In some embodiments, a threshold calibration system to provide a zero voltage switching signal is presented. The system includes a divider coupled to a switching node; a calibration ramp generator; a reference voltage generator; a comparator; a first multiplexer coupled to receive a divider output signal from the divider and a calibration ramp signal from the calibration ramp generator and provide a signal to the comparator based on a calibration enable signal; a second multiplexer coupled to receive reference voltages from the reference voltage generator, the second multiplexer provided a threshold signal to the comparator; and a digital feedback circuit receiving an output signal from the comparator and providing the zero voltage switching signal.

A combination of a conductor, such as a busbar, and a device for measuring the AC voltage in the conductor, which device includes: an insulation layer arranged on the conductor; a capacitor plate arranged on the insulation layer and configured to position the capacitor plate at a fixed distance from the conductor to form a first capacitor; a second capacitor arranged electrically between the capacitor plate and ground to provide a capacitive voltage divider with the first capacitor; and a voltage measurer for measuring the voltage at the capacitor plate, the voltage measurer including a frequency measurer for measuring the frequency of the voltage in the conductor and an AC voltage calculator for calculating the AC voltage in the conductor based on the capacities of the first and second capacitors, the measured voltage, and the measured frequency.

An electrical assembly may include a plurality of batteries, a switch assembly including a plurality of switches, one or more loads, a sensor, and an electronic control unit (ECU). A method of operating and electrical assembly may include providing power from at least one of the plurality of batteries to the one or more loads, decoupling a switch from the plurality of batteries and/or the one or more loads, and/or testing, via a simulation unit connected to the ECU, the decoupled switch. Testing may be conducted while the one or more loads are operating. The one or more loads may include an electric motor of a vehicle. Operating the one or more loads may include moving said vehicle via said electric motor while testing the decoupled switch. Testing may include providing at least one of an under-voltage and over-voltage condition to a sensor associated with the decoupled switch.

A detection apparatus is for detecting interference on signal paths in a differential voltage measuring system with a signal measuring circuit for measuring bioelectric signals with a number of useful signal paths having at least one shield. In an embodiment, the detection apparatus includes at least one analysis unit, connected to the shield and embodied to detect interference in a useful signal path of the voltage measuring system via a signal measured at the shield in the case of interference.

A probe for an electrical testing device has an independently powered integrated light source. The probe has a plurality of lights oriented in a cross-like configuration and housed in a recessed surface of the probe. The plurality of lights projects light beams that extend toward the tip of the probe and illuminate the area directly in front of the tip from 360 degrees. The integrated light source is connected to a power source that is housed in the probe but is independent from the power source used for the electrical testing device.

An isolated switched-mode power converter converts power from an input source into power for an output load. A digital controller senses a secondary-side voltage, such as a rectified voltage, of the power converter. The secondary-side voltage is divided down using a high-impedance voltage divider. The resultant divided-down voltage is provided to a voltage sensor within the digital controller. The voltage sensor level shifts the provided voltage, and buffers the resulting level-shifted voltage. The buffered, level-shifted voltage is provided to a tracking analog-to-digital converter (ADC) for digitization. The buffered signal provided to the tracking ADC has a high current capability, such that the voltage input to the tracking ADC may quickly converge before the tracking ADC outputs a digital value for the sensed secondary-side voltage.

Systems and methods are provided for measuring electrical parameters in an insulated conductor without requiring a galvanic connection. A non-contact, electrical parameter sensor probe may be operative to measure both current and voltage in an insulated conductor. The sensor probe includes a body, a Rogowski coil coupled to the body, and a non-contact voltage sensor coupled to the body or the Rogowski coil. The size of the loop of the Rogowski coil is selectively adjustable, such that the loop may be tightened around the conductor under test until the conductor is positioned adjacent a portion of the body or Rogowski coil that includes the non-contact voltage sensor. Measured electrical parameters may be provided to a user, e.g., via a display, or may be transmitted to one or more external systems via a suitable wired or wireless connection.

A voltage detection circuit for a charge pump is disclosed. The voltage detection circuit includes a sampling circuit and a latch circuit. The sampling circuit is configured to sample a supply voltage and provide the latch circuit with a sampled voltage. The latch circuit is configured to detect the sampled voltage and latch a result of the detection. And the latch circuit is connected to a voltage regulation circuit which is configured to regulate a charge-pump cascade structure in the charge pump based on the result of the detection so as to maintain an output voltage of the charge pump stable.

An isolated switched-mode power converter converts power from an input source into power for an output load. A digital controller senses a secondary-side voltage, such as a rectified voltage, of the power converter. The secondary-side voltage is divided down using a high-impedance voltage divider. The resultant divided-down voltage is provided to a voltage sensor within the digital controller. The voltage sensor level shifts the provided voltage, and buffers the resulting level-shifted voltage. The buffered, level-shifted voltage is provided to a tracking analog-to-digital converter (ADC) for digitization. The buffered signal provided to the tracking ADC has a high current capability, such that the voltage input to the tracking ADC may quickly converge before the tracking ADC outputs a digital value for the sensed secondary-side voltage.

A transmission interface module includes a receiving unit, a transmitting unit, a multiplexer, and a processing unit. An output terminal and a control terminal of the receiving unit are electrically connected to the processing unit. The input terminal and the control terminal of the transmitting unit are electrically connected to the processing unit, and the control terminal of the multiplexer is electrically connected to the processing unit. The transmission interface module respectively adjusts a turn-on state or a turn-off state of the analog power terminal, the digital power terminal, the processing unit, the receiving unit, the transmitting unit, and the multiplexer through a plurality of operation modes to transmit the detecting signals.