JPS54143614A - Magnetic recorder-reproducer - Google Patents
Magnetic recorder-reproducerInfo
- Publication number
- JPS54143614A JPS54143614A JP5313678A JP5313678A JPS54143614A JP S54143614 A JPS54143614 A JP S54143614A JP 5313678 A JP5313678 A JP 5313678A JP 5313678 A JP5313678 A JP 5313678A JP S54143614 A JPS54143614 A JP S54143614A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- thickness
- revolutions
- hub
- accomplished
- 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
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE: To enable lapse time or remaining time to be displayed immediately in a play state even if a tape is loaded by letting the signal associated to the rotating speed of a hub be the speed difference of the number of revolutions of the first half of the revolutions of plural times of the hub and the number of revolutions of the second half.
CONSTITUTION: In a reference pulse counter 35, the addition and subtraction of the reference pulses at the revolving of the first and second half of a hub are accomplished and when the contents thereof are latched in a latch circuit L1 or L6, the latched contents are supplied as a mean value NT to a microcomputer 36. Hence, in the computer 36 in which programs have beforehand been written, the operations in compliance with the programs are first accomplished with K as 10 along with inputting of said mean value NT of NPN - NPN-K to obtain a thickness Δ and this is memorized ana at the same time the discrimination of whether this thickness Δ is the tape thickness of a 60-minute tape C3, or the tape thickness of a 90-minute tape C2 or the tape thickness of a l20-minute tape C1 is accomplished.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53053136A JPS5837631B2 (en) | 1978-04-28 | 1978-04-28 | magnetic recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53053136A JPS5837631B2 (en) | 1978-04-28 | 1978-04-28 | magnetic recording and reproducing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54143614A true JPS54143614A (en) | 1979-11-09 |
JPS5837631B2 JPS5837631B2 (en) | 1983-08-17 |
Family
ID=12934397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53053136A Expired JPS5837631B2 (en) | 1978-04-28 | 1978-04-28 | magnetic recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5837631B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5814389A (en) * | 1981-07-20 | 1983-01-27 | Matsushita Electric Ind Co Ltd | Detector for tape residual amount of tape |
US4644436A (en) * | 1982-05-19 | 1987-02-17 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for determining the type and remaining capacity of a tape |
-
1978
- 1978-04-28 JP JP53053136A patent/JPS5837631B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5814389A (en) * | 1981-07-20 | 1983-01-27 | Matsushita Electric Ind Co Ltd | Detector for tape residual amount of tape |
US4644436A (en) * | 1982-05-19 | 1987-02-17 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for determining the type and remaining capacity of a tape |
Also Published As
Publication number | Publication date |
---|---|
JPS5837631B2 (en) | 1983-08-17 |
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