Abstract: A vector network analyzer configured to analyze a high-frequency signal received is described. The vector network analyzer includes three or more reflectometers, each reflectometer operating at a respective frequency range and having a first terminal and a second terminal. The reflectometers are connected with each other in series such that a combined frequency range of the vector network analyzer is established. A first reflectometer is connected to one of a load or a signal source via its first terminal. A last reflectometer is connected to a test port via its second terminal. At least two reflectometers are interconnected with each other by an interposed frequency selective absorptive filter.

Abstract: An example position determining apparatus, includes a power source, position sensors, and a controller. The position sensors are each selectively powered by the power source and configured to provide a respective sensor reading indicating a proximity of a tracked object. The controller is configured to receive respective sensor readings from the position sensors and identify a position sensor that provided an extremum sensor reading. Based on the sensor readings, the controller selectively cause powering of certain position sensors and prevents powering of other position sensors. The position sensor that provided the extremum sensor reading is one of the powered position sensors. A position output based on the sensor readings is also provided.

Abstract: A method (200) and a connection test device (100; 300) for checking an intermittent impedance variation in a first and/or a second line (110; 302, 334) are described. The connection test device (100; 300) comprises a transmitter (102; 308) having a test signal generator (106) for generating a test signal and a first test point (108; 304) for connecting the first (110; 302) or the second line (334), wherein the test signal generator (106) supplies the test signal to the first (110; 302) or the second line (334) via the first test point (108; 304). The connection test device (100; 300) further comprises a first receiver (104; 310) having a second test point (112; 306, 336) for connecting the first (110; 302) or second line (334) and a receiver front end (114; 326, 328) which receives an incoming signal from the first (110; 302) or second line (334) via the second test point (112; 306, 336).

Abstract: Examples described herein provide a wearout card and a method for using the wearout card. The wearout card generally includes a first set of connectors configured to connect the testing apparatus to a testing controller, and a second set of connectors configured to connect the testing apparatus to a device under test (DUT). The wearout card can also include a memory configured to store identifying information of the testing apparatus and a use counter indicating a number of times different DUTs have been connected to the second set of connectors.

Abstract: A method for monitoring a line for a change in ambient conditions. The line includes a measurement line of a predetermined length which has a measuring conductor enclosed in an insulation with a known dielectric coefficient. An analog signal of defined frequency is generated and injected at a feed site. The signal is reflected at a predetermined reflection site and a resulting signal amplitude is measured at a defined measuring point. A measure for the ambient condition, particularly a temperature, is determined from the signal amplitude.

Abstract: A sectioned field effect transistor (“FET”) for implementing a rapidly changing sense range ratio dynamically in response to changing load and main supply conditions. The sectioned FET may have multiple main FET sections, and multiple sense FET sections. These sections can be dynamically connected and disconnected from the sectioned FET. The sections may also be connected by a common gate. There may also be common drain or source connections for the main FET sections, and also common drain or source connections for the sense FET sections. The sectioned FET allows for the sense range to be extended by a multiple of k+1, where k is the size ratio or factor of the additional sense FET sections. This allows the current sense range ratio to be extended to (m+n)/n*(k+1).

Abstract: An estimation apparatus estimates an internal state of an energy storage device having a positive electrode, a negative electrode including a negative active material that contains SiOx, and a nonaqueous electrolyte, the energy storage device changing from a positive-electrode limiting type, in which a discharge capacity is limited by the positive electrode, to a negative-electrode limiting type, in which the discharge capacity is limited by the negative electrode. The estimation apparatus estimates the internal state of the energy storage device by using a voltage value and an energization amount in a predetermined voltage range of the energy storage device or at a predetermined measured voltage value, or based on information on the shape of a discharge curve of the energy storage device.

Abstract: An electronic determination device for determining at least one characteristic parameter of a connection set connected between a converter and an electric machine; the converter comprising at least two output terminals and, for each output terminal, a switching branch including at least one converter switch; the connection set comprising a filter connected to the output terminals and a cable connected between the filter and the electric machine; the filter including, for each output terminal, a respective electromagnetic coil connected to said output terminal and a respective capacitor connected to said coil; the determination device comprising: for each output terminal, a device switch configured to be connected to the respective capacitor; a generation module configured to generate a voltage pulse through the connection set, by controlling the converter switches and each device switch; an acquisition module configured to acquire measurements of respective current(s) and voltage(s) through the filter, fur

Abstract: According to some embodiments, a method implemented in electronic circuitry includes: receiving a first signal having a sinusoidal waveform; receiving a second signal having a sinusoidal waveform; generating a composite signal responsive to the first and second signals; determining an orthogonality adjustment coefficient based on a duty cycle of the composite signal; and applying the orthogonality adjustment coefficient to generate an adjusted second signal that is substantially orthogonal to the first signal.

Abstract: Systems and methods to estimate trapped charge for a controlled automatic reclose are described herein. For example, an intelligent electronic device (IED) may calculate an analog amount of trapped charge of each phase of a power line based on voltage measurements of the power line. The IED may close a switching device of each phase at a time corresponding to a point-on-wave associated with the analog amount of trapped charge of the respective phase.

Abstract: An evaluation method is for evaluating a charging connector in coolability by connecting an evaluation jig to the charging connector, the charging connector including a pair of male terminals and a bottom wall, the evaluation jig including a pair of female terminals, the pair of female terminals being connected to the pair of male terminals in evaluating the charging connector in coolability. The method comprises: connecting the pair of female terminals to the pair of male terminals; and adjusting a connection state of the terminals so that contact resistance between the terminals falls within a prescribed range. In the step of adjusting, a resistance between a point of 4.5 mm of the male terminal from a surface of the bottom wall and a point of 43 mm of the female terminal from the surface of the bottom wall is measured as the contact resistance.

Abstract: A scale includes a plurality of conductors that are arrayed in a given interval along a measurement axis, wherein each of the plurality of conductors has projection portions, each of which projects toward each side of the measurement axis, and wherein at least a part of each of the projection portions has a curve projecting in the measurement axis.

Abstract: A current detection apparatus includes a voltage detector, a candidate voltage generator, a temperature detector and a correction voltage selector. The voltage detector includes an output terminal for outputting a detected voltage according to a load current. The candidate voltage generator includes correction resistors connected in series and connecting the output terminal and a ground. The candidate voltage generator generates candidate voltages at respective sections across the corresponding correction resistors. The temperature detector detects a temperature of a semiconductor switch. The correction voltage selector selects one of the candidate voltages as a corrected voltage. The one of the candidate voltages is weighted with corresponding one of the corrected magnification scales corresponding to an on-resistance of the semiconductor switch at the measured temperature. The corrected voltage indicates a corrected current value with correction of the load current according to the measured temperature.

Abstract: The present disclosure is directed to measuring impedance across a plurality of electrode pairs. The disclosed systems and methods may simultaneously provide drive signals between electrode pairs and then sense the voltage signals that develop at the electrodes. Digital signal processing may be used to synchronously demodulate the voltage signal at each electrode to determine impedances at the electrodes. Each electrode pair may be driven at a unique frequency to allow for significantly increasing a number of electrode pairs and/or increasing drive current magnitudes. Synchronous demodulation allows the unique frequencies to be detected independent of each other while minimizing crosstalk. Typically, the drive frequencies are made orthogonal by setting the drive frequencies at harmonics of a common base frequency and measuring a response over an integer number of cycles.

Abstract: A detection circuit, including a first connecting terminal, an SPI bus, and a security component, is provided. The first connecting terminal is configured to be detachably connected to the main board. The security component is coupled to the first connecting terminal and the SPI bus. The security component forms a first loop with the main board, and is configured to detect a loop state of the first loop. The security component locks the SPI bus when the first loop is being detected by the security component to be disconnected.

Abstract: A method of calibrating a setup comprises: performing at least one calibration of the setup, thereby obtaining calibration data; setting a quantity representing forward tracking to be equal with a quantity representing reverse tracking; solving a system of equations having at least an unknown quantity representing the forward tracking or the reverse tracking, thereby obtaining at least one equation having the unknown quantity squared; creating based on the calibration data obtained two phase over frequency relationships for the respective quantity; determining two lines having a linear change in phase over frequency for the phase over frequency relationships created; extrapolating the lines determined to a frequency of 0 Hz; and determining the respective quantity by selecting one line of the lines extrapolated that is closer to a phase of zero, 2? or a multiple thereof at the frequency of 0 Hz.

Abstract: A trailer tow connector including: at least one set of terminals for coupling to corresponding terminals of a trailer connector; a cover having a closed position for covering the terminals and an open position for providing access to the terminals for connecting corresponding terminals of the trailer connector thereto; a magnet coupled to the cover; and a magnetic field sensor, the magnetic field sensor being configured to provide a first output when the cover is in the closed position and a second output different from the first output when the cover is in an open position.

Abstract: The invention generally relates to LED lighting fixtures and provides apparatuses and methods for determining the forward voltage of a light emitting diode or light emitting diode array in a light fixture. An example apparatus comprises a boost converter with a user-variable forward bias current, that measures and displays the characteristics of an arbitrary LED load. Example methods according to the invention use a configurable boost converter apparatus in the field to determine the LED characteristics of an arbitrary LED module in a lighting fixture and subsequently display the results to the user. The apparatus can be part of a system that includes a link to a mobile device to transmit operating characteristics of the LED load and retrieve pertinent commercial data.

Abstract: A receptacle includes a pair of spare terminals that are located on both sides of a plurality of receptacle terminals in a longitudinal direction and are short-circuited. A plug includes a pair of relay electrodes that respectively come in contact with the pair of spare terminals when the plug is connected to the receptacle. A connector inspection instrument includes a conduction detecting circuit and a pair of terminal support portions supporting a pair of inspection terminals, and a displacement mechanism. The displacement mechanism supports one or both of the pair of terminal support portions in such a way as to displace the one or both of the pair of terminal support portions in a width direction to narrow or widen an interval between the pair of inspection terminals.

Abstract: A motor driving device includes an acquisition unit configured to acquire multiple pieces of data in data acquisition periods having different lengths; a selection unit configured to select a piece of data from among the multiple pieces of data, based on timing at which a switching circuit switches switching devices; and a control unit configured to control the switching circuit based on the selected data.