JPH0244899U - - Google Patents
Info
- Publication number
- JPH0244899U JPH0244899U JP1988122613U JP12261388U JPH0244899U JP H0244899 U JPH0244899 U JP H0244899U JP 1988122613 U JP1988122613 U JP 1988122613U JP 12261388 U JP12261388 U JP 12261388U JP H0244899 U JPH0244899 U JP H0244899U
- Authority
- JP
- Japan
- Prior art keywords
- emitter
- outputs
- collectors
- inverting amplifier
- voice coil
- 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
- 238000001514 detection method Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Linear Motors (AREA)
Description
第１図は本考案の一実施例に係るボイスコイル
モータ駆動回路の構成を示す回路図、第２図は従
来のボイスコイルモータ駆動回路の構成を示す回
路図である。
１……入力素子、２……コイル、３……非反転
アンプ、５……反転アンプ、７，９，１１，１３
……トランジスタ、１５……抵抗、１７……差動
アンプ。
FIG. 1 is a circuit diagram showing the configuration of a voice coil motor drive circuit according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing the configuration of a conventional voice coil motor drive circuit. 1... Input element, 2... Coil, 3... Non-inverting amplifier, 5... Inverting amplifier, 7, 9, 11, 13
...Transistor, 15...Resistor, 17...Differential amplifier.
Claims (1)
スコイルモータのコイルに流れる電流を負帰還し
た検出信号から制御信号を出力する入力素子と、 前記制御信号の極性をそのまま出力する非反転
アンプと、 前記制御信号の極性を反転して出力する反転ア
ンプと、 コレクタ同士が接続され、各ベースに前記非反
転アンプの出力信号が入力され、一方のエミツタ
は電源に接続され、他方のエミツタは接地される
第１および第２のトランジスタと、 コレクタ同士が接続され、各ベースに前記反転
アンプの出力信号が入力され、一方のエミツタは
電源に接続され、他方のエミツタは接地される第
３および第４のトランジスタと、 前記第１および第２のトランジスタのコレクタ
と前記第３および第４のトランジスタのコレクタ
間に直列に接続された、ボイスコイルモータのコ
イルおよび抵抗と、 前記抵抗の両端に接続され、前記抵抗の両端に
生じる電圧に応じた検出信号を前記入力素子に負
帰還する差動アンプと、 を有することを特徴とするボイスコイルモータ
駆動回路。[Claims for Utility Model Registration] An input element that outputs a control signal based on a position signal indicating the position of a magnetic head and a detection signal obtained by negative feedback of a current flowing through a coil of a voice coil motor, and an input element that outputs a control signal from a detection signal that is negative feedback of a current flowing through a coil of a voice coil motor; A non-inverting amplifier that outputs an output, and an inverting amplifier that inverts the polarity of the control signal and outputs the control signal, the collectors of which are connected to each other, the output signal of the non-inverting amplifier is input to each base, and one emitter is connected to a power supply. , the other emitter is connected to the first and second transistors whose collectors are grounded, the output signal of the inverting amplifier is input to each base, one emitter is connected to the power supply, and the other emitter is grounded. a coil and a resistor of a voice coil motor connected in series between the collectors of the first and second transistors and the collectors of the third and fourth transistors; A voice coil motor drive circuit comprising: a differential amplifier connected to both ends of a resistor and configured to negatively feed back a detection signal corresponding to a voltage generated across the resistor to the input element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988122613U JPH0244899U (en) | 1988-09-19 | 1988-09-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988122613U JPH0244899U (en) | 1988-09-19 | 1988-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0244899U true JPH0244899U (en) | 1990-03-28 |
Family
ID=31370704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988122613U Pending JPH0244899U (en) | 1988-09-19 | 1988-09-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244899U (en) |
-
1988
- 1988-09-19 JP JP1988122613U patent/JPH0244899U/ja active Pending
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