JPS5714903A - Digital servo device - Google Patents

Digital servo device

Info

Publication number
JPS5714903A
JPS5714903A JP8922780A JP8922780A JPS5714903A JP S5714903 A JPS5714903 A JP S5714903A JP 8922780 A JP8922780 A JP 8922780A JP 8922780 A JP8922780 A JP 8922780A JP S5714903 A JPS5714903 A JP S5714903A
Authority
JP
Japan
Prior art keywords
digital
signal
pulse duration
detector
changed
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
JP8922780A
Other languages
Japanese (ja)
Other versions
JPS6365962B2 (en
Inventor
Yasunori Kobori
Hideo Nishijima
Isao Fukushima
Katsuhiko Goto
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.)
Hitachi Ltd
Original Assignee
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8922780A priority Critical patent/JPS5714903A/en
Publication of JPS5714903A publication Critical patent/JPS5714903A/en
Publication of JPS6365962B2 publication Critical patent/JPS6365962B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/26—Automatic controllers electric in which the output signal is a pulse-train
    • G05B11/28—Automatic controllers electric in which the output signal is a pulse-train using pulse-height modulation; using pulse-width modulation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Feedback Control In General (AREA)

Abstract

PURPOSE:To obtain a digital servo device which has a stable working without causing the disturbance such as an abnormal signal or the like, by turning the pulse duration modulated output into a signal having the pulse duration coinciding with the target extent of operation just for a short time immediately after the latch pulse. CONSTITUTION:The following circuits and detector are provided: a reference signal generating circuit 8 consisting of a counter means; a digital detector that delivers a digital signal in accordance with an error between the target value and a control subject such as the rotational system of a tape recorder or the like; and a pulse duration modulating circuit 7 that performs a digital comparison between the signal detected by the digital detector and the reference signal. Then the pulse duration modulated output is changed for a certain time into a signal that has the pulse duration coinciding with the target extent of operation before and after the contents of detection of the digital detector varies and then the digital information of the digital signal output is changed.
JP8922780A 1980-07-02 1980-07-02 Digital servo device Granted JPS5714903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8922780A JPS5714903A (en) 1980-07-02 1980-07-02 Digital servo device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8922780A JPS5714903A (en) 1980-07-02 1980-07-02 Digital servo device

Publications (2)

Publication Number Publication Date
JPS5714903A true JPS5714903A (en) 1982-01-26
JPS6365962B2 JPS6365962B2 (en) 1988-12-19

Family

ID=13964849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8922780A Granted JPS5714903A (en) 1980-07-02 1980-07-02 Digital servo device

Country Status (1)

Country Link
JP (1) JPS5714903A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63107748U (en) * 1986-12-27 1988-07-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63107748U (en) * 1986-12-27 1988-07-12

Also Published As

Publication number Publication date
JPS6365962B2 (en) 1988-12-19

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