JPS5545114A - Positioning information generating circuit - Google Patents

Positioning information generating circuit

Info

Publication number
JPS5545114A
JPS5545114A JP11703078A JP11703078A JPS5545114A JP S5545114 A JPS5545114 A JP S5545114A JP 11703078 A JP11703078 A JP 11703078A JP 11703078 A JP11703078 A JP 11703078A JP S5545114 A JPS5545114 A JP S5545114A
Authority
JP
Japan
Prior art keywords
output
comparator
differential output
saw
inversion
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
JP11703078A
Other languages
Japanese (ja)
Other versions
JPS6057144B2 (en
Inventor
Toshiaki Hattori
Hiromi Hamaoka
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11703078A priority Critical patent/JPS6057144B2/en
Publication of JPS5545114A publication Critical patent/JPS5545114A/en
Publication of JPS6057144B2 publication Critical patent/JPS6057144B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE: To obtain accurately the positioning information of a head of the head positioning unit of a magnetic disk unit by obtaining speed information from a generated saw-tooth signal and then by stopping only a component close to switching by differentiating the information.
CONSTITUTION: Comparators 42 and 44 which compare 1st differential output 37 with voltage levels V3 and V2, and comparator 40 which makes a comparison between 2nd differential output 39 and voltage level V1 and then generates an output are provided. Then, the outputs of comparators 42 and 44 are AND-ed as to signals obtained from 1st differential output 37 and the inversion output of comparator 40, and the inversion signal of the 1st differential output 37 and the 2nd differential output 39, or a saw-tooth signal is generated by the 2nd differential output 39 and the output of comparator 42, and the inversion output of the 2nd output 39 and the output of comparator 44, so that speed information will be obtained from this saw-tooth signal. Consequently, accurate speed information can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP11703078A 1978-09-22 1978-09-22 Positioning information generation circuit Expired JPS6057144B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11703078A JPS6057144B2 (en) 1978-09-22 1978-09-22 Positioning information generation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11703078A JPS6057144B2 (en) 1978-09-22 1978-09-22 Positioning information generation circuit

Publications (2)

Publication Number Publication Date
JPS5545114A true JPS5545114A (en) 1980-03-29
JPS6057144B2 JPS6057144B2 (en) 1985-12-13

Family

ID=14701701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11703078A Expired JPS6057144B2 (en) 1978-09-22 1978-09-22 Positioning information generation circuit

Country Status (1)

Country Link
JP (1) JPS6057144B2 (en)

Also Published As

Publication number Publication date
JPS6057144B2 (en) 1985-12-13

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