JPS54123843A - Drive unit for rotating magnetic field - Google Patents
Drive unit for rotating magnetic fieldInfo
- Publication number
- JPS54123843A JPS54123843A JP3133378A JP3133378A JPS54123843A JP S54123843 A JPS54123843 A JP S54123843A JP 3133378 A JP3133378 A JP 3133378A JP 3133378 A JP3133378 A JP 3133378A JP S54123843 A JPS54123843 A JP S54123843A
- Authority
- JP
- Japan
- Prior art keywords
- current
- switch
- stopping
- turned
- drive
- 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
Abstract
PURPOSE: To enable to dissolve the deficiency causing under-shoot easily, the turning off the positive current switch faster than the negative current switch, at the stopping of drive current.
CONSTITUTION: The positive current switch 16 and the negative current switch 17 are connected to the first terminal 12 of the drive coil 17 and the exciting current drive circuit 14 and the resonant capacitor 15 are connected to the second terminal 13 so that the switch 16 is turned off faster than the switch 17 at the stopping of the drive current I. Further, when the switch 17 is turned off at the stopping of the current I41, although the voltage Vs42 rapidly increases from 0 to the positive maximum value, since the npn transistor of the switch 16 is held lower for the base potential, it is not turned on and no leakage current is caused. That is, the bubble in a magnetic bubble chip can be stopped at a suitable position, and thus the undershoot of the current I can be prevented with low cost circuit constitution.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3133378A JPS54123843A (en) | 1978-03-17 | 1978-03-17 | Drive unit for rotating magnetic field |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3133378A JPS54123843A (en) | 1978-03-17 | 1978-03-17 | Drive unit for rotating magnetic field |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54123843A true JPS54123843A (en) | 1979-09-26 |
Family
ID=12328319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3133378A Pending JPS54123843A (en) | 1978-03-17 | 1978-03-17 | Drive unit for rotating magnetic field |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54123843A (en) |
-
1978
- 1978-03-17 JP JP3133378A patent/JPS54123843A/en active Pending
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