Electrical current flow in a ball grid array (BGA) package can be measured by an apparatus including an integrated circuit (IC) electrically connected to the BGA package. Solder balls connect the BGA package to a printed circuit board (PCB). A current sense loop can be fabricated on a wiring plane of the PCB to encircle a current supply via that supplies current to an IC mounted on the BGA package. A MUX/Sequencer can sequentially connect wires of the current sense loop to an amplifier. The amplifier can amplify a voltage induced on the current sense mesh by current flow into the BGA package. A sensing analog-to-digital converter (ADC) is electrically connected to convert a voltage at the output of the amplifier into digital output signals.

A power detector includes a detection circuit and a bias circuit. The detection circuit is used to receive an input signal and output a power indication signal. The bias circuit includes a first impedance unit, a second impedance unit and a transistor. The transistor includes a first terminal and a control terminal coupled to the first impedance unit, and a second terminal. The second impedance unit is coupled between the first terminal of the transistor and an output terminal of the bias circuit, or between the second terminal of the transistor and a second terminal of the bias circuit. The output terminal of the bias circuit is coupled to an input terminal of the detection circuit, and is used to output a bias signal.

A voltage detector comprises an input, a resistor divider circuit having resistors coupled in series with one another between the input and a reference node, and N intermediate nodes joining adjacent pairs of the resistors. The voltage detector has N switches coupled to the respective intermediate nodes, as well as a comparator with an input coupled to the switches, a state machine having an input coupled to the output of the comparator, and a decoder having N decoder outputs coupled to respective control terminals of the N switches.

A measurement device providing a graphical user interface (GUI) to a user on a remote terminal comprising at least one first processor; and at least one first memory including one or more first sequences of instructions to perform the steps of transmitting a GUI displaying a at least one of a first, a second, a third, and a fourth image in response to at least one of a voltage characteristic, a current characteristic, and a load characteristic obtained from the user through the GUI on the remote terminal. Then, the measurement device stores in a memory the at least one of the voltage characteristic, the current characteristic, and the load characteristic.

A measurement device providing a graphical user interface (GUI) to a user on a remote terminal comprising at least one first processor; and at least one first memory including one or more first sequences of instructions to perform the steps of transmitting a GUI displaying a at least one of a first, a second, a third, and a fourth image in response to at least one of a voltage characteristic, a current characteristic, and a load characteristic obtained from the user through the GUI on the remote terminal. Then, the measurement device stores in a memory the at least one of the voltage characteristic, the current characteristic, and the load characteristic.

The present invention discloses an AC impedance measurement circuit with a calibration function, which is characterized in that only one calibration impedance is needed, associated with a switch circuit. Based on the measurement results of the two calibration modes, an equivalent impedance of the switch circuit, circuit gain and phase offset can be calculated. Based on the above results, the equivalent impedance of the internal circuit is deducted from the measurement result of the measurement mode to accurately calculate an AC conductance and a phase of the AC conductance for impedance to be measured. In addition, by adjusting a phase difference between an input sine wave signal and a sampling clock signal, impedance of the same phase and impedance of the quadrature phase can be obtained, respectively, and the AC impedance and phase angle of the impedance to be measured can be calculated.

A shunt resistor is connected in series to a load. A differential amplifier circuit are inputted a first voltage that is generated at one end of the shunt resistor and a second voltage that is generated at the other end of the shunt resistor. The differential amplifier circuit outputs a third voltage equivalent to a sum of a reference voltage and a voltage obtained by performing differential amplification on the first voltage and the second voltage. A conversion circuit outputs the voltage obtained by performing differential amplification on the first voltage and the second voltage by removing the reference voltage from the third voltage. The voltage is proportional to a load current.

Systems, methods, and a computer readable medium are provided herein for providing an indication of a connection terminal on a measurement device for use in performing a test of a target device. The system can include a target device and a measurement device. The measurement device can couple to the target device via a plurality of connection terminals to perform a test of the target device. The measurement device can receive an input identifying a test to be performed on the target device by the measurement device. The measurement device can determine, based on the received input, an indication identifying at least one connection terminal of the plurality of connection terminals to connect to the target device to perform the test. The measurement device can provide the indication of the at least one connection terminal via an indication mechanism associated with the at least one connection terminal.

A current sensor sending an output to the outside through a connector does not affect the precision of the sensor even when an external connector is inserted or removed. The current sensor has a bus bar and a case housing part of the bus bar. The case has an open upper surface and a lid covering the upper surface. A circuit board is fixed to the case body with three caulking portions. The circuit board includes a fixed area enclosed by these caulking portions and an extended portion extending from two of these caulking portions. The lid is provided with two lid-side stoppers. Inside the case body, case-body-side stoppers are provided at three positions. When an external connector is connected to or removed from the connector, the warp of the extended portion is suppressed by the case-body-side stoppers and lid-side stoppers.

Systems, methods, and a computer readable medium are provided herein for providing an indication of a connection terminal on a measurement device for use in performing a test of a target device. The system can include a target device and a measurement device. The measurement device can couple to the target device via a plurality of connection terminals to perform a test of the target device. The measurement device can receive an input identifying a test to be performed on the target device by the measurement device. The measurement device can determine, based on the received input, an indication identifying at least one connection terminal of the plurality of connection terminals to connect to the target device to perform the test. The measurement device can provide the indication of the at least one connection terminal via an indication mechanism associated with the at least one connection terminal.