JPH0420601U - - Google Patents
Info
- Publication number
- JPH0420601U JPH0420601U JP5720290U JP5720290U JPH0420601U JP H0420601 U JPH0420601 U JP H0420601U JP 5720290 U JP5720290 U JP 5720290U JP 5720290 U JP5720290 U JP 5720290U JP H0420601 U JPH0420601 U JP H0420601U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- field modulation
- modulation coil
- common emitter
- transistors
- 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)
- Recording Or Reproducing By Magnetic Means (AREA)
Description
第１図は本考案の磁界変調コイルのドライブ回
路図、第２図は本考案の他の実施例を示す磁界変
調コイルのドライブ回路図、第３図、第４図は従
来の磁界変調コイルのドライブ回路図を示す。
図中、ＭＬは磁界変調コイル、Ｔ１，Ｔ２はス
イツチングトランジスタ、ＩＥはエミツタ共通電
源を示す。
Figure 1 is a drive circuit diagram of a magnetic field modulation coil according to the present invention, Figure 2 is a drive circuit diagram of a magnetic field modulation coil showing another embodiment of the present invention, and Figures 3 and 4 are diagrams of a conventional magnetic field modulation coil. A drive circuit diagram is shown. In the figure, ML indicates a magnetic field modulation coil, T 1 and T 2 indicate switching transistors, and IE indicates a common emitter power supply.
Claims (1)
コレクタが第１及び第２の定電流源に接続されて
いる第１及び第２のトランジスタのコレクタ間に
磁界変調コイルを接続し、前記第１及び第２のト
ランジスタを交互にオン／オフ制御すると共に、
前記第１及び第２の定電流源に流れる電流が前記
共通エミツタ電流の1/2となるように設定されて
いることを特徴とする磁界変調コイルのドライブ
回路。 a magnetic field modulation coil is connected between the collectors of first and second transistors whose emitters are connected to a common emitter current source and whose respective collectors are connected to first and second constant current sources; 2 transistors are controlled on/off alternately,
A drive circuit for a magnetic field modulation coil, characterized in that the current flowing through the first and second constant current sources is set to be 1/2 of the common emitter current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5720290U JPH0420601U (en) | 1990-06-01 | 1990-06-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5720290U JPH0420601U (en) | 1990-06-01 | 1990-06-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0420601U true JPH0420601U (en) | 1992-02-20 |
Family
ID=31581703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5720290U Pending JPH0420601U (en) | 1990-06-01 | 1990-06-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0420601U (en) |
-
1990
- 1990-06-01 JP JP5720290U patent/JPH0420601U/ja active Pending
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