JPS5455465A - Device for compensating fluctuations in position detecting sensitivity - Google Patents

Device for compensating fluctuations in position detecting sensitivity

Info

Publication number
JPS5455465A
JPS5455465A JP12261577A JP12261577A JPS5455465A JP S5455465 A JPS5455465 A JP S5455465A JP 12261577 A JP12261577 A JP 12261577A JP 12261577 A JP12261577 A JP 12261577A JP S5455465 A JPS5455465 A JP S5455465A
Authority
JP
Japan
Prior art keywords
indicates
compensating
servo
head
resistor
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.)
Pending
Application number
JP12261577A
Other languages
Japanese (ja)
Inventor
Kazumitsu Hashizume
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.)
NIPPON SHIYUUHENKI KK
Fujitsu Ltd
Hitachi Ltd
Original Assignee
NIPPON SHIYUUHENKI KK
Fujitsu Ltd
Hitachi Ltd
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 NIPPON SHIYUUHENKI KK, Fujitsu Ltd, Hitachi Ltd filed Critical NIPPON SHIYUUHENKI KK
Priority to JP12261577A priority Critical patent/JPS5455465A/en
Publication of JPS5455465A publication Critical patent/JPS5455465A/en
Pending legal-status Critical Current

Links

Landscapes

  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To compensate the position detecting sensitivity by compensating the gain of automatic gain control means in a positional error detecting circuit in accordance with the position of a servo-head. CONSTITUTION:There is added a compensating circuit 20 which is equipped with not only an adder 13 and a D-A comparator 14 but also such a cylinder address resistor 12 as indicates the present position when the servo-head is kept stationary to position a track and as indicates the moving target track during the accessing operation and such a difference resistor 11 as indicates the number of left tracks to a target position and the moving direction during the accessing operation and as indicates 0 during other operations. Thus, the compensating voltage corresponding to the fluctuations due to the track position having the effective core width of the servo-head 1 is generated by the compensating circuit 20 and is fed through a wighing resistor 15 to a differential amplifier 7 so that the output of an adding circuit 6 is varied at the same ratio as the effective core width, thus maintaining the position detecting sensitivity costant.
JP12261577A 1977-10-13 1977-10-13 Device for compensating fluctuations in position detecting sensitivity Pending JPS5455465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12261577A JPS5455465A (en) 1977-10-13 1977-10-13 Device for compensating fluctuations in position detecting sensitivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12261577A JPS5455465A (en) 1977-10-13 1977-10-13 Device for compensating fluctuations in position detecting sensitivity

Publications (1)

Publication Number Publication Date
JPS5455465A true JPS5455465A (en) 1979-05-02

Family

ID=14840326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12261577A Pending JPS5455465A (en) 1977-10-13 1977-10-13 Device for compensating fluctuations in position detecting sensitivity

Country Status (1)

Country Link
JP (1) JPS5455465A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103166A (en) * 1980-10-14 1982-06-26 Rca Corp Video disc reproducer
JPS6066373A (en) * 1983-09-21 1985-04-16 Sony Corp Tracking circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103166A (en) * 1980-10-14 1982-06-26 Rca Corp Video disc reproducer
JPS6066373A (en) * 1983-09-21 1985-04-16 Sony Corp Tracking circuit

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