JPS5750359A - Rotary drive controller of recorded disk - Google Patents

Rotary drive controller of recorded disk

Info

Publication number
JPS5750359A
JPS5750359A JP12428680A JP12428680A JPS5750359A JP S5750359 A JPS5750359 A JP S5750359A JP 12428680 A JP12428680 A JP 12428680A JP 12428680 A JP12428680 A JP 12428680A JP S5750359 A JPS5750359 A JP S5750359A
Authority
JP
Japan
Prior art keywords
disk
circuit
signal
slanting
revolutions
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
JP12428680A
Other languages
Japanese (ja)
Other versions
JPS631662B2 (en
Inventor
Hiroyuki Hirano
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP12428680A priority Critical patent/JPS5750359A/en
Publication of JPS5750359A publication Critical patent/JPS5750359A/en
Publication of JPS631662B2 publication Critical patent/JPS631662B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE: To drive a recorded disk in a constant linear speed, by controlling both the period and inclination of a slanting signal in accordance with the number of revolutions of the recorded disk and the radius position of an information track and then controlling the number of revolutions of the disk based on the slanting signal.
CONSTITUTION: A frequency signal generator 2 produces a frequency signal (a) proportional to the number of revolutions of a disk 1. At the same time, a current source circuit 3 produces a current inversely proportional to the change of the radius (r) of the disk 1 by making use of a potentiometer and supplies the current to a trapezoidal wave generating circuit 4. The circuit 4 produces a trapezoidal wave, i.e., a slanting signal by a pulse train signal of the generator 2. This trapezoidal wave receives sample holding by the signal (a) and through a sample holding circuit 5. A differential amplifier 6 obtains the difference between the output Vx of the circuit 5 and supplies it to a driving circuit 7. The circuit 7 amplifies the output of the amplifier 6 to drive a DC motor 10. Thus the disk 1 can be turned in a constant linear speed and regardless of the radius (r) of the disk.
COPYRIGHT: (C)1982,JPO&Japio
JP12428680A 1980-09-08 1980-09-08 Rotary drive controller of recorded disk Granted JPS5750359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12428680A JPS5750359A (en) 1980-09-08 1980-09-08 Rotary drive controller of recorded disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12428680A JPS5750359A (en) 1980-09-08 1980-09-08 Rotary drive controller of recorded disk

Publications (2)

Publication Number Publication Date
JPS5750359A true JPS5750359A (en) 1982-03-24
JPS631662B2 JPS631662B2 (en) 1988-01-13

Family

ID=14881571

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12428680A Granted JPS5750359A (en) 1980-09-08 1980-09-08 Rotary drive controller of recorded disk

Country Status (1)

Country Link
JP (1) JPS5750359A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207883A (en) * 1982-05-25 1983-12-03 Sanyo Electric Co Ltd Speed control circuit for motor
JPH02119446U (en) * 1989-03-09 1990-09-26
US6088425A (en) * 1997-04-01 2000-07-11 Kabushiki Kaisha Toshiba X-ray apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207883A (en) * 1982-05-25 1983-12-03 Sanyo Electric Co Ltd Speed control circuit for motor
JPH02119446U (en) * 1989-03-09 1990-09-26
US6088425A (en) * 1997-04-01 2000-07-11 Kabushiki Kaisha Toshiba X-ray apparatus

Also Published As

Publication number Publication date
JPS631662B2 (en) 1988-01-13

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