JP2929628B2 - Magnetic field trimming method - Google Patents
Magnetic field trimming methodInfo
- Publication number
- JP2929628B2 JP2929628B2 JP1341530A JP34153089A JP2929628B2 JP 2929628 B2 JP2929628 B2 JP 2929628B2 JP 1341530 A JP1341530 A JP 1341530A JP 34153089 A JP34153089 A JP 34153089A JP 2929628 B2 JP2929628 B2 JP 2929628B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic sensor
- magnetic
- voltage
- magnetic field
- resistor
- 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.)
- Expired - Fee Related
Links
Landscapes
- Parts Printed On Printed Circuit Boards (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は印刷抵抗のトリミング方法に関するもので
あり、特に、磁気センサの特性のばらつきを考慮した磁
界トリミング方法に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of trimming a printed resistor, and more particularly to a method of trimming a magnetic field in consideration of variations in characteristics of a magnetic sensor.
［従来の技術］ 従来、此種印刷によって抵抗を形成した回路基板は、
印刷焼成した抵抗に電圧を印加して抵抗値を測定しなが
ら、レーザトリミングによつて所望の抵抗値に調整する
所謂フアンクシヨントリミングを行っている。磁気セン
サを有する回路基板に於ても、前述と同様にして印刷抵
抗をフアンクシヨントリミングしている。[Prior art] Conventionally, a circuit board formed with a resistor by this kind of printing is:
While applying a voltage to the printed and fired resistor to measure the resistance value, so-called function trimming is performed to adjust the resistance value to a desired value by laser trimming. In the circuit board having the magnetic sensor, the print resistance is function trimmed in the same manner as described above.
［発明が解決しようとする課題］ 前述した従来のフアンクシヨントリミングでは、磁気
センサを有する回路基板の場合にはトリミングを行う抵
抗にのみ電圧を印加し、磁気センサは不動作の状態にし
てトリミングを行うため、磁気センサの特性のばらつき
が直接影響を及ぼして、磁気センサが作動したときの印
刷抵抗の抵抗値に誤差が生じて動作不良を起こすことが
ある。[Problems to be Solved by the Invention] In the above-mentioned conventional function trimming, in the case of a circuit board having a magnetic sensor, a voltage is applied only to a resistor to be trimmed, and the magnetic sensor is disabled to perform trimming. Therefore, variations in the characteristics of the magnetic sensor directly affect the magnetic sensor, and an error may occur in the resistance value of the print resistor when the magnetic sensor operates, resulting in malfunction.
そこで、磁気センサの特性のばらつきを考慮して安定
した動作を行う回路基板にすべく、正確にフアンクシヨ
ントリミングを行うために解決せられるべき技術的課題
が生じてくるのであり、本発明はこの課題を解決するこ
とを目的とする。Therefore, in order to make the circuit board that performs stable operation in consideration of the variation in the characteristics of the magnetic sensor, there arises a technical problem to be solved in order to accurately perform the function trimming. The purpose is to solve this problem.
［課題を解決するための手段］ この発明は上記目的を達成するために提案せられたも
のであり、磁気センサを有する回路基板に於て、該磁気
センサと印刷抵抗の夫々各別に電圧を印加し、該磁気セ
ンサと印刷抵抗を通過した夫々の電流電圧をコンパレー
タに入力し、該コンパレータにて双方の電流電圧を比較
し、該磁気センサの磁力に対応すべく該印刷抵抗をファ
ンクショントリミングすることを特徴とする磁界トリミ
ング方法を提供せんとするものである。Means for Solving the Problems The present invention has been proposed to achieve the above object, and in a circuit board having a magnetic sensor, a voltage is applied to each of the magnetic sensor and the print resistor. Inputting the respective current voltages passing through the magnetic sensor and the print resistor to a comparator, comparing the two current voltages with the comparator, and performing function trimming of the print resistor to correspond to the magnetic force of the magnetic sensor. The present invention provides a magnetic field trimming method characterized by the following.
［作用］ この発明は磁気センサと印刷抵抗の各別に電圧を印加
する。該磁気センサは該電圧を印加した状態で磁石を感
知するとき、該磁気センサの抵抗値は磁界の強弱によっ
て変化する。而して、該磁気センサ及び印刷抵抗を通過
した各電流電圧はコンパレータに入力される。該コンパ
レータは各入力された電流電圧を比較し、その結果を制
御部に送って磁界の強さを演算し乍ら前記印刷抵抗をフ
ァンクショントリミングし、最良の動作状態になるよう
に該印刷抵抗を調整することができる。[Operation] In the present invention, a voltage is applied to each of the magnetic sensor and the printing resistor. When the magnetic sensor senses the magnet with the voltage applied, the resistance of the magnetic sensor changes according to the strength of the magnetic field. Thus, each current and voltage that has passed through the magnetic sensor and the printed resistor is input to the comparator. The comparator compares each input current and voltage, sends the result to a control unit, calculates the strength of the magnetic field, performs function trimming of the printed resistor, and adjusts the printed resistor to obtain the best operating condition. Can be adjusted.
［実施例］ 以下、この発明の一実施例を別紙添付図面に従って詳
述する。符号（１）は磁気センサであり、InSb等の半導
体素子を素材にして形成され、磁界の影響によつて抵抗
値が変化する特性を有している。符号（２）はトリミン
グされるべき印刷抵抗であり、前記磁気センサ（１）
（１）及び印刷抵抗（２）（２）をコンパレータ（３）
に接続して出力している。この回路は、磁気センサ
（１）（１）に電圧を印加した状態で磁力（点線矢印）
を感知したときは該磁気センサ（１）（１）の抵抗値が
磁界の強弱によつて変化し、印刷抵抗（２）（２）を通
過した電流電圧と該磁気センサ（１）（１）を通過した
電流電圧とをコンパレータ（３）によつて比較する。そ
して、その結果を制御部（図示せず）に送って磁界の強
さを演算するものである。Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Reference numeral (1) denotes a magnetic sensor, which is formed using a semiconductor element such as InSb as a material, and has a characteristic that a resistance value changes under the influence of a magnetic field. Reference numeral (2) denotes a printing resistor to be trimmed, and the magnetic sensor (1)
(1) and the printed resistors (2) and (2) are compared with a comparator (3)
Connected to and output. This circuit uses a magnetic force (dotted arrow) with a voltage applied to the magnetic sensors (1) and (1).
Is detected, the resistance of the magnetic sensors (1) and (1) changes according to the strength of the magnetic field, and the current and voltage passing through the printed resistors (2) and (2) and the magnetic sensors (1) and (1) Is compared with the current voltage passing through the comparator (3). Then, the result is sent to a control unit (not shown) to calculate the strength of the magnetic field.
本発明は印刷抵抗（２）（２）をフアンクシヨントリ
ミングするに当り、磁気センサ（１）（１）に予め磁界
を与えて動作状態にしておき、レーザによつて印刷抵抗
（２）（２）のフアンクシヨントリミングを行う。従っ
て、磁気センサ（１）（１）の特性にばらつきがあつた
場合でも、そのばらつきを包含した状態で回路特性を判
断しながらトリミングを行うため、回路特性が最良の状
態となるように印刷抵抗（２）（２）を調整することが
できる。According to the present invention, in performing the function trimming of the printing resistors (2) and (2), a magnetic field is applied to the magnetic sensors (1) and (1) in advance to activate the magnetic sensors, and the printing resistors (2) and (2) ( 2) Function trimming is performed. Therefore, even if there are variations in the characteristics of the magnetic sensors (1) and (1), the trimming is performed while judging the circuit characteristics in a state in which the variations are included, so that the printing resistance is adjusted so that the circuit characteristics become the best. (2) (2) can be adjusted.
尚、この考案は、その精神を逸脱しない限り種々の改
変を為すことができ、そして、この考案が該改変せられ
たものに及ぶことは当然である。The present invention can be variously modified without departing from the spirit thereof, and it goes without saying that the present invention extends to the modified one.
［発明の効果］ 本発明は、上記一実施例に詳述したように、磁気セン
サと印刷抵抗の各別に電圧を印加する。該磁気センサは
該電圧を印加した状態で磁石を感知するとき、該磁気セ
ンサの抵抗値は磁界の強弱によって変化する。而して、
該磁気センサ及び印刷抵抗を通過した各電流電圧はコン
パレータに入力される。該コンパレータは各入力された
電流電圧を比較し、その結果を制御部に送って磁界の強
さを演算し乍ら前記印刷抵抗をファンクショントリミン
グし、最良の動作状態になるように該印刷抵抗を調整す
ることができる。斯くの如く、該磁気センサの特性のば
らつきも考慮されて印刷抵抗のトリミングを行うのであ
るから、回路特性が向上して不良品が低減し、製品の歩
留まりを良好にできる。[Effects of the Invention] In the present invention, as described in detail in the above embodiment, a voltage is applied to each of the magnetic sensor and the print resistor. When the magnetic sensor senses the magnet with the voltage applied, the resistance of the magnetic sensor changes according to the strength of the magnetic field. Thus,
Each current voltage that has passed through the magnetic sensor and the printed resistor is input to a comparator. The comparator compares each input current and voltage, sends the result to a control unit, calculates the strength of the magnetic field, performs function trimming of the printed resistor, and adjusts the printed resistor to obtain the best operating condition. Can be adjusted. As described above, since the trimming of the printed resistance is performed in consideration of the variation in the characteristics of the magnetic sensor, the circuit characteristics are improved, the number of defective products is reduced, and the yield of products can be improved.
第１図は本発明の一実施例を示す回路図である。 （１）……磁気センサ、（２）……印刷抵抗 （３）……コンパレータ FIG. 1 is a circuit diagram showing one embodiment of the present invention. (1): Magnetic sensor, (2): Printed resistance (3): Comparator
Claims (1)
気センサと印刷抵抗の夫々各別に電圧を印加し、該磁気
センサと印刷抵抗を通過した夫々の電流電圧をコンパレ
ータに入力し、該コンパレータにて双方の電流電圧を比
較し、該磁気センサの磁力に対応すべく該印刷抵抗をフ
ァンクショントリミングすることを特徴とする磁界トリ
ミング方法。1. A circuit board having a magnetic sensor, a voltage is applied to each of the magnetic sensor and the printed resistor, and a current and a voltage that have passed through the magnetic sensor and the printed resistor are input to a comparator. A magnetic field trimming method comprising comparing both current and voltage by a comparator, and performing function trimming of the printed resistor to correspond to a magnetic force of the magnetic sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1341530A JP2929628B2 (en) | 1989-12-29 | 1989-12-29 | Magnetic field trimming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1341530A JP2929628B2 (en) | 1989-12-29 | 1989-12-29 | Magnetic field trimming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03203303A JPH03203303A (en) | 1991-09-05 |
| JP2929628B2 true JP2929628B2 (en) | 1999-08-03 |
Family
ID=18346782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1341530A Expired - Fee Related JP2929628B2 (en) | 1989-12-29 | 1989-12-29 | Magnetic field trimming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2929628B2 (en) |
-
1989
- 1989-12-29 JP JP1341530A patent/JP2929628B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03203303A (en) | 1991-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |