JPS648898A - Step motor drive circuit - Google Patents
Step motor drive circuitInfo
- Publication number
- JPS648898A JPS648898A JP16303187A JP16303187A JPS648898A JP S648898 A JPS648898 A JP S648898A JP 16303187 A JP16303187 A JP 16303187A JP 16303187 A JP16303187 A JP 16303187A JP S648898 A JPS648898 A JP S648898A
- Authority
- JP
- Japan
- Prior art keywords
- reference voltage
- exciting
- gradually
- drive circuit
- motor 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
Landscapes
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To prevent loud noise during stepping operation, by controlling current through a reference signal which increases gradually when rising and attenuates gradually when falling. CONSTITUTION:Voltage induced across a resistor 25 for detecting current flowing through an exciting coil A or C is compared with a reference voltage V'ref produced from a reference voltage generator 41. ON/OFF operation of a transistor 34 for feeding exciting current I11 is controlled corresponding to comparison result. The reference voltage generator 41 generates the reference voltage V'ref which increases gradually to a high level when exciting timing rises and attenuates gradually to a low level when the exciting timing falls.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16303187A JPS648898A (en) | 1987-06-30 | 1987-06-30 | Step motor drive circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16303187A JPS648898A (en) | 1987-06-30 | 1987-06-30 | Step motor drive circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648898A true JPS648898A (en) | 1989-01-12 |
Family
ID=15765872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16303187A Pending JPS648898A (en) | 1987-06-30 | 1987-06-30 | Step motor drive circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648898A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05122995A (en) * | 1991-10-28 | 1993-05-18 | Sharp Corp | Control circuit for stepping motor |
JP2002034292A (en) * | 2000-07-17 | 2002-01-31 | Rohm Co Ltd | Motor driver |
DE112016005379B4 (en) | 2015-11-24 | 2021-11-04 | Autonetworks Technologies, Ltd. | Shield connector and shielded cable with one connector |
-
1987
- 1987-06-30 JP JP16303187A patent/JPS648898A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05122995A (en) * | 1991-10-28 | 1993-05-18 | Sharp Corp | Control circuit for stepping motor |
JP2002034292A (en) * | 2000-07-17 | 2002-01-31 | Rohm Co Ltd | Motor driver |
DE112016005379B4 (en) | 2015-11-24 | 2021-11-04 | Autonetworks Technologies, Ltd. | Shield connector and shielded cable with one connector |
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