A circuit for power transmission through a single conductive element. The circuit includes an oscillator, a single conductive element, and a load. The oscillator is configured to generate a periodic voltage. The single conductive element is connected in series with the oscillator. The load is connected in series with the single conductive element. The load includes a first diode, a first resistor, and a first inductor. The first diode is connected in series with the single conductive element. The first resistor is connected in series with the first diode. The first inductor is connected between the first diode and the single conductive element. The first inductor is connected in series with the first resistor.

A voltage presence indicating system intended to be connected to a voltage measurement sensor for each phase of a high-voltage electrical network, a visual indicator representing the presence of the measured voltage, a first peak limiter having a first regulation voltage so as to deliver a first sinusoidal output signal representing the measured voltage and a second peak limiter having a second regulation voltage so as to deliver a second sinusoidal output signal representing the phase angle of the measured voltage, the second regulation voltage being higher than the first regulation voltage.

A method of operating a relaxation oscillator includes determining a measure of a propagation delay of a detection device of a relaxation oscillator and increasing a charging rate of a capacitor device of the relaxation oscillator for a time duration based on the determined measure of the propagation delay.

A circuit for power transmission through a single conductive element. The circuit includes an oscillator, a single conductive element, and a load. The oscillator is configured to generate a periodic voltage. The single conductive element is connected in series with the oscillator. The load is connected in series with the single conductive element. The load includes a first diode, a first resistor, and a first inductor. The first diode is connected in series with the single conductive element. The first resistor is connected in series with the first diode. The first inductor is connected between the first diode and the single conductive element. The first inductor is connected in series with the first resistor.

An electrical power supply system comprising: an electrical connector; a signal transmitter configured to send an electrical signal having a first voltage waveform to the electrical connector; a voltage measurement module configured to measure a second voltage waveform at the electrical connector; and controlling means comprising one or more processors configured to compare the shape of the second voltage waveform measured by the voltage measurement module with the shape of the first voltage waveform of the electrical signal; and control a transfer of electrical power to and/or from the electrical connector based on the comparison. The electrical signal may be an alternating current signal comprising two pulses, which may have equal duration and equal and opposite amplitude.

The present invention relates to a supply voltage detection device (1), in particular for at least one load, for monitoring a rectified mains voltage of a mains voltage supply (2) and for comparing a detected mains voltage value with a predetermined reference value, wherein, if the detected mains voltage value is lower than the reference value, switching to e.g. an emergency voltage of an emergency voltage supply can be effected by means of an electronic control system (3). In addition, if a voltage limit value has been exceeded, the rectified mains voltage can be fed to an optocoupler (4) and a signal can be transmitted by said optocoupler for the duration of this excess, a duty factor that is dependent on the mains voltage value being determinable from the duration and the period of said signal.

The present technology relates to a signal processing apparatus, a control method, an image pickup element, and an electronic appliance that achieve the suppression of an increase in electric power consumption. The signal processing apparatus may be configured to control an amount of electric current at a differential stage in a comparison unit that compares signal levels of a plurality of signals and reduce the amount of electric current for a period other than this comparison period. For example, the amount of electric current may be reduced by turning off part of a group of switches each capable of disconnecting a path of an electric current from an electric current source In addition, for example, the amount of electric current may be reduced by causing a gate potential at the electric current source unit to decrease. The present technology can be applied to, for example, an image pickup element and an electronic appliance.

The present specification relates to a power grid electric transient detector, a method of detecting a power grid electric transient, and an electric provisioning system detecting the power grid electric load. The power grid electric transient is estimated by receiving an electric parameter for electricity received from a power grid at a consuming facility. A digital filter extracts transient of the electric parameter. A processor analyzes the transients of the electric parameter and generates a power grid performance index based on the analyzed transient of the electric parameter.

A technique for managing undervoltage in a compute system is disclosed. The technique includes a method that further includes: detecting an AC undervoltage condition in the compute system; and upon detecting the AC undervoltage condition: dynamically determining a holdup time as a function of the present load; determining a monitoring period as a function of the dynamically determined holdup time; waiting for the determined monitoring period to expire; and upon expiration of the determined monitoring period, perform a shutdown process if the AC undervoltage condition persists.

A photovoltaic system, a relay detection method, and a power supply system. When a fault, for example, sticking of the relay is detected, the controller stops sending a PWM driver gating signal to the inverter, and stops driving of a switch transistor in the inverter, and the inverter stops outputting power, and then determines whether a voltage difference between two ends of the relay is greater than a preset value, to determine whether the relay is faulty. The controller stops sending the PWM driver gating signal to the inverter only within a preset phase range of a voltage of the filter capacitor, to ensure that the voltage of the filter capacitor has a large value. Because the voltage of the filter capacitor is large, an alternating current grid-to-ground voltage is pulled up, to avoid detecting the fault as an alternating current grid-to-ground short circuit.