Victor Company of Japan, Limited

Naritomo Takabatake

Hiroshi Nakamura

A current sensor has a Hall element, a differential amplifier that amplifying an output voltage of the Hall element, thus producing a sensor output voltage, and a compensation circuit that compensates for variation in offset voltage of the current sensor. The compensation circuit has a plurality of series-connected diodes each exhibiting specific temperature characteristics based on a gradient of an approximated straight line given by a relationship between a residual Hall voltage of the Hall element at a given temperature and a rate of change in the residual Hall voltage due to temperature change, to produce a compensation voltage in accordance with the temperature characteristics. The compensation voltage is added to the output voltage of the Hall element and input to the differential amplifier.

Current sensor

An electronic component has a casing having a resin injecting section having at least one wall. At least one circuit board is housed in the casing, next to the resin injecting section via the wall. At least one lead terminal is provided in the casing. The lead terminal has a first end and a second end, and a middle section connected between the first and second ends. The first end of the lead terminal is connected to the circuit board in a way that the middle section of the lead terminal is provided as straddling the wall of the resin injecting section. Also provided is at least one lead wire having a third end and a fourth end. The third end of the lead wire is connected to the second end of the lead terminal in the resin injecting section. The fourth end of the lead wire is pulled out from the casing. The third end of the lead wire and the second end of the lead terminal connected to each other are embedded in resin injected in the resin injecting section whereas the middle section of the lead terminal straddling the wall of the resin injecting section is not embedded in the resin. Instead of straddling the wall of the resin injecting section, the middle section of the lead terminal may be inserted into an opening provided on the wall and connected to the circuit board.

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Koriyama, Japan

Naritomo Takabatake