Abstract: A current sense circuit for measuring a charge level of a battery is disclosure. The circuit comprising: a shunt resistor (R10) connected between a high side terminal of the battery and a load/charge terminal for connecting the battery to a load; translation circuitry arranged to produce a voltage across a pair of current sense terminals (GG_SRP, GG_SRN) in proportion to the voltage across the shunt resistor; wherein one of the current sense terminals (GG_SRP) is provided on a first current path connected at one end between the high side terminal of the battery and the shunt resistor (R10), and connected at the other end to ground, and the other of the current sense terminals (GG_SRN) is provided on a second current path connected at one end between the shunt resistor (R10) and the load/charge terminal, and connected at the other end to ground.

Abstract: A current sense circuit for measuring a charge level of a battery is disclosure. The circuit comprising: a shunt resistor (R10) connected between a high side terminal of the battery and a load/charge terminal for connecting the battery to a load; translation circuitry arranged to produce a voltage across a pair of current sense terminals (GG_SRP, GG_SRN) in proportion to the voltage across the shunt resistor; wherein one of the current sense terminals (GG_SRP) is provided on a first current path connected at one end between the high side terminal of the battery and the shunt resistor (R10), and connected at the other end to ground, and the other of the current sense terminals (GG_SRN) is provided on a second current path connected at one end between the shunt resistor (R10) and the load/charge terminal, and connected at the other end to ground.

Abstract: Control of supplying power to a storage device is performed based on carbon emission strength or a power rate. A battery center 13 that constitutes a storage device 11 performs radio communication with a gateway 4 and is controlled by the gateway 4. The gateway 4 collects a measured value of power consumed by electric appliances in a home and obtains the carbon emission strength in real time. A solar panel 9 is provided and a battery of the storage device 11 is charged with an output of the solar panel. The battery is also charged with direct current power obtained from power from outside. The power is stored in the storage device 11 based on the carbon emission strength by charging control.

Abstract: An inductive power transfer system comprises a primary unit 10, having a primary coil 12 and an electrical drive unit 14 which applies electrical drive signals to the primary coil so as to generate an electromagnetic field. The system also comprises at least one secondary device 30, separable from the primary unit and having a secondary coil 32 which couples with the field when the secondary device is in proximity to the primary unit. A control unit 16 causes a circuit including said primary coil to operate, during a measurement period, in an undriven resonating condition. In this condition the application of the drive signals to the primary coil by the electrical drive unit is suspended so that energy stored in the circuit decays over the course of the period. A decay measurement unit 18 takes one or more measures of such energy decay during the measurement period.

Abstract: An inductive power transfer system comprises a primary unit (10), having a primary coil (12) and an electrical drive unit (14) which applies electrical drive signals to the primary coil so as to generate an electromagnetic field. The system also comprises at least one secondary device (30), separable from the primary unit and having a secondary coil (32) which couples with the field when the secondary device is in proximity to the primary unit. A control unit (16) causes a circuit including said primary coil to operate, during a measurement period, in an undriven resonating condition. In this condition the application of the drive signals to the primary coil by the electrical drive unit is suspended so that energy stored in the circuit decays over the course of the period. A decay measurement unit (18) takes one or more measures of such energy decay during the measurement period.

Abstract: A magnetic transducer (109) for measuring the flow of a fluid (108) has electrodes (102) and an alternating magnetic field (107), an electrode (102) having lower noise energy at frequencies below 5 Hz than an electrode comprising carbon or corrosion-resistant metal alloy. The noise characteristic of the electrode (102) at magnetic field frequencies around 1 Hz is lower than that of an electrode comprising carbon or corrosion-resistant metal alloy.

Abstract: A circuit used to control the brightness of a number of light emitting diodes (LEDs) in an array, such that the color and brightness of the light produced by the array may be varied. The circuit is optimized to operate at high efficiency, permitting its use in confined spaces with poor cooling. The circuit permits a variety of configurations of LEDs to be controlled and driven from a range of line voltages. The circuit is further optimized to use few components to achieve its function.