residual current waveform and each phase and outlet's discretely sampled current waveforms, in turn. A residual current as low as 1 mA can be accurately measured and its associated voltage phase source, as well as which outlet of an intelligent power strip it flows out of, can be reliably determined.

Abstract: Methods for arc detection in a system including one or more photovoltaic generators, one or more photovoltaic power devices and a system power device and/or a load connectible to the photovoltaic generators and/or the photovoltaic power devices. The methods may measure voltage, current, and/or power delivered to the load or system power device, and the methods may measure voltage noise or current noise within the photovoltaic system. The methods may periodically, and/or in response to detecting noise, reduce an electrical parameter such as current or voltage in order to extinguish an arc. The methods may compare one or more measurements to one or more thresholds to detect arcing, and upon a comparison indicating that arcing is or was present, an alarm condition may be set.

Abstract: A processor includes a plurality of voltage droop detectors positioned at multiple points of a processor. The detectors monitor voltage levels and alert the processor if a droop event has been detected in real time. Multiple droops can be detected simultaneously, with each detected droop event generating an alert that is sent to a processor module, such as a clock control module, to act based on the detected droop. Each detector employs a ring oscillator that generates a periodic signal and a corresponding count based on that signal, where the frequency of the signal varies based on a voltage at the corresponding point being monitored.

Abstract: A method determines the frequency of an alternating input signal includes storing the input signal, sampling the input signal at a first sampling frequency, a first calculation and a first angular comparison of two phasors representing the input signal at two respective instants, as a function of the input signal sampled at the first sampling frequency, estimating the frequency of the input signal, and searching for a modification of frequency of the input signal. When a modification is detected the method includes, determining a second sampling frequency, sampling the stored input signal with the second sampling frequency, a second calculation and a second angular comparison of two phasors representing the input signal, at two respective instants, as a function of the input signal sampled at the second sampling frequency and of the stored input signal sampled at the second sampling frequency, and estimating the frequency of the input signal.

Abstract: Induction powered electrical current monitoring, and related devices, apparatuses, systems, and methods are disclosed. An electricity current monitoring device can include an inductive energy transfer medium, an energy storage device, a power management circuit, and a processing circuit. The inductive energy transfer medium can induce an electromotive force to produce electrical energy that can be stored in the energy storage device. A power management circuit can control storage of the electrical energy in the energy storage device and can control release of the electrical energy from the energy storage device. The processing circuit can measure the electrical current in the monitored energy source based on the fluctuating magnetic field generated by the inductive energy transfer medium. The processing circuit is electrically coupled to the power management circuit to be powered using the electrical energy released from the energy storage device.

Abstract: A Hall sensor device includes a Hall effect region of a first conductivity type, electrical contact regions configured to provide electrical signals to/from the Hall effect region, and circuitry. Each electrical contact region is formed in a respective well of a second conductivity type that adjoins the Hall effect region. Circuitry includes control terminals, wherein each control terminal is configured to control a conductance in an associated well of the second conductivity type. The circuitry is configured to selectively apply control signals to a first subset of the control terminals to form channels conducting majority carriers of the first conductivity type in the associated wells during a first operating phase, and to selectively apply control signals to a second subset of the control terminals to form channels conducting majority carriers of the first conductivity type in the associated wells during a second operating phase.

Abstract: A method for clock synchronization in a communication system having first circuitry coupled to a first communication channel and second circuitry, includes generating a first timing synchronization parameter, and synchronizing the second circuitry to a second communication channel using the first timing synchronization parameter.

Abstract: A determining method includes: acquiring a measured value for an amount of electric power consumed by the load, the measured value being measured by a watt-hour meter; and determining whether a setting set in a watt-hour meter, the setting according to a current transformation ratio of a current transformer, is appropriate, according to a difference between a predicted value for an amount of electric power to be consumed by a load and the measured value for an amount of electric power consumed by the load.

Abstract: A method for monitoring power used by a power monitoring system is provided. The method includes receiving preset information that defines periods in which one or more preset electric devices are scheduled to operate, and obtaining a power use rate indicating how much power is used in each period. Further, the method includes generating an alternative instruction to decrease estimated power consumption in a target period in which the power use rate increases. The estimated power consumption is estimated power consumption in the building in the target period in which the power use rate increases, using power consumption information, to which power consumption of the electric devices to be preset is registered in advance, and the preset information. The alternative instruction is displayed on a display of a terminal apparatus.

Abstract: A voltage stability monitoring device, which monitors voltage stability of a power system, produces a plurality of assumed change scenarios indicating a scenario of a change that is assumed based on at least one of a system configuration of the power system and a change of a tide state, calculates the voltage stability using the assumed change scenario, calculates a voltage stability margin indicating margin degree of the voltage stability, based on the voltage stability selects an assumed change scenario with high severity of the voltage stability for each assumed change scenario, based on the voltage stability margin calculates which buses in the power system are vulnerable buses that decrease voltage stability, based on the assumed change scenario which is selected, and changes a monitoring target of the voltage stability, based on information of the vulnerable bus.

Abstract: A device includes a controller coupled to a touch sensor. The touch sensor includes a first array of capacitive nodes substantially aligned with a second array of capacitive nodes in a mechanical stack. The controller is configured, when in a self-capacitive mode of operation, to send a first drive signal to a plurality of the electrodes of the first array, send a shield signal to at least a portion of the electrodes of the second array at the same time as the first drive signal is sent to the plurality of electrodes of the first array, and sense touch inputs based on signals received from the plurality of electrodes of the first array while the first drive signal is being sent to the plurality of electrodes of the first array and the shield signal is being sent to the at least a portion of the electrodes of the second array.

Abstract: In a differential protection method for monitoring a line of a power grid, current indicator measured values are measured at the ends of the line and are transmitted to an evaluation device. A differential current value is formed with current indicator measured values temporally allocated to one another. The time delay between local timers of the measuring devices is used for the temporal allocation of the current indicator measured values measured at different ends. A fault signal indicating a fault affecting the line is generated if the differential current value exceeds a predefined threshold value. A check is carried out using electrical measured quantities temporally allocated to one another and a line-specific parameter to determine whether the time delay information indicates the actual time delay between the respective local timers. A time error signal is generated if erroneous time delay information is detected.

Abstract: An intelligent electronic device (IED) may provide point on wave switching. The IED may receive a control operation request, and determine when to issue a control command to cause a switch to change positions. The actuation of the switch may occur at a target point on an alternating current. An IED may have a processor that is too slow to implement a switch when a desired point on an alternating current first occurs. Accordingly, some embodiments may compensate for the processing speed of an IED by determining a number of processor cycles needed (in advance) to issue a control command so that the resulting action results in the desired point on wave open or close.

Abstract: A system includes hardware logic circuit configured to execute power control software. The hardware logic circuit executes the power control software to receive a request from a processing unit for delivery of a power level corresponding to a first power state and determine that the processing unit should operate at a second power state, where the second power state is different than the requested first power state. The hardware logic circuit also executes the power control software to cause a power supply to deliver a power level corresponding to the second power state to the processing unit.

Abstract: A method for monitoring an LVDT sensor including two secondary circuits, the method including: calculating the difference between voltages at terminals of one of the secondary circuits at a given instant and at a previous instant; calculating the difference between voltages at terminals of the other one of the secondary circuits at the given instant and at the previous instant; calculating the sum of the two differences calculated; modifying an indicator according to a distance to zero of the previously calculated sum; and comparing the indicator with at least one predetermined threshold.

Abstract: Disclosed herein are systems and methods to perform electrical analysis of a circuit design to verify electrical behavior and performance of the circuit design in a two-step process. Initially, a simulator transient analysis is performed on circuit blocks of a circuit design to obtain a current through each device path in each circuit block, and using the current obtained the IR drop and EM problems are examined to get EM-IR drop analysis. Next, a simulator transient analysis is performed on a top level circuit of a circuit design and current values generated in a first step to obtain EM-IR drop analysis for a full circuit design such that a circuit designer may debug, analyze and visualize various IR and EM value plots for circuit blocks and top level circuit of the circuit design together or separately.

Abstract: An organic light emitting display device can include data lines; scan lines; subpixels; a data driver; and a scan driver, in which each of the subpixels includes: an organic light emitting diode; a driving transistor connected to the organic light emitting diode; a first transistor controlled by a first scan signal applied to a first gate node and connected between the driving transistor and a data line; a second transistor controlled by a second scan signal applied to a second gate node and connected between the driving transistor and a reference voltage line; a third transistor controlled by a data voltage applied to a third gate node and connected between the second gate node of the second transistor and the second scan line; and a storage capacitor connected between the first node and the second node of the driving transistor.

Abstract: Techniques for monitoring the health of a device comprising a motor or generator are described. An apparatus to monitor the health of the device includes a plurality of sensors to detect root-mean-square (RMS) current values for a plurality of stator windings of the device. The apparatus also includes a processor to receive the RMS current values from the plurality of sensors and compute a fault indicator based on the RMS current values. The fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults.

Abstract: A State of Charge (SOC) estimation device is provided for a secondary battery in which a correlation curve indicating a relationship between an SOC and Open Circuit Voltage (OCV) differs between a charging process and discharging process. The SOC estimation device estimates the SOC based on a relational formula in which as measured OCV increases, weights are assigned to the correlation curve for the discharging process, and as the measured OCV decreases, weights are assigned to the correlation curve for the charging process. Thus, the SOC estimation device provides accurate SOC estimates regardless of whether the secondary battery is being used or not.

Abstract: A microwave measuring device having a transmitting module and a receiving module and an apparatus having these modules are described. The two modules are accommodated either in a common housing or in separate housings. The transmitting module can be coupled to a transmitting antenna and the receiving module can be coupled to a receiving antenna. In order to compensate for measurement errors, in particular temperature-related measurement errors, at least one RF bypass cable runs outside the housing/the housings and can be used to couple the transmitting module and the receiving module while bridging the measuring section defined by the two antennas.

Abstract: In a switching power supply apparatus, a magnitude of an output current of a first converter, which has been detected in a state in which a second converter is stopped, is transmitted to a measurement tool and a magnitude of an output current of the second converter, which has been detected in a state in which the first converter is stopped, is transmitted to the measurement tool. Correction values determined by the measurement tool based on transmission contents are received and stored in a memory. A magnitude of the output current which is used for PWM control of the first converter and a magnitude of the output current which is used for PWM control of the second converter are respectively corrected with the correction values.

Abstract: An operating system of a computing device determines an importance of the threads running on the computing device, such as assigning the importance of the threads as critical or non-critical. The operating system determines when there are no threads having at least a threshold importance (e.g., no critical threads), and forces one or more components of the computing device into a forced idle state in response to determining that there are no threads having at least the threshold importance. The forced idle state of a device component is a low power state, such as a state in which program instructions are not executed, so the computing device is forced into a forced idle state that reduces power usage in the computing device despite there being threads (e.g., non-critical threads) to be executed.

Abstract: A system and a method for estimating component parameters relating to electric components of an electric circuit comprising the steps of receiving one or more sample variables associated with the electric circuit, applying the one or more sample variables to one or more component relationships associated with an arrangement of the electric components of the electric circuit, and processing the one or more component relationships with an approximation process to determine one or more estimated component parameters.

Abstract: A transformer connection phase determination device includes a processor that executes a procedure. The procedure includes: computing respective correlation values representing a correlation between current corresponding to power consumed by at least one consumer connected to a transformer connected to one phase corresponding to a combination of two of a plurality of power distribution lines, and line current flowing in each of the plurality of power distribution lines; and determining the phase the transformer is connected to based on the respective correlation values.

Abstract: A programmable AC load in communication with an equipment under test (EUT) is disclosed. The EUT generates an equipment under test voltage. The programmable alternating current (AC) load includes an active load profiler (ALP), a grid-connecter inverter, and an operational mode selector. The operational mode selector is in communication with an AC side of the grid-connected inverter. The operational mode selector places the programmable AC load in either a regenerative mode where the equipment under test voltage is sent to a main grid or a dissipative mode where the equipment under test voltage is dissipated by heat.

Abstract: An analog block implemented with a band-gap reference scheme for use in a device includes a mode control unit and a band-gap reference circuit. The mode control unit is configured to generate a mode selection signal associated with the operational mode of the device. The band-gap reference circuit includes a bias generator, an error amplifier, and a band-gap loop circuit. The bias generator is configured to provide a band-gap reference voltage in a first bias state when the device operates in a normal mode or in a second bias state when the device operates in a standby mode. The error amplifier is configured to generate an error voltage according to the bias voltage. The band-gap loop circuit is configured to provide a band-gap reference voltage according to the error voltage. First current flowing through the bias generator in the first bias state is larger than second current flowing through the bias generator in the second bias state.

Abstract: A system for monitoring a nickel-cadmium battery incorporating twenty nickel-cadmium battery cells connected in series in a passenger aircraft includes a plurality of cell sensors for measuring the cell voltage and the cell temperature of individual battery cells and a data processing unit, and is set up to measure the battery current. The data processing unit is set up to determine a state of health value which is indicative of the state of health of the battery from the measurement data of the cell sensors and the measured battery current.

Abstract: The present disclosure describes systems, methods, and computer-readable storage media implementing techniques for providing split control of an execution environment. According to aspects of the disclosure, a first entity may be configured to exert control over presentation related aspects (e.g., the look and feel) of services provided by a second entity, while the second entity may exert control over backend processing and execution of the services. To facilitate the different portions of the split control, one or more servers may be configured to provide a first execution layer, a second execution layer, and a second execution layer control panel. The first execution layer may perform operations for executing the provisioning of the service.

Abstract: A means and method for measuring precise voltage phasors on medium-voltage alternating current (AC) distribution grids, using existing distribution transformers as voltage sensors. The errors introduced by the distribution transformers are minimized by taking into account the transformer's vector impedance, combined with measuring the transformer secondary current phasor. The invention includes a means and a method of measuring the distribution transformer's vector impedance.

Abstract: To provide a measurement method of characteristics of an electrical element which causes variation in the luminance of pixels. In a device which includes components (pixels) arranged in a matrix and a wiring and where each component is can supply current to the wiring through an electrical element included in each component, the directions of current in N components capable of supplying current to the wiring are individually set and the current flowing through the wiring is measured N times. Here, the directions of the current flowing through the electrical elements can be changed. In the respective N measurements, combinations of the directions of current in the N components differ from one another. The amount of current flowing through each electrical element is calculated based on current obtained by the N measurements and the combinations of the directions of the current in the N measurements.

Abstract: A voltage converter includes a variable switching frequency power stage, a passive circuit and a control circuit. The power stage includes a high-side switch and a first low-side switch coupled to the high-side switch at a switching node of the power stage. The passive circuit couples the switching node to an output node of the voltage converter. The control circuit is operable to control cycle-by-cycle switching of the power stage and sample current at a point between the switching node and the output node, the sampled current having a half cycle sinusodial-like shape each switching cycle. For the present switching cycle, the control circuit is operable to calculate an average of the sampled current for the immediately preceding switching cycle and estimate the average sampled current for the present switching cycle based on the average sampled current calculated for the immediately preceding switching cycle.

Abstract: A device includes a controller coupled to a touch sensor. The touch sensor includes a first array of capacitive nodes substantially aligned with a second array of capacitive nodes in a mechanical stack. The controller is configured, when in a self-capacitive mode of operation, to send a first drive signal to a plurality of the electrodes of the first array, send a shield signal to at least a portion of the electrodes of the second array at the same time as the first drive signal is sent to the plurality of electrodes of the first array, and sense touch inputs based on signals received from the plurality of electrodes of the first array while the first drive signal is being sent to the plurality of electrodes of the first array and the shield signal is being sent to the at least a portion of the electrodes of the second array.

Abstract: A first calculating unit calculates a load current of each distribution facility based on a sending voltage in a power source facility and load information on power consumption facilities in an electrical circuit including the power source facility, the distribution facilities, and the power consumption facilities connected to one another to form the electrical circuit. A second calculating unit calculates the amount of power loss in each distribution facility based on the calculated load current of each distribution facility.

Abstract: A method for driving an electroluminescent display device includes grouping pixels in a display panel into a plurality of pixel groups, each pixel group including a plurality of rows and a plurality of columns. Accumulated block stress values are provided based on input image data. Each accumulated block stress value represents a degree of degeneration of the pixels in each pixel block. Corrected stress values are provided by correcting each accumulated block stress value based on the accumulated block stress values of the adjacent pixel blocks. Input image data is corrected based on the corrected stress values.

Abstract: Disclosed is an injector controlling method using an opening duration. The injector controlling method using an opening duration converts a target fuel quantity into an opening duration and sets relationship between the opening duration and an injector actuation signal in order to control the fuel quantity of injectors more accurately.

Abstract: A method mitigates or prevents voltage flicker in an electrical power system that includes at least one power generating, energy storing, or power dissipating facility connected to a power grid and a controller connected to the facility. The method includes receiving in the controller a power value at a present time t and a power value at time t+T or at time t?T to determine a power change of the facility, calculating a voltage flicker impact on the power grid of the power change, determining if the flicker impact of the power change is above a limit, and sending a control signal from the controller to the facility when the flicker impact of the power change is above the limit to adjust the facility.

Abstract: A data processing method and an apparatus for an organic light emitting diode (OLED) display device are provided.

Abstract: To provide a measurement method of characteristics of an electrical element which causes variation in the luminance of pixels. In a device which includes components (pixels) arranged in a matrix and a wiring and where each component is capable of supplying current to the wiring through an electrical element included in each component, supply and non-supply of current of N components are individually set and current flowing through the wiring is measured N times. In the respective N measurements, combinations of the supply and non-supply of current in N components capable of supplying current to the wiring differ from one another. The amount of current flowing through each electrical element is obtained based on current obtained by the N measurements and the combinations of supply and non-supply of current in the N measurements.

Abstract: A method and arrangement for operating a motor vehicle having a vehicle electrical system having a semiconductor switch, which during the vehicle operation is loaded with load events based on at least one load-influencing factor, and for which a service life load relationship is predefined, for a nominal service life for a nominal load, and with which for at least one point in time within the nominal service life a nominal load proportion corresponding to the at least one point in time is ascertainable, and the method for the at least one point in time including ascertaining an actual load of the semiconductor switch based on establishing past load events at the at least one point in time, the ascertaining of the nominal load proportion corresponding to the at least one point in time with the predefined service life load relationship, and comparing of the actual and nominal load proportion at the at least one point in time and the reducing of the at least one load-influencing factor when the actual load excee

Abstract: A frequency mask trigger capable of triggering based on a logical combination of two or more areas of a frequency mask transforms a frame of digital data representing an input signal into a frequency spectrum having a plurality of frequency bins, with each frequency bin having a power amplitude value. A frequency mask is defined having a plurality of reference power levels, one reference power level being associated with each frequency bin. Two or more areas of the frequency mask are defined, with each mask area corresponding to one or more of the frequency bins. A violation status is determined for each mask area by comparing all of the power amplitude values within each mask area to the associated reference power level. If any of the power amplitude values within the mask area violates the associated reference power level, then the entire mask area is deemed to be violated. A trigger signal is generated when a logical combination of the violation statuses of the mask areas is satisfied.

Abstract: A method for determining a topology information item on a low-voltage electrical distribution system. A group of at least two current measuring devices that are arranged at different points in the low-voltage distribution system is selected, and in each case the current is measured by the current measuring devices so as to form a current measurement value. The current measurement values are added so as to form a current sum taking into consideration the current flow direction. A topology information item is formed which specifies that the current measuring devices electrically isolate a load-free and source-free section of the low-voltage distribution system when the current sum, in terms of absolute value, falls below a predetermined threshold value.

Abstract: Disclosed herein are various battery power measurement devices, methods, and related apparatuses. In one embodiment, a method of measuring a battery power can include: (i) detecting a voltage and a temperature at an output terminal of a battery; (ii) obtaining a first correction coefficient based on a battery open-circuit voltage at a previous sample time; (iii) obtaining a second correction coefficient based on the battery temperature; (iv) calculating a real-time battery open-circuit voltage by using the voltage at the output terminal of the battery, the first and second correction coefficients, the battery open-circuit voltage at the previous sample time, and a time interval between the previous sample time and a present sample time; and (v) converting the real-time battery open-circuit voltage into a battery power measurement for display.

Abstract: According to one aspect, embodiments of the invention provide a system monitor for a load center comprising a current sensor configured to be coupled to a circuit branch within the load center and to produce a measurement signal having a level related to a current level of the circuit branch, a sensor circuit coupled to the current sensor and removably coupled to a terminal, the sensor circuit configured to provide the measurement signal to the terminal, and a controller coupled to the terminal and configured to monitor signals at the terminal, wherein the controller is further configured to detect disconnection of the current sensor from the terminal based on a signal level at the terminal.

Abstract: Apparatus and method for registering conditions of performance in a photovoltaic array are provided. A group of neighboring photovoltaic modules may be arranged to sense a reference performance for a respective photovoltaic module of the photovoltaic array. Each of the neighboring photovoltaic modules may have a transmitter to transmit data indicative of the reference performance. The respective photovoltaic module may have a receiver to receive the data transmitted by the group of neighboring photovoltaic modules. A processor in the respective photovoltaic module may be provided to compare data indicative of its respective performance relative to the data received from the group of neighboring photovoltaic modules. The processor may be configured to register a condition of the performance of the respective photovoltaic module based on a result of the data comparison.

Abstract: A multisensory meter system is disclosed. The system comprises one main unit and a plurality of remote units. Each remote unit has at least a sensor to measure a physical parameter and wirelessly transmit the measured parameter as a signal to the main unit. The main unit and the remote units have an interface that allows at least one the remote units to be attached to the main unit. When attached, the main unit and the remote unit function as a single meter, and the main unit is capable of receiving signals from the other remote units. In one embodiment, the main unit and the remote units form a mesh network to transmit and receive signals, wherein each remote unit receives signals and transmits said signals. The mesh network may also contain relays. The remote units may measure a number of physical parameters such as relative humidity, temperature, vibration, moisture, electrical current, air speed, voltage and rotational speed.

Abstract: A smartcard connector for connecting a smartcard within a card holder to an electronic device. The smartcard connector includes a card holder having a card holding space, a contact pad integral with the card holder and in communicative contact with the card holding space, and an external adapter integral with the card holder and in electrical contact with the contact pad. The adapter is for communicatively connecting a smartcard received and held within the card holding space and in electrical contact with the contact pad to an external data cable. The data cable is also connected to an electrical device, such as a computer, so that the smartcard may be accessed by the computer without removing the smartcard from the card holder. The card holder may also include a battery, display screen, read/write memory, security unit, notification unit, amplification unit, and/or a light.

Abstract: Some embodiments of the present invention provide a system that estimates a state of charge for a battery. During operation, while the battery is relaxing toward a fully rested state, the system determines if a modified state of charge of the battery is substantially consistent with a predetermined decay pattern. If so, the system estimates the state of charge of the battery as a value of the modified state of charge determined at the time when the consistency is observed. Otherwise, the system continues monitoring the modified state of charge of the battery. In one embodiment, the predetermined decay pattern is a single exponential decay. After estimating the state of charge of the battery, the system may determine an uncertainty of the estimated state of charge.

Abstract: An observation is made that the peak voltage value for a rectified AC voltage signal is substantially the same from cycle to cycle. Using this observation, a method of measuring an AC voltage is used to determine a more accurate RMS voltage value under light load conditions. The method includes rectifying the AC voltage signal to form a rectified signal, sampling the rectified signal to obtain a set of sampled values for each half-cycle of the AC voltage signal, searching the sampled values for each half-cycle to determine a local minimum value for each half-cycle, searching the sampled values following the local minimum value to determine a local maximum value for each half-cycle, and calculating a root mean square value from the local maximum value for each half-cycle thereby determining the root mean square value for each half-cycle of the AC voltage signal.

Abstract: The disclosure describes a novel method and apparatus for testing different types of TSVs in a single die or different types of TSV connections in a stack of die. The testing is facilitated by test circuitry associated with each type of TSV. The test circuitry includes a scan cell adapted for testing TSVs.