JPS5475929A - Magnetic signal collating device - Google Patents
Magnetic signal collating deviceInfo
- 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
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
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)
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 |
-
1977
- 1977-11-29 JP JP52144284A patent/JPS601671B2/en not_active Expired
Cited By (1)
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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