JPS6339621U

JPS6339621U -

Info

Publication number: JPS6339621U
Application number: JP13276386U
Authority: JP
Priority date: 1986-09-01
Filing date: 1986-09-01
Publication date: 1988-03-15

Description

[Brief explanation of drawings]

第１図はこの考案の実施例の構成を示す平面図
、第２図はこの考案の実施例の構成を示す回路図
、第３図はこの考案の他の実施例の要部の構成を
示す平面図、第４図は磁気センサを含む磁気検出
系の全体構成を示す模式図、第５図は従来提案さ
れている磁気センサの構成を示す平面図、第６図
は磁気センサにおける磁気抵抗素子の配列の一例
を示す図、第７図は第５図の回路図、第８図は従
来提案されている磁気センサの全検出系の構成を
示す回路図、第９図Ａ，Ｂ，Ｃは磁気センサ各部
の信号波形図である。１１……磁気ドラム、１２……磁気センサ、１
３……増幅器、１４……波形整形回路、ａ，ｂ，
ｃ，ｄ，ｅ，ｆ……電極、Ｒ_１１〜Ｒ_１８，Ｒ_２
１〜Ｒ_２８……磁気抵抗素子。 Figure 1 is a plan view showing the configuration of an embodiment of this invention, Figure 2 is a circuit diagram showing the configuration of an embodiment of this invention, and Figure 3 is a diagram showing the configuration of main parts of another embodiment of this invention. A plan view, FIG. 4 is a schematic diagram showing the overall configuration of a magnetic detection system including a magnetic sensor, FIG. 5 is a plan view showing the configuration of a conventionally proposed magnetic sensor, and FIG. 6 is a magnetoresistive element in the magnetic sensor. 7 is a circuit diagram of FIG. 5, FIG. 8 is a circuit diagram showing the configuration of the entire detection system of a conventionally proposed magnetic sensor, and FIGS. 9A, B, and C are It is a signal waveform diagram of each part of a magnetic sensor. 11... Magnetic drum, 12... Magnetic sensor, 1
3...Amplifier, 14...Waveform shaping circuit, a, b,
c, d, e, f... electrode, R ₁₁ to R ₁₈ , R _{2
1} to _R28 ... Magnetoresistive element.

Claims

[Scope of utility model registration request]

A plurality of magnetoresistive elements are connected in series to form first and second series connection circuits, these first and second series connection circuits are connected in parallel to each other, and the first and second series connection circuits are connected in series. comprising a bridge circuit from which first and second electric signals are respectively taken out from connection points between the magnetoresistive elements of the connection circuit, and this bridge circuit is disposed facing a movable magnetic medium;
In the magnetic sensor that detects the magnetic field formed by the magnetic medium using the magnetoresistive element, correction resistors are inserted and connected in series to each of the first and second series connection circuits, and these correction resistors include A magnetic sensor characterized by detachable bypass wires connected in parallel.