A comparator is presented. The comparator includes an input port for receiving an input voltage; an output port for providing an output voltage; a resistive divider, first and second transistors, and a differential amplifier. The resistive divider has a first node for providing a first voltage and a second node for providing a second voltage. The first transistor has a control terminal coupled to the first node, a first terminal coupled to the input port, and a second terminal coupled to a common node. The second transistor has a control terminal coupled to the second node, a first terminal coupled to the input port, and a second terminal coupled to the common node. The differential amplifier has a first input coupled to the first terminal of the first transistor, a second input coupled to the first terminal of the second transistor and an output coupled to the output port.

A source measure device includes a current sampling circuit, a voltage sampling circuit, an overvoltage detecting circuit, and a comparing circuit. The current sampling circuit is configured to sample a current of a device under test. The voltage sampling circuit is configured to sample a voltage of the device under test. The overvoltage detecting circuit is coupled to the current sampling circuit and the voltage sampling circuit, and receives a first operation voltage of the current sampling circuit and a second operation voltage of the voltage sampling circuit so as to generate a detection voltage. The comparing circuit is coupled to the overvoltage detecting circuit, and determines whether the detection voltage is within a voltage range. If the detection voltage is not within the voltage range, the comparing circuit generates an abnormal signal.

Devices and methods for detecting a medical sensor device being attached to a host device are disclosed. The host device includes a reader circuit that can generate an AC pilot signal. When the medical sensor device is being attached to the host device, the AC pilot signal is fed to a non-linear circuit in the sensor device, which responds with a DC signal. The host device compares the magnitude of the response signal with a threshold magnitude. If the magnitude of the response signal is greater than the threshold magnitude, the host device determines that the sensor device is being attached and establishes connection with the sensor device.

A semiconductor device includes: a first input to which an input signal is input; a second input to which a reference signal is input; and a comparison stage which includes a current source connected to a first potential and first and second current path parts connected between the current source and a second potential different from the first potential and performing a comparison operation in response to the input signal and the reference signal, wherein the first and second current path parts respectively include first and second input circuits which are connected to the current source and first and second load circuits which are connected between the second potential and the first and second input circuits, wherein the first input circuit includes a first signal transistor and a first reference transistor, and wherein the second input circuit includes a second signal transistor and a second reference transistor.

The present disclosure relates to a control system and methods implemented on the control system. The control system includes a tuning/detuning system and a diagnosis system. The tuning/detuning system includes a first voltage source, a second voltage source, one or more coil arrays, and one or more tuning/detuning circuit drivers corresponding to the one or more coils arrays, respectively. The diagnosis system includes a first current sampling circuit and a processor. The first current sampling circuit is configured to obtain a first current. The processor is configured to diagnose the tuning/detuning system based on the first current.

An electronic device for the diagnosis of insulation loss of an energized electrical apparatus, with respect to a ground. The device includes a first resistance-switch group and a second resistance-switch group, connectable or disconnectable in a controlled manner, and also a first measurement circuit and a second measurement circuit, arranged in parallel to the first and second resistance-switch groups, respectively. The first and second measurement circuits include respective first and second detection circuits, first and second charge modulation circuits and first and second partition resistors (RB.sub.minus, RB.sub.plus). The first and second charge modulation circuits allow a dynamic switching measurement technique. Moreover, a method is described for measuring the insulation resistances (RI.sub.minus, RI.sub.plus) of an energized electrical apparatus with respect to ground, in which the method is carried out by a device according to the invention. Finally, a self-diagnosis method of device is described.

Circuitry for and methods of analyte measurement Circuitry for measuring a characteristic of an electrochemical cell, the circuitry comprising: a hysteretic comparator having a first comparator input, a second comparator input and a comparator output; a feedback path between the comparator output and the second comparator input configured to provide a feedback signal to the second comparator input; and a loop filter configured to apply filtering to the feedback path to generate the feedback signal, wherein the loop filter comprises the electrochemical cell.

A smart zipper includes a zipper, a voltage generator, a voltage detector, and a processor. The zipper includes a first left tooth and a first right tooth. The first left tooth is electrically connected to a first left wire and is supplied with a supply voltage. The first right tooth is electrically connected to a first right wire. The voltage generator generates the supply voltage. The voltage detector detects the voltage of the first right wire to generate a first detection signal. The processor determines first coupling information about whether the first left tooth is electrically connected to the first right tooth, according to the first detection signal.

An indicator device includes a housing configured to be coupled to positive and negative DC wire lines that supply power from an energy generation source to an inverter. The indicator device further includes a current sensor for measuring a current level on the positive and negative DC wire lines, and voltage sensors for measuring a first voltage across the positive and negative DC wire lines, a second voltage across the positive DC wire line and a ground terminal, and a third voltage across the negative DC wireline and the ground terminal. A circuit block compares the measured current level to one or more threshold current levels, and further compares the measured first, second and third voltages to one or more threshold voltage levels, and in response provides an output signal. A visual indicator receives the output signal from the circuit block, and in response provides a visual indication of whether voltage and current levels on the positive and negative DC wire lines are at levels that may harm humans.

Provided is a semiconductor device which is testable even with an inspection apparatus having low current drivability, and includes an output terminal which is also used as a test terminal and an output driver having high current drivability. The semiconductor device includes a plurality of voltage determination circuits connected to the output terminal of the semiconductor device, and have threshold values that are different from each other, an encoding circuit connected to the plurality of voltage determination circuits, and configured to output an encoded signal, and a mode switching circuit configured to output a mode signal to an internal circuit depending on the encoded signal and a signal from the internal circuit.