Abstract: A semiconductor integrated circuit capable of controlling test modes without stopping testing of the semiconductor integrated circuit is presented. The semiconductor integrated circuit includes a test mode control unit configured to produce, in response to address decoding signals, a plurality of test mode signals of a first group and a plurality of test mode signals of a second group. The test mode control unit selectively inactivates the test mode signals of the first group by providing a reset signal using the test mode signals of the second group. Therefore, the testing time of the semiconductor integrated circuit can be reduced by inactivating the previous test mode using the reset signal and by executing a new test mode without disconnecting the test mode state.

Abstract: Preferably, an embodiment of a sensor probe assembly includes at least a conductive pin securement member, and a multitude of conductive pins cooperating with the conductive pin securement member. Each conductive pin has a multitude of degrees of freedom relative to, as well as separate and distinct from, each of the remaining plurality of conductive pins. More preferably, an embodiment of a sensor probe assembly includes at least a flexible, electrically conductive pin securement member formed from a polymer filled with conductive particles. Interacting with the flexible, electrically conductive pin securement member is a plurality of electrically conductive pins, wherein each electrically conductive pin has a multitude of degrees of freedom relative to each of the remaining plurality of conductive pins, and cooperates with the electrically conductive pin securement member in a pressing engagement relationship.

Abstract: A testing method of a magnetic head includes: applying a first magnetic field with a constant intensity in a first direction that is the same with that of the longitudinal bias field to the magnetic head, simultaneously applying a second magnetic field with variant intensities in a second direction traversing the air bearing surface, and measuring a first noise; applying a third magnetic field with a constant intensity in a third direction that is opposite to the first direction to the magnetic head, simultaneously applying the second magnetic field with variant intensities in the second direction, and measuring a second noise; and analyzing noise change between the first noise and the second noise. The invention can screen out defective magnetic heads that possess poor noise characteristic and unstable performance.

Abstract: This disclosure relates to delay line test circuits and methods. In one aspect, an integrated circuit (IC) can include a plurality of delay lines, a selection circuit, a delay comparison circuit, and a control circuit. The plurality of delay lines can generate a plurality of delayed clock signals, and the selection circuit can include a plurality of inputs configured to receive at least the plurality of delayed clock signals. The selection circuit can generate a first output clock signal and a second output clock signal by selecting amongst signals received at the plurality of inputs based on a state of a selection control signal. The delay comparison circuit can compare a delay of the first output clock signal to a delay of the second output clock signal and can generate a delay comparison such as a pass/fail flag based on the result. The control circuit can generate the selection control signal.

Abstract: The invention relates to a method and a device for determining a maximum leakage current in unearthed power supply networks with a plurality of conductors. The method comprises the steps of: feeding of a measurement signal UP with a measurement frequency fpuls into a conductor arrangement, setting the measurement frequency fPuls, measuring a line-to-line voltage UL-E for each conductor, determining a maximum occurring line-to-line voltage UL-Emax from the measured line-to-line voltages UL-E, determining a voltage UZe across a measurement resistance RM for calculating a leakage impedance ZE, calculating the leakage impedance ZE, and calculating a maximum leakage current THC. The device comprises a signal generator for feeding in the UP with the fPuls, a network coupling circuit between the signal generator and the conductor arrangement, a voltage measuring circuit for measuring the UL-E, and an impedance measuring circuit for determining the Ze by means of the determining of the UZe.

Abstract: A process for calibrating a first loop feature value estimation method using a first locally measurable loop characteristic and a first set of parameters, includes taking measurements of the first locally measurable loop characteristic for a plurality of loops, and obtaining a reference data set representing reference estimates of the loop feature value. The reference estimates are obtained by performing a calibrated second loop feature value estimation method using a second locally measurable loop characteristic and a second set of parameters. The method further includes determining calibrated parameters so as to minimize a deviation between the reference estimates and estimates obtained by applying the first estimation method to the measurements using the calibrated parameters as the first set of parameters.

Abstract: An apparatus may include a delay line having a first delay value corresponding to first operating conditions of the apparatus and a second delay value corresponding to second operating conditions of the apparatus. A monitoring circuit may monitor a time taken for a first clock edge of a clock signal to propagate through the delay line. A determining circuit may determine whether operating conditions of the apparatus are acceptable in response to the time taken.

Abstract: A load pull measurement setup allows independent impedance tuning at RF frequencies at the output of the DUT as well as independent tuning at RF and baseband frequencies of the modulated signal at the input of the DUT. This allows optimizing baseband frequency impedances for nonlinear amplifier performance when processing modulated signal, such as IMD, ACPR etc. Baseband tuning is done using a low frequency programmable impedance tuner, which is connected through the input bias tee, which acts as a frequency separator (diplexer). The input bias tee may be an LC based network or a 3 dB matched coupler based network.

Abstract: A quenching depth measuring method is used for measuring the quenching depth in a workpiece and includes the steps of: magnetizing the workpiece by disposing, in the vicinity of the workpiece, a magnetizer equipped with an exciting coil; detecting, through a detection coil, an induced magnetic field generated by the magnetization; measuring the induced magnetic field as the output voltage of the detection coil; and specifying the thickness of the quenched hardened layer of the workpiece on the basis of known electromagnetic characteristic information of an unquenched material and a fully-quenched material and an output voltage value measured by the detection coil, the unquenched material being made of the same material as the constituent material of the workpiece and being a material on which a quenching process is not performed, the fully-quenched material being a material on which the quenching process is performed.

Abstract: A shield for protecting a current transducer from noise may include a first annular ring that may be disposed adjacent to a first side of a current sensor. The shield may also include a second annular ring that may be disposed adjacent to a second side of the current sensor opposite the first side, such that the first and second annular rings each include magnetically permeable material.

Abstract: The disclosure relates to a cubicle type gas insulated switchgear monitoring and diagnosis system that is able to remotely monitor and diagnose the state by measuring and analyzing in real time deterioration of a gas section and the operation state and the integrity assessment of a breaking unit in a cubicle gas insulated switchgear. The system includes the cubicle gas insulated switchgear, a Slave Data Acquisition System connected to the cubicle gas insulated switchgear, and a Master Data Acquisition System that determines deterioration of the cubicle type gas insulated switchgear and the operation state and the integrity assessment of the breaking unit by receiving and analyzing the sensing data from the S-DAS.

Abstract: A vertical Hall device includes a Hall effect region formed in a substrate and a sequence of at least six contacts arranged in or at a surface of the Hall effect region between a first contact and a last contact. The vertical Hall device also includes a first contact interconnection connecting the first contact with a third to the last contact. A vertical Hall device further includes a second contact interconnection connecting a third contact with the last contact. Further embodiments made to a sensing method for sensing a magnetic field parallel to a surface of a substrate.

Abstract: Embodiments of the present invention disclose an apparatus and method to determine the intra-chip variation of an integrated circuit. In an embodiment, an apparatus comprises a test macro that includes two or more test structures; wherein each test structure includes identical copies of the same performance monitor; wherein each performance monitor has a unique bounding circuitry that encompasses the performance monitor; and wherein the two or more test structures are positioned close enough to each other as to reduce systematic across chip variation between the two or more test structures.

Abstract: In a method of detecting a leak in a water impermeable membrane applied on a roof substrate, an electrical potential is created between a conductive detector on top of the membrane and the roof substrate causing current to flow between the roof substrate and the conductive detector through moisture in any leak in the membrane. The membrane is attached to the roof support substrate by an intervening layer therebetween which can be a primer or an adhesive layer which is caused to be electrically conductive by the addition an electrically conductive material. This allows the conductor on the roof substrate to which the potential difference is applied to be attached onto the roof substrate and covered by the layer underneath the membrane.

Abstract: A capacitive proximity sensor circuit capable of distinguishing between instances of detected user proximity includes one or more guard electrodes, a first sensor, and a second sensor. The capacitive proximity sensor is installed in a device such that a first sensor faces a first component of the device, and the second sensor faces a second component of the device. The first and second sensors measure a capacitance to detect proximity of a user relative to the respective sensor. The guard electrode is provided to mitigate stray capacitance to reduce error in the capacitance measurements obtained by the first and second sensors.

Abstract: An apparatus comprises a connector configured to receive an electrical contact of an accessory device that is electrically coupled to a resistor of the accessory device, a current source configured to apply a specified current to the resistor to generate a resulting voltage, a comparator configured to receive and compare the resulting voltage to a reference voltage, and a controller configured to store an outcome of the comparison as a bit in a register, to adjust the applied current using the outcome of the comparison, and to determine a resistance value for the resistor using the bit stored in the register.

Abstract: Disclosed is an apparatus for estimating a property of an earth formation penetrated by a borehole. The apparatus includes a carrier configured to be conveyed through the borehole and having a first transmitter electrode configured to inject electrical current into the formation and a first measurement electrode configured to receive electrical current for measurement due to the current injection in order to estimate the property of the earth formation. A controller is configured to determine a phase difference between injected electrical current and received electrical current. A first bucker amplifier is coupled to the first measurement electrode and configured to apply a voltage to the first measurement electrode based on the determined phase difference in order for a phase of current received by the first measurement electrode to be substantially in phase with the current injected by the first transmitter electrode.

Abstract: An apparatus for determining the position of the rotor of an electric machine in relation to the stator, wherein the electric machine has at least three winding phases, which each have at least one pole winding with a magnetizable core, with devices for detecting a measurement signal. The instantaneous degrees of magnetization of the pole winding cores influenced by the magnetic field of the rotor, depend on the position of the rotor. The devices for detecting the measurement signal for tapping off the measurement signal are provided exclusively outside the electric machine at connecting conductors used for energizing the electric machine. Preferably, switching devices for temporarily isolating at least one of the connecting conductors from an operating voltage source are provided, wherein the measurement signal can be tapped off at the connecting conductor which has been isolated from the operating voltage source.

Abstract: A transducer is disclosed for detecting the AC and DC voltage difference between two nodes in an electrical circuit and electronically transmitting the measured voltage difference to an electrical system that is electrically isolated from the common mode potential of the two nodes. The voltage drop between two points in a circuit under test is determined by detecting the current flowing through a resistive shunt coil connected in parallel to the test points. Current through the resistive shunt coil is linearly proportional to the voltage difference between the test points, and it is detected by using a magnetic sensor that is separated from the shunt coil by an insulating dielectric barrier. The transducer can be packaged in a standard integrated circuit package in order to provide a small and low cost voltage transducer for test, measurement, control, and signal-isolation applications.

Abstract: The present invention discloses a 3D-IC differential sensing and charge sharing scheme which includes a plurality of TSVs including a first TSV and a second TSV. A tracking circuit is coupled to the first TSV. A sensing circuit is coupled to the second TSV and the tracking circuit. A plurality of equaling circuits are provided and wherein each of equaling circuit is configured and electrically connected between adjacent two equaling circuits. A clamping circuit is coupled to the first TSV.