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 detection apparatus for unbalanced DC link capacitor voltage, the DC link provides a DC voltage and includes a plurality of capacitors coupled in series to two ends of the DC link and a plurality of balanced resistors coupled in series to two ends of the DC link and corresponding to the capacitors. The detection apparatus includes a plurality of sense resistors and a current sensor. One end of each sense resistor is coupled to a common-connected node of two capacitors, and the other end thereof is coupled to a common-connected node of two balanced resistors. The current sensor is coupled to one of the sense resistors and measures a current value of a current flowing through the sense resistor coupled to the current sensor.

A detection apparatus for unbalanced DC link capacitor voltage, the DC link provides a DC voltage and includes a plurality of capacitors coupled in series to two ends of the DC link and a plurality of balanced resistors coupled in series to two ends of the DC link and corresponding to the capacitors. The detection apparatus includes a plurality of sense resistors and a current sensor. One end of each sense resistor is coupled to a common-connected node of two capacitors, and the other end thereof is coupled to a common-connected node of two balanced resistors. The current sensor is coupled to one of the sense resistors and measures a current value of a current flowing through the sense resistor coupled to the current sensor.

The present disclosure provides apparatuses and methods for measuring power for a lighting control system. The present disclosure provides apparatuses and methods for measuring power for a lighting control system. The includes a lighting control module configured to cause a transmission of a quantity of electrical power to a lighting circuit of a light fixture electrically connected to the lighting control module, a detector circuit positioned in the lighting control module, and a controller in electrical communication with the detector circuit. The controller is specially programmed to correlate a quantity of electrical power transmitted to the lighting circuit to the response of the lighting circuit. The controller is further programmed to determine a power correction factor based on the correlation between the quantity of electrical power transmitted and the response. The power correction factor is configured to alter the response of the lighting circuit to a predetermined value.

The present disclosure provides apparatuses and methods for measuring power for a lighting control system. The present disclosure provides apparatuses and methods for measuring power for a lighting control system. The includes a lighting control module configured to cause a transmission of a quantity of electrical power to a lighting circuit of a light fixture electrically connected to the lighting control module, a detector circuit positioned in the lighting control module, and a controller in electrical communication with the detector circuit. The controller is specially programmed to correlate a quantity of electrical power transmitted to the lighting circuit to the response of the lighting circuit. The controller is further programmed to determine a power correction factor based on the correlation between the quantity of electrical power transmitted and the response. The power correction factor is configured to alter the response of the lighting circuit to a predetermined value.

Provided are an adapter and a charging method. The adapter includes: at least one filter capacitor (210) having a capacitance smaller than a predetermined threshold and configured to filter a rectified alternating current to obtain a pulsating direct current; and a voltage transformation module (220) configured to transform the pulsating direct current to obtain a voltage and a current for charging a device to be charged. The adapter for charging a battery is provided, the volume of the adapter can be reduced and the miniaturization of the volume of the adapter can be realized.

Provided are an adapter and a charging method. The adapter includes: at least one filter capacitor (210) having a capacitance smaller than a predetermined threshold and configured to filter a rectified alternating current to obtain a pulsating direct current; and a voltage transformation module (220) configured to transform the pulsating direct current to obtain a voltage and a current for charging a device to be charged. The adapter for charging a battery is provided, the volume of the adapter can be reduced and the miniaturization of the volume of the adapter can be realized.

Aspects of the invention include a circuit having a power header configured to couple to a power supply and to provide an output voltage. A sense circuit is coupled to the power header to receive the output voltage, the sense circuit including a replica voltage circuit coupled to a replica power header circuit and a transistor, the replica voltage circuit being configured to provide a replicated output voltage in accordance with the output voltage, the replica power header circuit being configured to couple to the power supply and the replicated output voltage to generate a replica current, the transistor being configured to deliver the replica current.

Aspects of the invention include a circuit having a power header configured to couple to a power supply and to provide an output voltage. A sense circuit is coupled to the power header to receive the output voltage, the sense circuit including a replica voltage circuit coupled to a replica power header circuit and a transistor, the replica voltage circuit being configured to provide a replicated output voltage in accordance with the output voltage, the replica power header circuit being configured to couple to the power supply and the replicated output voltage to generate a replica current, the transistor being configured to deliver the replica current.

The disclosure relates to accurately determining a DC energy signal, such as a DC current or DC voltage, which may be particularly useful when controlling a formation/testing current of a battery cell during formation and/or testing. In the battery formation/testing context, a current sensor is used to measure the current of the battery cell, which is used as a feedback signal for controlling the current to achieve a target current. The transfer function of the current sensor is used to improve the accuracy of the current measurement. Because the transfer function can be regularly determined during formation/testing, a lower-cost current sensor with relatively poor temperature coefficient may be used. Any change in the gain of the current sensor may be detected by the transfer function determination and corrected for. Therefore, high current control accuracy may be achieved at lower cost.