A current sensor includes an element that is in a high-resistance state when an absolute value of a current flowing between a first terminal and a second terminal is within a first range, and changes to a low-resistance state in which a resistance value is lower than that in the high-resistance state when the absolute value of the current exceeds the first range, and a circuit that supplies a current to be measured to the element, and senses a value of the current to be measured based on at least one of voltages of the first terminal and the second terminal.

A current sensor includes an element that is in a high-resistance state when an absolute value of a current flowing between a first terminal and a second terminal is within a first range, and changes to a low-resistance state in which a resistance value is lower than that in the high-resistance state when the absolute value of the current exceeds the first range, and a circuit that supplies a current to be measured to the element, and senses a value of the current to be measured based on at least one of voltages of the first terminal and the second terminal.

The invention relates to a method and a device for detecting a current in a measuring path, the current in said measuring path corresponding to a current in a power path. An electric current is detected by a current measuring instrument in the measuring path, while simultaneously part of the electric current is conducted parallel to the current measuring instrument by a bypass device, in order to reduce the load on the current measuring instrument.

A battery fuel gauge current sensing circuit includes: a sense unit coupled in series with the battery and configured to sense the battery current; a control unit configured to adjust the ON resistance of the sense unit based on the comparison of the voltage across the sense unit and a threshold voltage until the voltage across the sense unit is greater than the threshold voltage; and a sample unit coupled across the sense unit and configured to sample the voltage across the sense unit and to provide an analog sample voltage when the voltage across the sense unit is greater than the threshold voltage.

A current sensor for biomedical measurements includes: a first amplifier; a first capacitor; a second capacitor; a first switch connected in parallel with the first capacitor; a second switch connected in parallel with the second capacitor; a second amplifier; a third capacitor; a resistor; and a switched capacitor network. The first capacitor and the second capacitor are connected in series and across a first input and output of the first amplifier. The third capacitor and the resistor are respectively connected across a first input and output of the second amplifier. The switched capacitor network is connected between the output of the first amplifier and the first input of the second amplifier.

A self-calibrating current measuring apparatus comprising a low-range current sensor configured to generate first voltage signals, a high-range current sensor configured to generate second voltage signals, and a self-calibration current measuring circuit configured to: receive the first voltage signals and the second voltage signals, convert the first voltage signals and the second voltage signals into respective first digital signals and second digital signals, compare the first digital signals with the second digital signals, determine a difference between the first digital signals and the second digital signals exceed a recalibration threshold based on the comparison, generate calibration data based on the determination, and generate a digital output signal representative of a current reading based on an application of the calibration data to the second digital signals.

A hybrid current sensor (104, 204, 304, 404, 504, 554, 604, 624, 644, 664) may include a main conductor (206, 306, 406), having a first end (220) and a second end (222), wherein a current flow direction extends between the first end (220) and the second end (222), as well as a magnetic core (208, 308, 408), disposed at least partially around a middle portion of the main conductor (206, 306, 406). The magnetic core (208, 308, 408) may define a core gap region (226) above a first surface of the main conductor (206, 306, 406), where a chip assembly (218, 518, 618, 628) is disposed within the core gap region (226). As such, in a first portion the core gap region (226) has a first gap (G1) along a transverse direction, perpendicular to the current flow direction, and wherein in a second portion the core gap region (226) has a second gap (G2) along the transverse direction, greater than the first gap (G1).

A hybrid current sensor (104, 204, 304, 404, 504, 554, 604, 624, 644, 664) may include a main conductor (206, 306, 406), having a first end (220) and a second end (222), wherein a current flow direction extends between the first end (220) and the second end (222), as well as a magnetic core (208, 308, 408), disposed at least partially around a middle portion of the main conductor (206, 306, 406). The magnetic core (208, 308, 408) may define a core gap region (226) above a first surface of the main conductor (206, 306, 406), where a chip assembly (218, 518, 618, 628) is disposed within the core gap region (226). As such, in a first portion the core gap region (226) has a first gap (G1) along a transverse direction, perpendicular to the current flow direction, and wherein in a second portion the core gap region (226) has a second gap (G2) along the transverse direction, greater than the first gap (G1).

A control method of a semiconductor device includes inspecting an electrical property of a current detection circuit in the first semiconductor chip, writing information on a correction equation obtained on the basis of an inspection result in a memory circuit of the second semiconductor chip, and correcting, with the second semiconductor chip, a detection result obtained by the current detection circuit on the basis of the information on the correction equation.

A first resistor and a second resistor are coupled in series between a voltage source and an active load. When the current drawn by the active load exceeds a current threshold corresponding to a maximum admissible voltage drop across the first resistor, a stabilization current is delivered to the node common to the series coupled first and second resistors in such a way as to stabilize the voltage on the terminals of the active load at a threshold value. In the presence of such a current in excess of the current threshold, the current consumed by the active load is measured from the voltage drop across the second resistor. Conversely, if the current is less than the current threshold, the current consumed by the active load is measured from the voltage drop across the first resistor.