An invention that reduces an influence of dv/dt noise generated by power switching elements around a Rogowski current sensor. By separating a coil into two coils and connecting voltages generated from the two coils in series in a reverse direction, a total amount of parasitic capacitance is reduced by ¼, and accordingly, Cp*dv/dt noise is reduced. The Rogowski sensor including a first coil (Coil-P) which detects a portion of a switching current passing through bus bars (20a, 20b) and includes a first end and a second end, and a second coil (Coil-P), as a coil separated from the first coil, which detects a portion of the switching current passing through the bus bar and includes a first end and a second end, wherein the second end of the first coil is connected to the second end of the second coil to form a neutral point (123).

A measurement circuit comprises an input terminal to receive a current signal, a first circuit branch coupled to the first terminal and including one or more circuit elements to receive a portion of the current signal, a second circuit branch coupled to the first terminal and including one or more additional circuit elements to receive another portion of the current signal, a nonlinear circuit element coupling the first circuit branch to the second circuit branch, and a quantization circuit configured to produce an input current measurement of current in the first and second circuit branches, and to include current in the second circuit branch in the input current measurement according to a magnitude of the input current signal.

A measuring device facilitates equipment calibration. A measuring device for measuring noise contained in equipment having a prescribed resistance value is provided with a first voltage-dividing circuit connected to a direct-current power source, a second voltage-dividing circuit connected in parallel with the first voltage-dividing circuit , and a measuring unit which measures a first voltage-divided voltage output from the first voltage-dividing circuit, and a second voltage-divided voltage output from the second voltage-dividing circuit, a calculating unit which calculates the difference between the measured first voltage-divided voltage and second voltage-divided voltage, and an output unit which outputs the calculated result, wherein: the first voltage-dividing circuit outputs the first voltage-divided voltage from the equipment and a first resistor, connected in series.

An apparatus and system for remote attestation of a power delivery network is disclosed. Embodiments of the disclosure enable remote attestation of the power delivery network by storing a trusted golden reference waveform in secure memory. The trusted golden reference waveform characterizes a power delivery network in response to a load generated on the power delivery network. A remote cloud server generates a server-generated remote attestation of the power delivery network by receiving an attestation packet from the power delivery network and verifying whether the attestation packet is consistent with an expected power delivery network identity.

An electronic circuit includes a first peak-hold circuit to output a peak surge voltage free of a ringing component included in a voltage at a voltage input node, a second peak-hold circuit to output a peak surge voltage on which the ringing component included in the voltage at the voltage input node is superimposed, and a subtractor to subtract an output voltage of the first peak-hold circuit from an output voltage of the second peak-hold circuit to output a voltage of the ringing component.

A voltage monitoring circuit monitors a magnitude relationship between a monitoring target voltage and a determination voltage and is capable of suppressing the influence of an offset of a reference voltage upon the determination voltage and setting the determination voltage as desired. The voltage monitoring circuit includes: an input terminal, applied with a monitoring target voltage or a divided voltage of the monitoring target voltage; a reference voltage generating circuit, generating a first reference voltage; a linear power circuit, converting the first reference voltage to a second reference voltage; a feedback resistor, generating a divided voltage of the second reference voltage, and negatively feeding back the divided voltage of the second reference voltage to the linear power circuit; and a comparing portion, comparing the second reference voltage with the monitoring target voltage or the divided voltage of the monitoring target voltage applied to the input terminal.

A discharge detection system of the present invention includes a current detection section configured to detect a value of current flowing in a circuit; a high pass filter configured to detect noise in a high frequency band superimposed on the circuit by a discharge phenomenon; and a determination section electrically connected to the current detection section and the high pass filter. The determination section executes steps including determining whether the discharge phenomenon has occurred based on the noise in the high frequency band detected by the high pass filter, when the discharge phenomenon is determined to have occurred, calculating an increase or decrease in the current value at the occurrence of the discharge phenomenon based on the current value detected by the current detection section, and specifying information on the discharge phenomenon based on the increase or decrease in the current value.

A method includes providing, by a signal source circuit of a sensing circuit, a signal to a sensor via a conductor. When the sensor is exposed to a condition and is receiving the signal, an electrical characteristic of the sensor affects the signal. The signal includes at least one of: a direct current (DC) component and an oscillating component. When the sensing circuit is in a noisy environment, transient noise couples with the signal to produce a noisy signal. The method further includes comparing, by a transient circuit of the sensing circuit, the noisy signal with a representation of the noisy signal. When the noisy signal compares unfavorably with the representation of the noisy signal, supplying, by the transient circuit, a compensation signal to the conductor. A level of the compensation signal corresponds to a level at which the noisy signal compares unfavorably with the representation of the noisy signal.

An inspection device includes a reference signal output section, a noise removal section, and an electrical characteristic measurement section. The reference signal output section is connected to an external power supply device in electrical parallel with a semiconductor sample, and outputs a reference signal according to the output of the external power supply device. The noise removal section outputs a noise removal signal obtained by removing a noise component of the output of the external power supply device from the current signal output from the semiconductor sample based on the reference signal. The electrical characteristic measurement section measures the electrical characteristic of the semiconductor sample based on the noise removal signal. The inspection device measures the electrical characteristic of the semiconductor sample to which a voltage is being applied by the external power supply device and which is being irradiated and scanned with light. The inspection device outputs a defective portion of the semiconductor sample based on the electrical characteristic.

System and methods for high accuracy, non-intrusive current sensing are provided. A system may include two magnetic field sensors configured for differential sensing. The system may further include frontend circuitry configured to remove direct current (DC) offset of the magnetic field sensors, upconvert the outputs of the magnetic field sensors, and filter out at least one frequency component from the up-converted signals. The system may receive output signals from the front-end circuitry corresponding to each sensor. The system may further calculate a differential signal based on the output signals. The system may apply optimal detection based on the differential signal and a reference signal to calculate a measurement of current flow. The system may determine a phase angle measurement between the differential signal and the reference signal to calculate a direction of the current flow in the conductor and output various measurement information related to the detected current.