Patent ID: 8624581

Claim:
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.