SU1265840A1 - Device for controlling displacement of video head in autotracking system - Google Patents
Device for controlling displacement of video head in autotracking system Download PDFInfo
- Publication number
- SU1265840A1 SU1265840A1 SU853908483A SU3908483A SU1265840A1 SU 1265840 A1 SU1265840 A1 SU 1265840A1 SU 853908483 A SU853908483 A SU 853908483A SU 3908483 A SU3908483 A SU 3908483A SU 1265840 A1 SU1265840 A1 SU 1265840A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- video head
- video
- amplifier
- electrodes
- piezoelectric element
- Prior art date
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)
Abstract
Изобретение используетс в аппаратах , осуществл ющих построчную , запись информации, в частности в видеомагнитофонах, и позвол ет расширить диапазон скоростей воспроизведени видеомагнитофона. Дл этого на наружные электроды 5 и 8 биморфного консольно закрепленного пьезоэлемента , на котором расположен сер-г дечник видеоголовки 12 от положительного 3 и отрицательного 6 источников опорного напр жени подаютс пол ризующие напр жени , которые поступают . на ишны питани 4 и 7 усилител 1, вход которого соединен с управл ющим электродом 9 пьез.оэлемента. Такое соединение расшир ет границы измереi ни напр женности электрического пол в биморфных пластинках 10 и 11 и (Л С диапазон их деформации, что, в свою очередь, распшр ет пределы перемещени видеоголовки. 2 ил.The invention is used in line recorders, recording information, in particular in video tape recorders, and allows the playback speed range of the video tape recorder to be expanded. To do this, the outer electrodes 5 and 8 of the bimorph cantilever-mounted piezoelectric element, on which the ser- ous plate of the video head 12 is located, are positive from the positive 3 and negative 6 sources of the supporting voltage, and polarizing voltages are applied. These are power supplies 4 and 7 of amplifier 1, the input of which is connected to the control electrode 9 of the piezoelectric element. Such a connection expands the boundaries of the measurement of the electric field intensity in bimorph plates 10 and 11 and (L C the range of their deformation, which, in turn, expands the limits of movement of the video head. 2 Il.
Description
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00 4 « Изобретение относитс к области магнитной записи и может быть исполь зовано в аппаратах, осуществл ющих построчную запись информации, в част ности, в видеомагнитофонах, Целью изобретени вл етс расширение диапазона скоростей воспроизведени видеомагнитофона. На фиг, 1 представлена функциональна схема устройства; на фиг,2 эпюры напр жений, по сн ющие его работу, . , Устройство дл управлени переме .щением видеоголовки в системе автотрекинга содержит усилитель : 1, вход которого соединен .с шиной 2 управл ющего сигналаJ источник 3 положительного опорного напр жени , выход которого соединен с шиной.питани 4 усилител и электродом 5.пьезоэлемен та, источник 6 отрицательного опоргНого напр жени , выход которого coe-i динен с шиной 7 питани усилител и электродом 8 пьезоэлемента, а выход усилител 1 соединен с электродом 9 пьезоэлемента. Направлени пол ризации пьезопластин 10 и 11, образующих биморфный пьезоэлемент, совпадают (показаны стрелками).00 4 "The invention relates to the field of magnetic recording and can be used in devices that perform line-by-line recording of information, in particular, in video recorders. The aim of the invention is to expand the range of playback speeds of a video recorder. Fig, 1 shows a functional diagram of the device; Fig. 2 stress diagrams for his work,. The device for controlling the displacement of the video head in the auto tracking system contains an amplifier: 1, the input of which is connected to bus 2 of the control signal J a source 3 of a positive reference voltage, the output of which is connected to the bus. 4 of the amplifier and an electrode 5. A piezo element, a source 6 of the negative bias voltage, the output of which coe-i is connected to the amplifier supply bus 7 and the piezoelectric electrode 8, and the output of the amplifier 1 is connected to the piezoelectric electrode 9. The polarization directions of piezoplates 10 and 11, which form a bimorph piezoelectric element, coincide (shown by arrows).
Устройство работает следующим образом ,The device works as follows
При отсутствии сигнала управлени пьезоэлементом на выходе усилител имеетс нулевое напр жение. При этом разность потенциалов, между электродами 5 и 9 составл ет U, а между электродами 8 и 9 составл ет также Umax Пьезоэлемент при этом не отклонен . При подаче управл ющего сигнала на вход усилител 1, например, синусоидальной формы, напр жение на электроде 9 будет также мен тьс по .синусоидальному закону (фиг,2). В момент времени t разность потенциалов между электродами 5 и 9 составл ет О В, что заставл ет укорачиватьс пьезопластину 10, при этом разность потенциалов между электродами 8 и 9 составл ет что заставл ет удлин тьс пьезопластину In the absence of a control signal of the piezoelectric element, the output voltage of the amplifier is zero. In this case, the potential difference between the electrodes 5 and 9 is U, and between the electrodes 8 and 9 is also Umax The piezoelectric element is not rejected. When a control signal is applied to the input of amplifier 1, for example, of a sinusoidal form, the voltage on the electrode 9 will also vary according to the sinusoidal law (Fig. 2). At time t, the potential difference between the electrodes 5 and 9 is 0 V, which causes the piezo-plate 10 to be shortened, while the potential difference between the electrodes 8 and 9 is what makes the piezo-plate longer
головки, и, как следствие, расщир етс диапазон скоростей воспроизведени видеомагнитофона, что расщир ет его функциональные возможности.heads, and, as a result, the playback speed range of the VCR is expanded, which extends its functionality.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU853908483A SU1265840A1 (en) | 1985-06-10 | 1985-06-10 | Device for controlling displacement of video head in autotracking system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU853908483A SU1265840A1 (en) | 1985-06-10 | 1985-06-10 | Device for controlling displacement of video head in autotracking system |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1265840A1 true SU1265840A1 (en) | 1986-10-23 |
Family
ID=21181904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU853908483A SU1265840A1 (en) | 1985-06-10 | 1985-06-10 | Device for controlling displacement of video head in autotracking system |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1265840A1 (en) |
-
1985
- 1985-06-10 SU SU853908483A patent/SU1265840A1/en active
Non-Patent Citations (1)
Title |
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Патент US № 4.106.065, кл. G 11 В 5/52, 1979. Патент US № 4.169.276, кл. G 11 В 5/52, 1980. * |
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