JPS54143614A - Magnetic recorder-reproducer - Google Patents

Magnetic recorder-reproducer

Info

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
Application number
JP5313678A
Other languages
Japanese (ja)
Other versions
JPS5837631B2 (en
Inventor
Koichi Nakano
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP53053136A priority Critical patent/JPS5837631B2/en
Publication of JPS54143614A publication Critical patent/JPS54143614A/en
Publication of JPS5837631B2 publication Critical patent/JPS5837631B2/en
Expired legal-status Critical Current

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
JP53053136A 1978-04-28 1978-04-28 magnetic recording and reproducing device Expired JPS5837631B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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