JPH0255461U - - Google Patents
Info
- Publication number
- JPH0255461U JPH0255461U JP1988132961U JP13296188U JPH0255461U JP H0255461 U JPH0255461 U JP H0255461U JP 1988132961 U JP1988132961 U JP 1988132961U JP 13296188 U JP13296188 U JP 13296188U JP H0255461 U JPH0255461 U JP H0255461U
- Authority
- JP
- Japan
- Prior art keywords
- bias
- circuit
- power amplifier
- supplies
- disk
- 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
Links
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Control Of Direct Current Motors (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
Description
第１図はこの考案の一実施例を示す回路図、第
２図はこの考案の動作を説明するための入出力特
性図、第３図は従来装置を示す回路図で、第４図
はその入出力特性図、第５図はデイスクヘツドの
シーク動作の状態を示す図、第６図は第３図を改
良したこの考案に至る前の回路図であり、各図に
おいて１は駆動機構、３，４は電力増巾器のドラ
イバ段トランジスタであり、２，５は同最終段ト
ランジスタ、６は入力端子、８，９はバイアス供
給のためのダイオード、１２はバイアス量切換回
路である。なお、各図中同一符号は同一または相
当部分を示すものとする。
Fig. 1 is a circuit diagram showing an embodiment of this invention, Fig. 2 is an input/output characteristic diagram to explain the operation of this invention, Fig. 3 is a circuit diagram showing a conventional device, and Fig. 4 is the same. The input/output characteristics diagram, FIG. 5 is a diagram showing the state of the seek operation of the disk head, and FIG. 6 is a circuit diagram before this invention, which is an improvement on FIG. , 4 are driver stage transistors of the power amplifier, 2 and 5 are final stage transistors, 6 is an input terminal, 8 and 9 are diodes for bias supply, and 12 is a bias amount switching circuit. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
所定位置に駆動する駆動機構、この駆動機構に駆
動電力を供給する電力増巾器、この電力増巾器の
ドライバ段にバイアスを供給するバイアス回路、
このバイアス回路によるバイアス量を切り換える
バイアス量切換回路を備えたことを特徴とするデ
イスクヘツド駆動装置。 A drive mechanism that drives the head for recording and reproducing data to a predetermined position on the disk, a power amplifier that supplies drive power to this drive mechanism, a bias circuit that supplies bias to the driver stage of this power amplifier;
A disk head drive device comprising a bias amount switching circuit for switching the bias amount by this bias circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988132961U JPH0255461U (en) | 1988-10-12 | 1988-10-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988132961U JPH0255461U (en) | 1988-10-12 | 1988-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0255461U true JPH0255461U (en) | 1990-04-20 |
Family
ID=31390399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988132961U Pending JPH0255461U (en) | 1988-10-12 | 1988-10-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0255461U (en) |
-
1988
- 1988-10-12 JP JP1988132961U patent/JPH0255461U/ja active Pending
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