JPS5475929A - Magnetic signal collating device - Google Patents

Magnetic signal collating device

Info

Publication number
JPS5475929A
JPS5475929A JP14428477A JP14428477A JPS5475929A JP S5475929 A JPS5475929 A JP S5475929A JP 14428477 A JP14428477 A JP 14428477A JP 14428477 A JP14428477 A JP 14428477A JP S5475929 A JPS5475929 A JP S5475929A
Authority
JP
Japan
Prior art keywords
magnetic
output
magnetic field
elements
bias
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
Application number
JP14428477A
Other languages
Japanese (ja)
Other versions
JPS601671B2 (en
Inventor
Masanobu Yoshisato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP52144284A priority Critical patent/JPS601671B2/en
Publication of JPS5475929A publication Critical patent/JPS5475929A/en
Publication of JPS601671B2 publication Critical patent/JPS601671B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Lock And Its Accessories (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Collating Specific Patterns (AREA)
  • Digital Magnetic Recording (AREA)
  • Magnetic Heads (AREA)

Abstract

PURPOSE: To enable to compare the signals of quaternary digital codes written in a magnetic card by using 2 mangetic resister elements with the same characteristics and a bias magnetic field generating device on the detecting portion.
CONSTITUTION: The strength of bias magnetic field applied to magnetic resister elements M1 and M2 is superposed by the magnetic field of magnetic signal portion on magnetic sheet 2 and respective elements M1 M2 show the resistance value corresponding to the bias magnetic field; the signals corresponding to the resistance value are outputted from output terminal 6. If respective output signals are V+, V- and Vo when the resistance of element M1 increases and that of element M2 decreases, the resistance of element M1 decreases and that of M2 increases, and both elements M1 and M2 increase or decrease, only a kind of magnetic bias obtains the output of V+. Therefore, when the hysteresis characteristic is applied to comparator circuit 7 so that output is generated from circuit 7 only when the output of V+ is abtained and output is not generated in case of Vo and V-, quaternary digital codes (NS, SN, NN, and SS) of the magnetic signal portion can be discriminated.
COPYRIGHT: (C)1979,JPO&Japio
JP52144284A 1977-11-29 1977-11-29 Magnetic signal verification device Expired JPS601671B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52144284A JPS601671B2 (en) 1977-11-29 1977-11-29 Magnetic signal verification device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52144284A JPS601671B2 (en) 1977-11-29 1977-11-29 Magnetic signal verification device

Publications (2)

Publication Number Publication Date
JPS5475929A true JPS5475929A (en) 1979-06-18
JPS601671B2 JPS601671B2 (en) 1985-01-16

Family

ID=15358489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52144284A Expired JPS601671B2 (en) 1977-11-29 1977-11-29 Magnetic signal verification device

Country Status (1)

Country Link
JP (1) JPS601671B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2518792A1 (en) * 1981-12-18 1983-06-24 Victor Company Of Japan MAGNETIC HEAD WITH HALL EFFECT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2518792A1 (en) * 1981-12-18 1983-06-24 Victor Company Of Japan MAGNETIC HEAD WITH HALL EFFECT

Also Published As

Publication number Publication date
JPS601671B2 (en) 1985-01-16

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