JPS5798170A - Discriminating track reading system - Google Patents
Discriminating track reading systemInfo
- Publication number
- JPS5798170A JPS5798170A JP55173462A JP17346280A JPS5798170A JP S5798170 A JPS5798170 A JP S5798170A JP 55173462 A JP55173462 A JP 55173462A JP 17346280 A JP17346280 A JP 17346280A JP S5798170 A JPS5798170 A JP S5798170A
- Authority
- JP
- Japan
- Prior art keywords
- track area
- logical
- discriminating
- inverted
- read
- 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
- 238000001514 detection method Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE:To prevent the data of the following discriminating track area from being read undesirably, by deciding a detection of a beginning mark in a discriminating track area, in the discriminating track area instruction period. CONSTITUTION:When a read ID index signal comes to be inverted to ''0'' from logical ''1'', a set output signal of the first FF circuit 15 is inverted and a counter 18 starts its counting operation. Subsequently, a decoder 19 continues to output a signal of logical ''0'' until a counting value of the counter 18 reaches a reference value, that is to say, a value corresponding to a discriminating track area instruction period, and when it reaches the reference value, the output of the decoder 19 is inverted to logical ''1''. When a beginning mark BM detecting signal 1 in the discriminating track area is applied, a reset output signal of the second FF circuit 16 is inverted to ''0'' from logical ''1'', is inputted to an AND gate 20, and a set output signal of the third FF circuit 17 is held at logical ''0''. That is to say, it is decided that the beginning mark BM to be read of the discriminating track area has been read satisfactorily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55173462A JPS5798170A (en) | 1980-12-09 | 1980-12-09 | Discriminating track reading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55173462A JPS5798170A (en) | 1980-12-09 | 1980-12-09 | Discriminating track reading system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5798170A true JPS5798170A (en) | 1982-06-18 |
| JPH0526267B2 JPH0526267B2 (en) | 1993-04-15 |
Family
ID=15960916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55173462A Granted JPS5798170A (en) | 1980-12-09 | 1980-12-09 | Discriminating track reading system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5798170A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54168139U (en) * | 1978-05-17 | 1979-11-27 |
-
1980
- 1980-12-09 JP JP55173462A patent/JPS5798170A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54168139U (en) * | 1978-05-17 | 1979-11-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0526267B2 (en) | 1993-04-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5798170A (en) | Discriminating track reading system | |
| JPS53144707A (en) | Signal detecting system by variable thresholds | |
| JPS567180A (en) | Character recognizing method for optical character reader | |
| JPS56111957A (en) | Data filing device | |
| JPS5341941A (en) | Pattern reading device | |
| JPS5372665A (en) | Time characteristics measuring system for contacts | |
| JPS56110147A (en) | Buffer memory circuit | |
| JPS56168290A (en) | Tape reader of numerical control device | |
| JPS57143654A (en) | Memory sequence extending circuit | |
| JPS56111959A (en) | Data filing device | |
| JPS57198519A (en) | Freezing system for number of used byte for magnetic disc device | |
| JPS5778654A (en) | Magnetic recording device | |
| JPS56157570A (en) | Bar-code reading system | |
| JPS56164478A (en) | Card red-in system | |
| JPS5758253A (en) | Control word protecting circuit | |
| JPS569855A (en) | Magnetic tape control system | |
| JPS576411A (en) | Magnetic tape reader | |
| JPS55113113A (en) | Initial synchronizing data reader of magnetic tape reader | |
| JPS5557972A (en) | Detection circuit for skip read | |
| JPS56140471A (en) | Information reader | |
| JPS55137780A (en) | Receiving processing method of facsimile communication control frame | |
| JPS56112149A (en) | Condensing method for transmission circuit trace information | |
| JPS57147177A (en) | Address signal detecting circuit | |
| JPS56165916A (en) | Write-in control system for magnetic tape device | |
| JPS5448512A (en) | Track overrun detection circuit |