JPS56140523A - Driving device for electromechanical transducer - Google Patents

Driving device for electromechanical transducer

Info

Publication number
JPS56140523A
JPS56140523A JP4395580A JP4395580A JPS56140523A JP S56140523 A JPS56140523 A JP S56140523A JP 4395580 A JP4395580 A JP 4395580A JP 4395580 A JP4395580 A JP 4395580A JP S56140523 A JPS56140523 A JP S56140523A
Authority
JP
Japan
Prior art keywords
inter
voltage
electrode
capacitor
transducer
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
JP4395580A
Other languages
Japanese (ja)
Inventor
Masaaki Kobayashi
Koichi Ikata
Takenobu Isaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4395580A priority Critical patent/JPS56140523A/en
Publication of JPS56140523A publication Critical patent/JPS56140523A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
    • G11B5/588—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads
    • G11B5/592—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads using bimorph elements supporting the heads

Abstract

PURPOSE:To prevent the mechanical vibration of an electromechanical transducer by comparing the terminal voltage of a capacitor having the same capacity as the inter-electrode capacity of the transducer with the inter-electrode voltage of the transducer and then by negatively feeding their differential voltage back to a driving voltage generator. CONSTITUTION:The output signal of driving voltage generator 100 is applied between the electrodes of piezoelectric element 1, provided with video head 2 of an auto tracking device, via resistance R and also applied to capacitor 6, having nearly the same capacity as the inter-electrode capacity of piezoelectric element 1, via resistance R1. Then, the differential voltage between the inter-electrode voltage and the terminal voltage of capacitor 6 is found by operational amplifier 11 and negatively fed back to adder 15 of driving voltage generator 100 by way of phase shifter 18. Thus, the simple constitution can prevent effectively ringing at the mechanical resonance frequency of head 2 and traces on video tracks by head 2 can be performed accurately.
JP4395580A 1980-04-02 1980-04-02 Driving device for electromechanical transducer Pending JPS56140523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4395580A JPS56140523A (en) 1980-04-02 1980-04-02 Driving device for electromechanical transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4395580A JPS56140523A (en) 1980-04-02 1980-04-02 Driving device for electromechanical transducer

Publications (1)

Publication Number Publication Date
JPS56140523A true JPS56140523A (en) 1981-11-02

Family

ID=12678119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4395580A Pending JPS56140523A (en) 1980-04-02 1980-04-02 Driving device for electromechanical transducer

Country Status (1)

Country Link
JP (1) JPS56140523A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451859A (en) * 1982-04-02 1984-05-29 Ampex Corporation Magnetic video head position control
JPS61237110A (en) * 1985-04-15 1986-10-22 Sanyo Electric Co Ltd Piezoelectric element driving device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451859A (en) * 1982-04-02 1984-05-29 Ampex Corporation Magnetic video head position control
JPS61237110A (en) * 1985-04-15 1986-10-22 Sanyo Electric Co Ltd Piezoelectric element driving device

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