JPS6273306U - - Google Patents
Info
- Publication number
- JPS6273306U JPS6273306U JP16311785U JP16311785U JPS6273306U JP S6273306 U JPS6273306 U JP S6273306U JP 16311785 U JP16311785 U JP 16311785U JP 16311785 U JP16311785 U JP 16311785U JP S6273306 U JPS6273306 U JP S6273306U
- Authority
- JP
- Japan
- Prior art keywords
- driver circuit
- erase
- switch
- rpm
- rotation speed
- 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 4
Landscapes
- Digital Magnetic Recording (AREA)
Description
第１図はこの考案の一実施例によるフレキシブ
ルデイスクドライブ装置のブロツク図、第２図は
従来のフレキシブルデイスクドライブ装置のブロ
ツク図、第３図はローパスフイルタ（ＬＯＷ Ｐ
ＡＳＳ ＦＩＬＴＥＲ）の周波数―利得特性図、
第４図はタイミングチヤート図である。
図中、１：回転数切換信号の入力端子、２：プ
ルアツプ抵抗Ｒ１、３：スイツチ、４：ドライバ
ー回路、５：スピンドル・モーター、６：ドライ
バー回路、７：プルアツプ抵抗Ｒ２、８：スイツ
チ、９：イレーズ電流駆動回路、１０：トンネル
イレーズヘツド、１１：ローパスフイルタ（ＬＯ
Ｗ ＰＡＳＳ ＦＩＬＴＥＲ）。尚図中同一符号
は同一或いは相当部分を示す。
FIG. 1 is a block diagram of a flexible disk drive device according to an embodiment of this invention, FIG. 2 is a block diagram of a conventional flexible disk drive device, and FIG. 3 is a block diagram of a conventional flexible disk drive device.
ASS FILTER) frequency-gain characteristic diagram,
FIG. 4 is a timing chart. In the figure, 1: input terminal for rotation speed switching signal, 2: pull-up resistor R1, 3: switch, 4: driver circuit, 5: spindle motor, 6: driver circuit, 7: pull-up resistor R2, 8: switch, 9 : Erase current drive circuit, 10: Tunnel erase head, 11: Low pass filter (LO
W PASS FILTER). Note that the same reference numerals in the drawings indicate the same or corresponding parts.
Claims (1)
または３６０ｒｐｍとに切り換える信号が入力す
る回転数切換え信号入力端子と、前記回転数切換
え信号を入力するオープンコレクタのドライバー
回路１と、ドライバー回路１の出力端子と、一方
の端子が接続するスイツチＳＷ１と、スイツチＳ
Ｗ１の他方の端子と電源間とに接続するプルアツ
プ抵抗Ｒ１と、スイツチＳＷ１を通つたドライバ
ー回路１の出力電圧により、回転数が３００ｒｐ
ｍまたは、３６０ｒｐｍとに切換わるスピンドル
モーターと、前記回転数切換え信号を入力するオ
ープンコレクタのドライバー回路２と、ドライバ
ー回路２の出力端子とアース（ＧＮＤ）間とに接
続するスイツチＳＷ２と、ドライバー回路２の出
力端子と電源間とに接続するプルアツプ抵抗Ｒ２
と、ドライバー回路２の出力端子の出力電圧によ
りイレーズヘツドに流れるイレーズ電流のイレー
ズオンデイレイタイムとイレーズオフデイレイタ
イムの時間が切り換わるイレーズ電流駆動回路と
、前記のイレーズ電流駆動回路により、駆動され
るトンネルイレーズヘツドと、前記回転数切換信
号によりカツトオフ周波数が変化するローパスフ
イルタ（ＬＯＷ ＰＡＳＳ ＦＩＬＴＥＲ）を備
えたことを特徴とするフレキシブルデイスクドラ
イブ装置。 Spindle motor rotation speed to 300 rpm
or 360 rpm, an open collector driver circuit 1 to which the rotation speed switching signal is input, an output terminal of the driver circuit 1, and a switch SW1 to which one terminal is connected. , Switch S
The rotation speed is set to 300 rpm by the pull-up resistor R1 connected between the other terminal of W1 and the power supply and the output voltage of the driver circuit 1 through the switch SW1.
m or 360 rpm, an open collector driver circuit 2 to which the rotation speed switching signal is input, a switch SW2 connected between the output terminal of the driver circuit 2 and ground (GND), and a driver circuit. Pull-up resistor R2 connected between the output terminal of 2 and the power supply
, an erase current drive circuit in which the erase-on delay time and erase-off delay time of the erase current flowing to the erase head are switched by the output voltage of the output terminal of the driver circuit 2; and a tunnel driven by the erase current drive circuit. A flexible disk drive device comprising an erase head and a low pass filter whose cutoff frequency changes according to the rotational speed switching signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16311785U JPS6273306U (en) | 1985-10-24 | 1985-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16311785U JPS6273306U (en) | 1985-10-24 | 1985-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6273306U true JPS6273306U (en) | 1987-05-11 |
Family
ID=31091017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16311785U Pending JPS6273306U (en) | 1985-10-24 | 1985-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6273306U (en) |
-
1985
- 1985-10-24 JP JP16311785U patent/JPS6273306U/ja active Pending
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