Input power measuring device
View Patent ↗An input power measuring device includes a board with an edge connector, a first dual inline memory modules (DIMM) socket, a resistor, a differential amplifier circuit, a voltage dividing circuit, a display screen, and a controller. When the edge connector is inserted into a second DIMM socket of a motherboard and the motherboard is powered on, the resistor samples first current, and converts the first current into a first voltage. The differential amplifier circuit amplifiers the first current to a second current. The voltage dividing circuit divides the first voltage, and outputs a second voltage. The controller converts the second current into a third current, converts the second voltage into a third voltage, and calculates a power according to the third current and the third voltage.
1. An input power measuring device to measure an input power of a solid state drive (SSD), the input power measuring device comprising:
a board comprising an edge connector formed on a bottom side of the board;
a first dual inline memory modules (DIMM) socket mounted on the board to engage with the SSD; and
a measuring circuit arranged on the board, the measuring circuit comprising:
a resistor comprising a first terminal connected to a first power pin of the edge connector and a second terminal connected to a second power pin of the first DIMM socket, wherein when the edge connector is inserted into a second DIMM socket of a motherboard and the motherboard is powered on, the first power pin of the edge connector is connected to a third power pin of the second DIMM socket to receive first current from the motherboard, the resistor samples first current from the first power pin, and converts the first current into a first voltage;
a differential amplifier circuit connected between the first and second terminals of the resistor amplifies the first current to second current, and output the second current;
a voltage dividing circuit connected to the second terminal of the resistor divide the first voltage, and output a second voltage;
a controller connected to the voltage dividing circuit, the differential amplifier circuit, and the display screen, convert the second current into third current, convert the second voltage into a third voltage, and calculate a power according to the third current and the third voltage; and
a display screen mounted on the board display the power.
2. The input power measuring device of claim 1 , wherein the first DIMM socket is mounted on a top side of the board.
3. The input power measuring device of claim 2 , wherein two latching slots are defined in two opposite ends of the board to engage with the second DIMM socket, thereby fixing the board in the second DIMM socket.