JPS6382366A - Current detector - Google Patents
Current detectorInfo
- Publication number
- JPS6382366A JPS6382366A JP61227612A JP22761286A JPS6382366A JP S6382366 A JPS6382366 A JP S6382366A JP 61227612 A JP61227612 A JP 61227612A JP 22761286 A JP22761286 A JP 22761286A JP S6382366 A JPS6382366 A JP S6382366A
- Authority
- JP
- Japan
- Prior art keywords
- output
- output signal
- circuit board
- amplifier
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 36
- 230000005294 ferromagnetic effect Effects 0.000 claims description 11
- 238000009966 trimming Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は１強磁性体コアに巻回したコイルに被検出直
流電流を流し、これによって変化する上記コアの磁気を
検出して直流電流を検出する電流検出器に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] This invention supplies a DC current to be detected through a coil wound around a ferromagnetic core, detects the changing magnetism of the core, and detects the DC current. The present invention relates to a current detector for detecting current.
第５図例えば実開昭５７−７３６６４号公報に示された
この種の従来の電流検出器を示す構成図である。FIG. 5 is a configuration diagram showing a conventional current detector of this type, as disclosed in, for example, Japanese Utility Model Application Publication No. 57-73664.
図において、（１）は円形状の強磁性体コアで２回周形
状を有する磁路の一部に磁気ギャップ（２）が設けられ
ている。この磁気ギャップ（２）内にはホール素子等の
感磁素子（３）が樹脂（４）で固定されて配設されてい
る。又１強磁性体コア（１１の磁路には被検出電流が流
れるコイル（５）が巻回されている。更に、感磁素子（
３）はリード線（６）によってコネクタ（７）と接続さ
れており、このコネクタ（７）には図示していないが、
増幅器なと信号処理回路の構成部品を実装した回路基板
が接続されている。そして、この回路基板に、コネクタ
（７）に嵌合する外部端子と出力信号の調整用可変抵抗
が取り付けられている。In the figure, (1) is a circular ferromagnetic core, and a magnetic gap (2) is provided in a part of a magnetic path having a two-turn shape. A magnetic sensing element (3) such as a Hall element is fixed in the magnetic gap (2) with a resin (4). In addition, a coil (5) through which a current to be detected flows is wound around the magnetic path of the first ferromagnetic core (11).
3) is connected to a connector (7) by a lead wire (6), and this connector (7) has a
A circuit board on which components of an amplifier and signal processing circuit are mounted is connected. An external terminal that fits into the connector (7) and a variable resistor for adjusting the output signal are attached to this circuit board.
上記構成において、コイル（５）に被検出電流が流れる
とその電流値に比例した大きさの磁界が磁気ギャップ（
２）に発生し、感磁素子（３）からその発生磁界に比例
した検出信号（電気信号）がリード線（６）及びコネク
タ（７）を通して出力される。この検出信号は１図外の
回路基板に入力され、増幅器によって増幅された後上記
被検出電流の検出信号として出力される。又２回路基板
に取り付けられた可変抵抗により感磁素子（３）からの
信号の増幅量の調整が行われるが、これは該検出器を電
流値を検出すべき被測定器に組み込んだ後、コイル（５
）に被検出電流を流して所望の出力が得られるように調
整される。In the above configuration, when a current to be detected flows through the coil (5), a magnetic field with a magnitude proportional to the current value is generated in the magnetic gap (
2), and a detection signal (electrical signal) proportional to the generated magnetic field is output from the magnetic sensing element (3) through the lead wire (6) and the connector (7). This detection signal is input to a circuit board (not shown in Figure 1), amplified by an amplifier, and then output as a detection signal of the current to be detected. In addition, the amount of amplification of the signal from the magneto-sensitive element (3) is adjusted by a variable resistor attached to the two circuit boards. Coil (5
) is adjusted so that the desired output is obtained.
〔発明が解決しようとする問題点〕
従来の電流検出器は以上のように構成されておシ、感磁
素子（３）と信号処理回路部品を実装した回路基板とが
別体となっているため、感磁素子（３）と回路基板をノ
イズ防止のためにツイストされたリード線（６）によっ
て接続しなければならず１部品点数が増えると共にその
取付作業及び管理が必要となるという問題点があった。[Problems to be solved by the invention] The conventional current detector is constructed as described above, and the magnetic sensing element (3) and the circuit board on which the signal processing circuit components are mounted are separate bodies. Therefore, the magnetic sensing element (3) and the circuit board must be connected using twisted lead wires (6) to prevent noise, which increases the number of parts and requires installation and management. was there.
この発明は、このような問題点を解消するためになされ
たもので０部品点数が少なく、接続用リード線の取付作
業及び管理が不要で、又出力調整が容易で環境の変化に
対しても出力信号の変動が少なく１組立後に最終調整の
必要のない電流検出器を得ることを目的としている。This invention was made to solve these problems, and has a small number of parts, eliminates the need for installation and management of connection lead wires, and is easy to adjust output and is resistant to changes in the environment. The purpose of this invention is to obtain a current detector that has little fluctuation in output signal and does not require final adjustment after one assembly.
この発明の電流検出器は、少くとも１回周形状を有する
磁路の一部に磁気ギャップが設けられた強磁性体コアと
、その磁気ギャップ内に配設された感磁素子からの検出
信号を増幅する増幅器とを備え、前記感磁素子を信号処
理回路が構成された回路基板に実装すると共に、この回
路基板に前記増幅器の出力と比較した出力信号の取出し
口とその増幅器の出力電圧と基準電圧を比較する比較器
の出力信号の取出口とを設けたものである。The current detector of the present invention includes a ferromagnetic core in which a magnetic gap is provided in a part of a magnetic path having at least one turn, and a detection signal from a magnetic sensing element disposed within the magnetic gap. The magneto-sensitive element is mounted on a circuit board on which a signal processing circuit is configured, and the circuit board is provided with an output port for an output signal compared with the output of the amplifier, and an output voltage of the amplifier. It is provided with an output port for the output signal of the comparator for comparing the reference voltage.
感磁素子はその出力信号の処理が行われる増幅器を有し
た回路基板に実装されているので、感磁素子と回路基板
を接続するリード線が不要となる。Since the magnetically sensitive element is mounted on a circuit board having an amplifier that processes its output signal, a lead wire connecting the magnetically sensitive element and the circuit board is not required.
又１回路基板には、増幅器の出力に比例した出力信号、
即ち、被検出電流に比例した出力信号の取出口と、その
増幅器の出力電圧と基準電圧を比較する比較器の出力信
号の取出口が設けられているので、出力調整が容易とな
り１機械的振動、湿度などの環境の変化に対しても出力
信号の変動が少すく、耐ノイズレベルの高く信頼性が向
上する。Also, on one circuit board, an output signal proportional to the output of the amplifier,
That is, since there are provided an output port for an output signal proportional to the current to be detected and an output port for the output signal of a comparator that compares the output voltage of the amplifier with the reference voltage, output adjustment is easy and mechanical vibrations are reduced. , the output signal fluctuates less due to changes in the environment such as humidity, and has a high level of noise resistance and improved reliability.
以下、この発明の実施例を図面について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図（ａ）、 （ｂ）はこの発明の一実施例の構造を
示す正面図及び側面図であり、従来の第５図と同一符号
は同−又は相当部分を示している。ホール素子あるいは
磁気抵抗素子等からなる感磁素子（３）は・信号処理機
能を有する回路を実装した回路基板（８）に他の部品と
共に一体に実装されている。この回路基板（８）に実装
された感磁素子（３）は１周状の強磁性体コアｔｌｌの
磁気ギャップ（２）内に位置するように配設され２強磁
性体コア（１）の面と回路基板（８）の面とがほぼ直角
に交叉している。そして、磁気ギャップ（２）内に発生
した磁界は感磁素子（３）により電気信号に変換され１
回路基板（８）上の回路によって信号処理され・検出信
号として外部端子（９）から出力されるようになってい
る。この外部端子（９）には。FIGS. 1(a) and 1(b) are a front view and a side view showing the structure of an embodiment of the present invention, and the same reference numerals as in the conventional FIG. 5 indicate the same or corresponding parts. A magnetically sensitive element (3), such as a Hall element or a magnetoresistive element, is integrally mounted with other components on a circuit board (8) on which a circuit having a signal processing function is mounted. The magnetically sensitive element (3) mounted on this circuit board (8) is arranged so as to be located within the magnetic gap (2) between the two ferromagnetic cores (1). The plane intersects with the plane of the circuit board (8) at almost a right angle. The magnetic field generated within the magnetic gap (2) is converted into an electric signal by the magnetic sensing element (3).
The signal is processed by a circuit on the circuit board (8) and output as a detection signal from an external terminal (9). For this external terminal (9).
電源用の入力端子も当然含まれている。又１強磁性体コ
ア（１）と回路基板（８）は、一体のケース本体と蓋か
らなる絶縁性のケースααに収容されて固定されている
。Naturally, an input terminal for power is also included. Further, the first ferromagnetic core (1) and the circuit board (8) are housed and fixed in an insulating case αα consisting of an integrated case body and lid.
そして、このケース（１αの外側から周状の強磁性体コ
ア（１）にコイル（５）が巻回されており、コイル（５
）の両端子圓はケースＣＩＧに機械的に止められている
。A coil (5) is wound around a circumferential ferromagnetic core (1) from the outside of this case (1α).
) are mechanically fixed to the case CIG.
更に、ケースａαには切欠部（窓）Ｑ３が設けられてお
り、ここから回路基板（８）上に実装されているトリミ
ングが可能な調整用抵抗α急を調整できるよりになって
いる。Further, the case aα is provided with a notch (window) Q3 through which the trimmable adjustment resistor α mounted on the circuit board (8) can be adjusted.
第２図は上記回路基板（８）上に構成された信号処理回
路の一例を示す回路構成図であり１図中、ｅｉはホール
素子等よりなる感磁素子（３）の出力電圧で。FIG. 2 is a circuit configuration diagram showing an example of a signal processing circuit configured on the circuit board (8), and in FIG. 1, ei is the output voltage of the magnetic sensing element (3) made of a Hall element or the like.
差動増幅器（１４１に印加されるものである。Ｒ４は差
動増幅器α〜の反転入力端子に接続された抵抗、Ｒ１は
差動増幅器（１４１の非反転入力端子とアース間に接続
された基準電圧設定用の抵抗である。又、ｃｏは差動増
幅器αＯの出力電圧で、外部端子（９）に接続されると
ともに、コンパレータ（比較器）α９の反転入力端子に
接続されている。Ｒ２，Ｒ，は電源とアース間に直列に
接続された固定抵抗及び調整用抵抗で。The voltage is applied to the differential amplifier (141). R4 is a resistor connected to the inverting input terminal of the differential amplifier α~, and R1 is the reference connected between the non-inverting input terminal of the differential amplifier (141) and ground. It is a resistor for voltage setting. Also, co is the output voltage of the differential amplifier αO, and is connected to the external terminal (9) as well as the inverting input terminal of the comparator α9. R2, R is a fixed resistor and an adjustment resistor connected in series between the power supply and ground.
その交点はコンパレータ西の基準電圧入力端子（非反転
入力端子）に接続され、基準電圧Ｖｒｅｆを設定してい
る。ｅｏはコンパレータ個の出力電圧である。The intersection is connected to the reference voltage input terminal (non-inverting input terminal) on the west side of the comparator, and sets the reference voltage Vref. eo is the output voltage of the comparator.
なお、前述した調整用抵抗０国はフィードバック用とし
て差動増幅器圓の出力抵抗と反転入力端子との間に接続
されており、調整用抵抗Ｒ１はトリミング用として設け
られている。又・差動増幅器圓の出力と比例した出力信
号の取出口と、その差動増幅器０４１の出力電圧と基準
電圧を比較するコンパレータαωの出力信号の取出口が
外部端子（９）として構成されている。Note that the above-mentioned adjusting resistor R1 is connected between the output resistor of the differential amplifier circle and the inverting input terminal for feedback, and the adjusting resistor R1 is provided for trimming. Further, an output port for an output signal proportional to the output of the differential amplifier circle and an output port for an output signal of a comparator αω that compares the output voltage of the differential amplifier 041 with a reference voltage are configured as external terminals (9). There is.
次に動作について説明する。Next, the operation will be explained.
強磁性体コア山の磁気特性、磁気ギャップ（２１の寸法
（間隙）、感磁素子（３）及び差動増幅器Ｉの特性等に
はバラツキがあり、このバラツキによって出力信号ｅ。There are variations in the magnetic properties of the ferromagnetic core pile, the dimensions (gap) of the magnetic gap (21), the characteristics of the magnetic sensing element (3), the differential amplifier I, etc., and these variations cause the output signal e.
はバラツキを持つ。そこで、このバラツキを所望の誤差
内に収めるため２回路基板（８）上の信号処理回路の一
部に調整用抵抗α３が設けられており、コイル（５）に
一定の被測定電流を流して出力電圧ｅ。を観察しながら
調整用抵抗叫によシトリミングを施し、その抵抗値を変
化させて上記バラツキを小さくする。即ち、上記出力電
圧ｅ。はで表されるので、調整用抵抗−の抵抗値を変え
ることにより出力を調整することができる。又、同様に
調整用抵抗Ｒ１にもトリミングを施してその抵抗値を変
化させることにより、所望の被測定電流値に対してコン
パレータα９の出力を反転させることができる。即ち、
基準大刀電圧（Ｖｒｅｆ）Ｆｉ値、■。は電源電圧）で
表されるので、調整用抵抗Ｒ。has variations. Therefore, in order to keep this variation within a desired error, an adjustment resistor α3 is provided in a part of the signal processing circuit on the second circuit board (8), and a constant current to be measured is passed through the coil (5). Output voltage e. Perform trimming using the adjustment resistance value while observing the resistance value, and reduce the above-mentioned variation by changing the resistance value. That is, the output voltage e. Since it is expressed as , the output can be adjusted by changing the resistance value of the adjustment resistor. Similarly, by trimming the adjustment resistor R1 and changing its resistance value, the output of the comparator α9 can be inverted with respect to a desired current value to be measured. That is,
Reference voltage (Vref) Fi value, ■. is the power supply voltage), so the adjustment resistor R.
の抵抗値を変えることによシ出カが調整可能となる。こ
のトリミングには、研摩粉の吹き付け・ もしくはレー
ザ光による方法等があり、調整後ケースα■の切欠部α
りは蓋あるいは樹脂をコーディングし、信頼性を向上さ
せることもできる。第３図は電流検出の際の動作特性を
示したものであり、出力電圧ｅｃｉ；ｔある閾値で反転
し、この時点で保磯回路が作動するようになっている。The output can be adjusted by changing the resistance value. This trimming can be done by spraying abrasive powder or using laser light, etc. After adjustment, the notch α of the case α■
The lid or resin can also be coated to improve reliability. FIG. 3 shows the operating characteristics during current detection, and the output voltage eci;t is inverted at a certain threshold value, at which point the protection circuit is activated.
このよつに感磁素子（３）を回路基板（８）に実装し。In this way, the magnetic sensing element (3) is mounted on the circuit board (8).
この回路基板（８）に被測定電流と比例関係をもつ出力
信号の取出口とその出力信号を基準信号と比較して得ら
れる保護用の出力信号の取出口とを設けているので、感
磁素子（３）と信号処理回路を接続するリード線が不要
となり２部品点数が減少すると共に取付作業及び管理が
容易となる。又、環境の変化に対しても安定した出力を
得ることかでさ。This circuit board (8) is provided with an output port for an output signal having a proportional relationship with the current to be measured and an output port for a protective output signal obtained by comparing the output signal with a reference signal. A lead wire connecting the element (3) and the signal processing circuit is not required, the number of parts is reduced by two, and installation work and management are facilitated. Also, it is important to obtain stable output even when the environment changes.
被測定電流に比例した制御用の出力信号と、基準値と比
較して得られる保護用の出力信号とが同時に得られ、安
価で精度の高いものが得られる。A control output signal proportional to the current to be measured and a protection output signal obtained by comparison with a reference value can be obtained at the same time, resulting in an inexpensive and highly accurate product.
第４図はこの発明の他の実施例を示す回路構成図である
。この実施例では、コンパレータ叫へ基準電圧を与える
調整用抵抗Ｒ３が回路基板（８）の外部に設けられてい
る。このように調整用抵抗Ｒ１を基板外に設けることに
より２機器に組込んだ後でも任意に出力調整を行うこと
が可能となる。FIG. 4 is a circuit diagram showing another embodiment of the present invention. In this embodiment, an adjustment resistor R3 that provides a reference voltage to the comparator is provided outside the circuit board (8). By providing the adjustment resistor R1 outside the board in this way, it becomes possible to arbitrarily adjust the output even after the device is incorporated into two devices.
尚２本発明Ｆｉ電流検出器を目的として、被測定電流が
流れるコイル又は貫通用の電線を含まない状態も対象と
している事は言うまでもない。2. It goes without saying that the Fi current detector of the present invention is also intended for a state in which there is no coil or through wire through which the current to be measured flows.
以上説明したように、この発明によれは１強磁性体コア
の磁気ギャップ内に配設される感磁素子を信号処理回路
の回路基板実装し、この回路基板に、検出信号に比例し
た出力信号の取出口とその出力信号を基準値と比較して
得られる出力信号の取出口とを設けｆｃ＊め、接続リー
ド線などの使用部品点数が減少し、その取付作業、管理
が不要となり、又出力調整が容易で環境の変化に対して
も出力信号の変動が少なく１組立後の最終調整が不要に
なるという効果があり、精度の高い制御用及び保護用の
出力信号の取出口を持ったものが安価に得られるという
効果がある。As explained above, according to the present invention, a magnetic sensing element disposed within the magnetic gap of one ferromagnetic core is mounted on a circuit board of a signal processing circuit, and an output signal proportional to a detection signal is mounted on the circuit board. By providing an outlet for the output signal obtained by comparing the output signal with the reference value, the number of parts used such as connection lead wires is reduced, and the installation work and management are no longer necessary. It is easy to adjust the output, the output signal does not fluctuate even with changes in the environment, and there is no need for final adjustment after one assembly, and it has output ports for highly accurate control and protection output signals. The effect is that things can be obtained at low prices.
第１図（ａ）、 （ｂ）はこの発明の一実施例を示す正
面図及び側面図、第２図は第１図の回路基板上に構成さ
れた信号処理回路の一例を示す回路構図図。
第３図はその動作特性を示す特性図、第４図はこの発明
の他の実施例を示す回路構成図、第５図は従来の電流検
出器の構成を示す構成図である。
（υ・・・強磁性体コア、（２）・・・磁気ギャップ、
（３）・・・感磁素子、（５）・・・コイル、（８）−
・・回路基板、０３・・・調整用抵抗、０す・・・差動
増幅器、０９・・・コンパレータ、Ｒ１・・・調整用抵
抗。
なお１図中同一符号は同−又は相当部分を示す。1(a) and 1(b) are a front view and a side view showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an example of a signal processing circuit configured on the circuit board of FIG. 1. . FIG. 3 is a characteristic diagram showing its operating characteristics, FIG. 4 is a circuit configuration diagram showing another embodiment of the present invention, and FIG. 5 is a configuration diagram showing the configuration of a conventional current detector. (υ...Ferromagnetic core, (2)...Magnetic gap,
(3)...Magnetic sensing element, (5)...Coil, (8)-
...Circuit board, 03...Adjustment resistor, 0S...Differential amplifier, 09...Comparator, R1...Adjustment resistor. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (3)
ャップが設けられた強磁性体コアと、その磁気ギャップ
内に配設された感磁素子と、少くともこの感磁素子から
の検出信号を増幅する増幅器とを備えた電流検出器にお
いて、前記感磁素子を信号処理回路が構成された回路基
板に実装すると共に、この回路基板に、前記増幅器の出
力と比例した出力信号の取出口と、その増幅器の出力電
圧と基準電圧を比較する比較器の出力信号の取出口とを
設けたことを特徴とする電流検出器。(1) At least a ferromagnetic core in which a magnetic gap is provided in a part of a magnetic path having a circular shape, a magnetic sensing element disposed within the magnetic gap, and at least a magnetic sensing element In the current detector, the magneto-sensitive element is mounted on a circuit board on which a signal processing circuit is configured, and an output signal proportional to the output of the amplifier is mounted on the circuit board. 1. A current detector comprising: an output port and an output port for an output signal of a comparator that compares the output voltage of the amplifier with a reference voltage.
抵抗の端子電圧が入力されることを特徴とする特許請求
の範囲第１項記載の電流検出器。(2) The current detector according to claim 1, wherein the comparator receives a terminal voltage of a trimming adjustment resistor as a reference voltage.
用抵抗の端子電圧が入力されることを特徴とする特許請
求の範囲第１項記載の電流検出器。(3) The current detector according to claim 1, wherein the comparator receives a terminal voltage of an externally provided adjustment resistor as a reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61227612A JPH0644015B2 (en) | 1986-09-26 | 1986-09-26 | Current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61227612A JPH0644015B2 (en) | 1986-09-26 | 1986-09-26 | Current detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6382366A true JPS6382366A (en) | 1988-04-13 |
| JPH0644015B2 JPH0644015B2 (en) | 1994-06-08 |
Family
ID=16863662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61227612A Expired - Lifetime JPH0644015B2 (en) | 1986-09-26 | 1986-09-26 | Current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0644015B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243661U (en) * | 1988-09-14 | 1990-03-26 | ||
| JPH0373418U (en) * | 1989-11-22 | 1991-07-24 | ||
| US5311587A (en) * | 1991-06-14 | 1994-05-10 | Murata Manufacturing Co., Ltd. | Sensor circuit for telephone line |
| JP2005345446A (en) * | 2004-06-07 | 2005-12-15 | Asahi Kasei Electronics Co Ltd | Current sensor and overcurrent protector |
| JP2009229133A (en) * | 2008-03-19 | 2009-10-08 | Sanyo Electric Co Ltd | Integrated circuit, semiconductor device, and electric apparatus |
| US8865339B2 (en) | 2007-03-30 | 2014-10-21 | Sony Corporation | Battery pack |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5682663U (en) * | 1979-11-30 | 1981-07-03 | ||
| JPS59151064A (en) * | 1983-02-18 | 1984-08-29 | Hitachi Ltd | Electric current detector |
-
1986
- 1986-09-26 JP JP61227612A patent/JPH0644015B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5682663U (en) * | 1979-11-30 | 1981-07-03 | ||
| JPS59151064A (en) * | 1983-02-18 | 1984-08-29 | Hitachi Ltd | Electric current detector |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243661U (en) * | 1988-09-14 | 1990-03-26 | ||
| JPH0373418U (en) * | 1989-11-22 | 1991-07-24 | ||
| US5311587A (en) * | 1991-06-14 | 1994-05-10 | Murata Manufacturing Co., Ltd. | Sensor circuit for telephone line |
| JP2005345446A (en) * | 2004-06-07 | 2005-12-15 | Asahi Kasei Electronics Co Ltd | Current sensor and overcurrent protector |
| US8865339B2 (en) | 2007-03-30 | 2014-10-21 | Sony Corporation | Battery pack |
| US9040195B2 (en) | 2007-03-30 | 2015-05-26 | Sony Corporation | Battery pack |
| US9882186B2 (en) | 2007-03-30 | 2018-01-30 | Sony Corporation | Battery pack including terminal portions at irregular intervals |
| US10756317B2 (en) | 2007-03-30 | 2020-08-25 | Sony Corporation | Battery pack including insertion guide groove with L-shaped opening |
| JP2009229133A (en) * | 2008-03-19 | 2009-10-08 | Sanyo Electric Co Ltd | Integrated circuit, semiconductor device, and electric apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0644015B2 (en) | 1994-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6570373B1 (en) | Current sensor programmable through connector | |
| US4727323A (en) | Magneto-resistive differential sensor system | |
| EP0133695A1 (en) | Sensing system for measuring a parameter | |
| KR100750439B1 (en) | Magnetic sensor | |
| US11199593B2 (en) | Magnetic sensor | |
| WO1998055834A1 (en) | Rotational speed sensor | |
| JPS6382366A (en) | Current detector | |
| US4907446A (en) | Flow sensor incorporating a thermoresistor | |
| US5103163A (en) | Current transducer | |
| JP5126536B2 (en) | Magnetic proportional current sensor gain adjustment method | |
| JP4249448B2 (en) | Capacitance meter calibration method, calibration standard capacity box, capacitance measurement method, capacitance measurement box and capacitance meter | |
| JPS59151064A (en) | Electric current detector | |
| JPS6318273A (en) | Current detector | |
| JPH0424453Y2 (en) | ||
| JPH01169369A (en) | Current detector | |
| JP2579194Y2 (en) | Current detector | |
| CN209117039U (en) | A kind of high output Hall integrated circuit | |
| JPS6361961A (en) | Current detector | |
| JP2001124802A (en) | Electric current sensor device | |
| JPS62148813A (en) | Magnetic sensor | |
| JP2516205B2 (en) | Current detector | |
| JP2518566Y2 (en) | Current detection circuit | |
| JP4613509B2 (en) | Rotational speed sensor | |
| JPH0810799Y2 (en) | Current sensor | |
| JPS62203390A (en) | Temperature compensating circuit for magnetic semiconductor element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |