JPS58137774A - Hall effect device - Google Patents
Hall effect deviceInfo
- Publication number
- JPS58137774A JPS58137774A JP57018941A JP1894182A JPS58137774A JP S58137774 A JPS58137774 A JP S58137774A JP 57018941 A JP57018941 A JP 57018941A JP 1894182 A JP1894182 A JP 1894182A JP S58137774 A JPS58137774 A JP S58137774A
- Authority
- JP
- Japan
- Prior art keywords
- hall
- hall element
- voltage
- control current
- current
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
- Hall/Mr Elements (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の職する技術分野〕
本発明はホール素子を用いて磁場を測定する装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to an apparatus for measuring a magnetic field using a Hall element.
ホール素子な用いて磁場を測定する場合、従来より第１
図の回路がよく用いられている。When measuring a magnetic field using a Hall element, conventionally the first
The circuit shown in the figure is often used.
ホール系子（υには電源α凌より制御電流ｌＨが供給さ
れ、その出力電圧ｖＩｉを差動増輪器峙で増幅している
。A control current lH is supplied to the Hall system element (υ) from a power supply α, and its output voltage vIi is amplified by a differential intensifier.
ところがホール素子には良く知られている様に、磁場Ｂ
が０め時でも出力電比が存在する、いわゆる不平衡電比
ＶＨＯが存在し、ｊｌ！２ａ！３の如く低磁場では大き
な誤差となった。However, as is well known in the Hall element, the magnetic field B
There is a so-called unbalanced voltage ratio VHO in which the output voltage ratio exists even when jl! 2a! 3, the error was large at low magnetic fields.
従ってボリウムＱ４１で不平衡電比ＶＭＯを補償してい
たが、温度が変化するとＶＭＯも変化し書ｉｗｍの必要
があり、完全な補償手段とは言えなかった。Therefore, the unbalanced electric ratio VMO was compensated for by the volume Q41, but when the temperature changed, the VMO also changed, and it was necessary to write IWM, so it could not be said to be a perfect compensation means.
本発明はホール素子の抵抗値を一定にするようにｊｌｌ
の制御電流をコントロールする手段と、かつ第２の制御
電流により磁場を検出する手段を設けることにより、ホ
ール系子の不平嚢亀圧及びホール電比の温度変化を補償
できるようにしたものである。The present invention is designed to keep the resistance value of the Hall element constant.
By providing means for controlling the control current of the second control current and means for detecting the magnetic field using the second control current, it is possible to compensate for temperature changes in the unbalanced capsular pressure and Hall electric ratio of the Hall system. .
以下図面によって本発明の詳細な説明する。 The present invention will be explained in detail below with reference to the drawings.
第３図は本発明のブロック図である。FIG. 3 is a block diagram of the present invention.
１Ｉｓ３図において、ホール素子ａｌｌ ４ｍにホール
抵抗制御回路−よりｌｘの制御電流ＩＨＤＣが印加され
、ホール素子６１１の抵抗値ＲＨは常に一定に保たれる
。1Is3, a control current IHDC of lx is applied from the Hall resistance control circuit to the Hall elements all 4m, and the resistance value RH of the Hall element 611 is always kept constant.
又ホール系子Ｃ１１ｌには交流電源−より第２の制御電
数１１４ＡＣも…加される。A second control voltage 114 AC is also applied to the Hall system element C11l from the AC power supply.
従ってホール電圧Ｖ）１はＩＨＤｃによるものと、ＩＭ
Ａｃ （二よるものの和であるが、ＩＨＤｃにょるホー
・ルミ比ＶＨＤＣはバイパスフィルターにより遮断され
、Ｉ、ムＣによるホール電圧Ｖ、ムＣだけが増−！！關
で増−される。Therefore, the Hall voltage V)1 is due to IHDc and IM
Ac (Although it is the sum of two factors, the Hall-luminance ratio VHDC due to IHDc is blocked by the bypass filter, and only the Hall voltage V due to I and MuC is increased.
ホール素子０１１は磁場わが零の時でも不平衡電圧ＶＨ
Ｄ、が存在するので、加算回路−で交流電蝕−と加算し
ＶｉｉＤを補償している。The Hall element 011 has an unbalanced voltage VH even when the magnetic field is zero.
Since D exists, the adder circuit adds it to the alternating current galvanic corrosion to compensate for ViiD.
第４図は本発明の具体的実施例である。FIG. 4 shows a specific embodiment of the present invention.
ホール索子Ｕυには抵抗の温度係数が正のＧａＡ１ホー
ル素子を使用するものとする。抵抗の温良係数が負のＩ
ｎ８ｂホール素子はホール素子の場合はホール素子とＲ
ｒｅ ｆの位置を父換すれはよい。It is assumed that a GaA1 Hall element having a positive temperature coefficient of resistance is used for the Hall element Uυ. The temperature coefficient of resistance is negative I
If the n8b Hall element is a Hall element, the Hall element and R
It is good to change the position of ref.
まずホール抵抗制御Ｉ！！ＩｕＵについて説明する。First, Hall resistance control I! ! IuU will be explained.
ホール素子−υにはオペアンプ（４２−８）の電圧とに
流［，１１（４：ｌの電比の和に比例した制御１浣が印
加される。A control voltage proportional to the sum of the voltage of the operational amplifier (42-8) and the electric ratio of current [, 11 (4:l) is applied to the Hall element -υ.
ホール索子１４υは抵抗（４２−１）〜（４２−３）と
共にブリッジの１辺を構成している。簡単の為、抵抗（
４２−１）と（４２−２）は同抵抗値とする。The Hall cable 14υ constitutes one side of the bridge together with the resistors (42-1) to (42-3). For simplicity, resistor (
42-1) and (42-2) have the same resistance value.
今鳩囲温度が上昇し、ホール索子Ｃ３１１り憾仇侭、Ｒ
，が抵抗（４２−３）の抵抗値Ｒｒａはり大きくなると
、Ｖ ａ ） Ｖ ｂとなりオペアンプ（４２−８入コ
ンデン気４２−９）で構成された積分器出力は上昇する
為、反転墳輪＠ （４２−１２）の出力は減少し、ホー
ル素子の自己消費電力は減少しホール素子の温度が下が
り、Ｒｈは小さくなる。Now, the temperature in the pigeonhole is rising, and Hall's C311 is in disgrace.
When the resistance value Rra of the resistor (42-3) increases, the output of the integrator composed of the operational amplifier (42-8 input capacitor 42-9) increases, so the integrator @ The output of (42-12) decreases, the self-consumption power of the Hall element decreases, the temperature of the Hall element decreases, and Rh decreases.
周囲温良が−Ｆがった場合は、１紀と全く逆の動作によ
りＲＨは人きくなる。When the ambient temperature is -F, the RH becomes more sensitive due to the completely opposite behavior to the first period.
このようにホール抵抗制御回路（ｔＪはホール索子の抵
抗ＲＨを常にｋｌｒｅ ｆに等しくするように働く。In this way, the Hall resistance control circuit (tJ) works to always make the resistance RH of the Hall cable equal to klref.
ホール素子０υのａ仇値、ＲＨが一定と菖う◆は、どい
かえればホール素子の１！良が一定という拳である。If the a value of the Hall element 0υ and RH is constant, ◆ is, in other words, 1 of the Hall element! It is a fist where good is constant.
ホール抵抗制御回路（６）においては、交＆電諒Ｉによ
る影４１ｋｌ、抵抗（４２−４）、（４２−５） 及
びコンデンサ（４２−６）、（４２−７）によるローパ
スフィルタにより交流分は遮断される為、はとんどない
。In the Hall resistance control circuit (6), the alternating current component is affected by the shadow 41kl due to the AC & electric current I, the low pass filter made of the resistors (42-4), (42-5), and the capacitors (42-6), (42-7). Since it is blocked, it is unlikely.
次にホールＸ比■Ｈは第１の制御電流１ｈｎｃ ４’−
よるホール電圧はバイパスフィルターで遮断される為、
増幅器（ハ）の出力ＶはＩ ＨＡＣに比例したホール電
圧ＶＨＡＣと不平負電圧ＶＭＯの和である。Next, the Hall X ratio ■H is the first control current 1hnc 4'-
Because the Hall voltage caused by this is blocked by the bypass filter,
The output V of the amplifier (c) is the sum of the Hall voltage VHAC proportional to IHAC and the unbalanced negative voltage VMO.
Ｖ＝に−ＩＭＡｃ−Ｂ＋ＶＨｏ、、、、、、■Ｖ）ｔｏ
は加算−路一により補償されて、Ｖｏｕｔは０式％式％
ここで￥肋はホール素子の温度が常に一定に保たれるの
で、ａｍ＆による影譬はなく完全に補償でさる。従って
従来のようにＰｋ１１ｉ１節する必要は全くない。V=ni-IMAc-B+VHo, , , , ■V)to
is compensated by addition-route one, and Vout is 0 formula % formula % Here, since the temperature of the Hall element is always kept constant, there is no influence due to am & and it is completely compensated. Therefore, there is no need to perform the Pk11i1 clause as in the conventional case.
又同様の理由でＶｏｕｔも！！＆によらず一定である。Also, Vout for the same reason! ! It is constant regardless of &.
以上説明したように本発明によれは第１の制御電流によ
りホール素子の抵抗値を一定にすることによってホール
素子の温度を一定に制御しているので、ホール素子の出
力Ｖ）１０は温度による影豐なく完全に補償でき、従来
のように再ｍ１１する必襞を全くなくすることができる
。As explained above, according to the present invention, the temperature of the Hall element is controlled to be constant by making the resistance value of the Hall element constant using the first control current, so the output V)10 of the Hall element depends on the temperature. It can be completely compensated without any influence, and there is no need to perform m11 again as in the conventional case.
ｉｓ１図は従来の磁場測定四路、第２図はその磁場−ホ
ール電圧特性図、第３図は本発明の一１ｋｃ＆例を示す
ブロック図、第４図は本発明の具体的実施例を示す図で
ある。
３１．４１・・・ホール素子、４２−８，４２−１２・
・・オペアンプ、３３．４３−５１ｔｌＬ電ｆｇ、３２
．４２−！に一ル抵抗制８１１１！ｌ路、３４ 、４４
・・・バイパスフィルタ、３５．４５・・・増幅器、３
６．４６・・・加算回路、４２−１〜４２−５．４２−
１０１４２−１１・・・紘４２−６ 、４２−７ 、４
２−９・・・コンデンサ代理人 弁理士 則 近 意
佑
（ほか１名）
第１図
第２図
第３図
：ドン
第４図
１＝ＪIS1 diagram shows a conventional four-way magnetic field measurement, FIG. 2 shows its magnetic field-Hall voltage characteristic diagram, FIG. 3 shows a block diagram showing one example of the present invention, and FIG. 4 shows a specific embodiment of the present invention. It is a diagram. 31.41... Hall element, 42-8, 42-12.
... operational amplifier, 33.43-51tlL electric fg, 32
．． 42-! Niichiru resistance system 8111! l road, 34, 44
...Bypass filter, 35.45...Amplifier, 3
6.46...Addition circuit, 42-1 to 42-5.42-
10142-11...Hiro 42-6, 42-7, 4
2-9...Capacitor agent patent attorney law
Yu (and 1 other person) Figure 1 Figure 2 Figure 3: Don Figure 4 1 = J
Claims (1)
電流として交流を印加し、第１の制御−流によりホール
素子の抵抗値を一定にならしめ、かつ第２の制御電流に
より磁界を検出する事を特徴とするホール効果装置。A direct current is applied as a first control current and an alternating current is applied as a second control current to the Hall element, the resistance value of the Hall element is made constant by the first control current, and the magnetic field is controlled by the second control current. Hall effect device characterized by detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57018941A JPS58137774A (en) | 1982-02-10 | 1982-02-10 | Hall effect device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57018941A JPS58137774A (en) | 1982-02-10 | 1982-02-10 | Hall effect device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58137774A true JPS58137774A (en) | 1983-08-16 |
Family
ID=11985662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57018941A Pending JPS58137774A (en) | 1982-02-10 | 1982-02-10 | Hall effect device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58137774A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982155A (en) * | 1989-06-29 | 1991-01-01 | Sprague Electric Company | Hall sensor with high pass hall voltage filter |
| US5119166A (en) * | 1990-02-06 | 1992-06-02 | Honeywell Inc. | Hall effect element aligned to reduce package-induced offsets |
| US5414349A (en) * | 1991-11-21 | 1995-05-09 | Kabushiki Kaisha Toshiba | Electronic watthour meter |
-
1982
- 1982-02-10 JP JP57018941A patent/JPS58137774A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982155A (en) * | 1989-06-29 | 1991-01-01 | Sprague Electric Company | Hall sensor with high pass hall voltage filter |
| US5119166A (en) * | 1990-02-06 | 1992-06-02 | Honeywell Inc. | Hall effect element aligned to reduce package-induced offsets |
| US5414349A (en) * | 1991-11-21 | 1995-05-09 | Kabushiki Kaisha Toshiba | Electronic watthour meter |
| US5475303A (en) * | 1991-11-21 | 1995-12-12 | Kabushiki Kaisha Toshiba | Electronic watthour meter |
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