JPS5727425A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5727425A
JPS5727425A JP10222180A JP10222180A JPS5727425A JP S5727425 A JPS5727425 A JP S5727425A JP 10222180 A JP10222180 A JP 10222180A JP 10222180 A JP10222180 A JP 10222180A JP S5727425 A JPS5727425 A JP S5727425A
Authority
JP
Japan
Prior art keywords
voltage
waveform
electromechanical transducer
amplitude
magnetic recording
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
JP10222180A
Other languages
Japanese (ja)
Inventor
Masahiko Machida
Keitaro Yamashita
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP10222180A priority Critical patent/JPS5727425A/en
Publication of JPS5727425A publication Critical patent/JPS5727425A/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

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Control Of Direct Current Motors (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

PURPOSE:To protect an electromechanical transducer from the breakdown, by setting the sum of the amplitude of a distortion eliminating signal and the level of the reproduction control voltage within the electric field resistant limit of the electromechanical transducer. CONSTITUTION:The sawtooth wave produced from a generating circuit 36 is applied to a reverse input terminal of a differential amplifier 41 in the form of the voltage of waveoform 2 and via a phase reversing circuit 38 plus diodes 39 and 40. A waveform 3 is obtained from the amplifier 41. While a continuance wave 4 is delivered from an oscillator 43 and thus receives an amplitude modulation 42 by the voltage of the waveform 3. An adder 44 adds waveforms 1 and 5 together to obtain the voltage of waveform 6 at an output terminal 45. This voltage is kept between +E and -E and never exceeds this range. As a result, bimorph plates 7a and 7b are never broken.
JP10222180A 1980-07-25 1980-07-25 Magnetic recording and reproducing device Pending JPS5727425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10222180A JPS5727425A (en) 1980-07-25 1980-07-25 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10222180A JPS5727425A (en) 1980-07-25 1980-07-25 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5727425A true JPS5727425A (en) 1982-02-13

Family

ID=14321604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10222180A Pending JPS5727425A (en) 1980-07-25 1980-07-25 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5727425A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003331A1 (en) * 1988-09-30 1990-04-05 Ferro Corporation High surface area alpha-alumina and supercritical fluid synthesis thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003331A1 (en) * 1988-09-30 1990-04-05 Ferro Corporation High surface area alpha-alumina and supercritical fluid synthesis thereof

Similar Documents

Publication Publication Date Title
US4092610A (en) Modulated carrier amplifying system
JPS5757025A (en) Waveform converting circuit
JPS5843922B2 (en) Pulse Haba Henchyou Zoufuku Cairo
JPS54152846A (en) Pulse duration modulating signal amplifier circuit
CA1102418A (en) Amplifier systems
GB1495435A (en) Pulse width modulated signal amplifiers
JPS5727425A (en) Magnetic recording and reproducing device
US3806862A (en) Amplifier for sonar transmitter
GB2073456B (en) Digital-analogue converter circuit for speech-synthesizing electronic timepiece
SE8503063L (en) THE TELEPHONIC RIGHT WHICH CAN BE INTEGRATED MONOLITICALLY AND WHICH CREATES CONTROL SIGNALS FOR THE SUBSCRIBER'S CHARGE DISPLAY
ES8201374A1 (en) High-power electrical signals generator.
US4007332A (en) Artificial reverberation system
RU2007849C1 (en) Powerful key amplifier
JPS5680952A (en) Subscriber monitoring circuit
ES482602A1 (en) Acoustic horn for vehicles - has pulse width modulated circuit output to maintain constant power of horn
GB1312357A (en) Power amplifier
JPS561604A (en) Pulse duration modulating amplifier
SU947942A1 (en) High-voltage pulse generator
SU782179A1 (en) Sound-reproducing device
SU1690140A1 (en) Constant voltage/preset form alternate voltage converter
SU930133A1 (en) Device for reproducing alternate voltage
JPS564906A (en) Pulse-width modulating amplifier
SU1103346A1 (en) Amplifier
JPS5625213A (en) Magnetic recording and reproducing device
JPS5535531A (en) Half tone recording device