JPS5538615A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5538615A
JPS5538615A JP10895078A JP10895078A JPS5538615A JP S5538615 A JPS5538615 A JP S5538615A JP 10895078 A JP10895078 A JP 10895078A JP 10895078 A JP10895078 A JP 10895078A JP S5538615 A JPS5538615 A JP S5538615A
Authority
JP
Japan
Prior art keywords
drum
adder
signal
motor
speed
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
JP10895078A
Other languages
Japanese (ja)
Other versions
JPS6127827B2 (en
Inventor
Masaaki Sakai
Mitsutoshi Magai
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP10895078A priority Critical patent/JPS5538615A/en
Publication of JPS5538615A publication Critical patent/JPS5538615A/en
Publication of JPS6127827B2 publication Critical patent/JPS6127827B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE: To prevent a picture from splitting by canceling the circumferential-speed error of a drum by a correction signal obtained by detecting and processing information corresponding to the rotation of the drum.
CONSTITUTION: To the lower end part of the rotation shaft of video head drum 1, magnetic member 4 which rotates synchronizing with rotary drum 1a is fitted being eccentric from the shaft, and magnetism sensing element 5 is provided corresponding to member 4. The speed of revolution of rotary drum 1a of drum 1 is detected by a speed detector, whose output signal controls motor 2 through trapezoidal-pulse generating circuit 13, sample holding circuit 14, adder 9, motor driver circuit 11, etc. Then, if unevenness of speed detection of drum 1 or torque variation of motor 2 occurs, an error signal is fed back to the adder. The sine-wave signal of magnetism sensing element 5, on the other hand, is amplified 6 and phase-shifted 7 to be equal in amplitude level to and out of phase with the error signal supplied to adder 9, and supplied as a correction signal to adder 9. Therefore, a corrected signal of the error signal appears at the output of adder 9 and is supplied to motor 2 after being amplified 10.
COPYRIGHT: (C)1980,JPO&Japio
JP10895078A 1978-09-05 1978-09-05 Magnetic recording and reproducing device Granted JPS5538615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10895078A JPS5538615A (en) 1978-09-05 1978-09-05 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10895078A JPS5538615A (en) 1978-09-05 1978-09-05 Magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS5538615A true JPS5538615A (en) 1980-03-18
JPS6127827B2 JPS6127827B2 (en) 1986-06-27

Family

ID=14497748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10895078A Granted JPS5538615A (en) 1978-09-05 1978-09-05 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5538615A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57121896A (en) * 1981-01-21 1982-07-29 Senjiyu Kinzoku Kogyo Kk Solder alloy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57121896A (en) * 1981-01-21 1982-07-29 Senjiyu Kinzoku Kogyo Kk Solder alloy
JPS6350118B2 (en) * 1981-01-21 1988-10-06 Senju Metal Industry Co

Also Published As

Publication number Publication date
JPS6127827B2 (en) 1986-06-27

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