A system for processing a signal in a signal chain having decentralized embedded power management of components of the signal chain includes an input circuit to generate a measurement signal responsive to a stimulus, where the measurement signal is indicative of a characteristic of the stimulus. The system additionally includes a signal converter circuit coupled to the input circuit to convert the measurement signal to a digital signal according to a timing condition for capturing a sample of the measurement signal. The signal converter includes a control circuit to provide electrical power to the input circuit based on the timing condition and a sampling circuit to capture the sample of the measurement signal responsive to an indicator signal generated by the sensor circuit.

A system for processing a signal in a signal chain having decentralized embedded power management of components of the signal chain includes an input circuit to generate a measurement signal responsive to a stimulus, where the measurement signal is indicative of a characteristic of the stimulus. The system additionally includes a signal converter circuit coupled to the input circuit to convert the measurement signal to a digital signal according to a timing condition for capturing a sample of the measurement signal. The signal converter includes a control circuit to provide electrical power to the input circuit based on the timing condition and a sampling circuit to capture the sample of the measurement signal responsive to an indicator signal generated by the sensor circuit.

A system for processing a signal in a signal chain having decentralized embedded power management of components of the signal chain includes an input circuit to generate a measurement signal responsive to a stimulus, where the measurement signal is indicative of a characteristic of the stimulus. The system additionally includes a signal converter circuit coupled to the input circuit to convert the measurement signal to a digital signal according to a timing condition for capturing a sample of the measurement signal. The signal converter includes a control circuit to provide electrical power to the input circuit based on the timing condition and a sampling circuit to capture the sample of the measurement signal responsive to an indicator signal generated by the sensor circuit.

A switching power supply that has a reduced conduction loss, when a direct current power supply is connected as an input power supply, by changing a part of a circuit for alternating current-to-direct current conversion, is provided. The switching power supply includes power input terminals to which the direct current power supply or an alternating current power supply is connected; power output terminals configured to output electric power; a smoothing capacitor connected between the power output terminals; a first non-insulated chopper circuit connected between the power output terminals; a second non-insulated chopper circuit connected between the power output terminals; and a switching circuit configured to switch a connection circuit provided between the first non-insulated chopper circuit and the second non-insulated chopper circuit, and the power input terminals.

A switching power supply that has a reduced conduction loss, when a direct current power supply is connected as an input power supply, by changing a part of a circuit for alternating current-to-direct current conversion, is provided. The switching power supply includes power input terminals to which the direct current power supply or an alternating current power supply is connected; power output terminals configured to output electric power; a smoothing capacitor connected between the power output terminals; a first non-insulated chopper circuit connected between the power output terminals; a second non-insulated chopper circuit connected between the power output terminals; and a switching circuit configured to switch a connection circuit provided between the first non-insulated chopper circuit and the second non-insulated chopper circuit, and the power input terminals.

A switching power supply that has a reduced conduction loss, when a direct current power supply is connected as an input power supply, by changing a part of a circuit for alternating current-to-direct current conversion, is provided. The switching power supply includes power input terminals to which the direct current power supply or an alternating current power supply is connected; power output terminals configured to output electric power; a smoothing capacitor connected between the power output terminals; a first non-insulated chopper circuit connected between the power output terminals; a second non-insulated chopper circuit connected between the power output terminals; and a switching circuit configured to switch a connection circuit provided between the first non-insulated chopper circuit and the second non-insulated chopper circuit, and the power input terminals.

A switching power supply that has a reduced conduction loss, when a direct current power supply is connected as an input power supply, by changing a part of a circuit for alternating current-to-direct current conversion, is provided. The switching power supply includes power input terminals to which the direct current power supply or an alternating current power supply is connected; power output terminals configured to output electric power; a smoothing capacitor connected between the power output terminals; a first non-insulated chopper circuit connected between the power output terminals; a second non-insulated chopper circuit connected between the power output terminals; and a switching circuit configured to switch a connection circuit provided between the first non-insulated chopper circuit and the second non-insulated chopper circuit, and the power input terminals.

Provided are a method for controlling operation of a module level power electronics (MLPE) device, a method for controlling MLPE devices and a photovoltaic system. In the method for controlling operation of a MLPE device, if it is determined that a current of a photovoltaic string where the MLPE device is located is less than a current threshold and coding information sent by a converter in the photovoltaic system is not received for a first preset time period, an output voltage or an output power of the MLPE device is controlled to be less than a corresponding threshold.

A resonant power converter comprising electrical safety components comprising a combination of a diodes and a zener diodes coupled between DC conductors and an auxiliary switching circuit, the diodes being adapted to hinder the current from flowing from the auxiliary switching circuit to the negative DC conductor, and the zener diodes being adapted to allow current to flow from the negative DC conductor to the auxiliary switching circuit when the potential difference between the negative DC conductor and the phase conductor is above a threshold voltage. The Zener diodes being selected such that the threshold voltage of the Zener diodes is below the maximum blocking voltage of the transistors.

A resonant power converter comprising electrical safety components comprising a combination of a diodes and a zener diodes coupled between DC conductors and an auxiliary switching circuit, the diodes being adapted to hinder the current from flowing from the auxiliary switching circuit to the negative DC conductor, and the zener diodes being adapted to allow current to flow from the negative DC conductor to the auxiliary switching circuit when the potential difference between the negative DC conductor and the phase conductor is above a threshold voltage. The Zener diodes being selected such that the threshold voltage of the Zener diodes is below the maximum blocking voltage of the transistors.