JPS645399A - Stepping motor driving circuit - Google Patents
Stepping motor driving circuitInfo
- Publication number
- JPS645399A JPS645399A JP15824287A JP15824287A JPS645399A JP S645399 A JPS645399 A JP S645399A JP 15824287 A JP15824287 A JP 15824287A JP 15824287 A JP15824287 A JP 15824287A JP S645399 A JPS645399 A JP S645399A
- Authority
- JP
- Japan
- Prior art keywords
- transistors
- level
- phase switching
- output port
- driving circuit
- 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 prevent chopper transistors, phase switching transistors, and the like from being damaged, by controlling output from an output port via exclusive logical sum gates. CONSTITUTION:The input of signals A, B, C, D from an output port 10, to respective exclusive logical sum gates 14a, 14b, 14c, 14d is provided, and the base of transistors 2a, 2b, 2c, 2d is controlled. As a result, even if the output A, C or B, D of the output port 10 comes to a level H at the same time owing to the runaway, malfunction, and the like of a micro-processor, the level of voltage applied to the phase switching transistors 2a, 2b, 2c, 2d comes to a level L, and chopper transistors 6a, 6b, the phase switching transistors 2a, 2d, 2c, 2d, and the like are prevented from generating abnormal oscillation and from being destroyed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15824287A JPS645399A (en) | 1987-06-25 | 1987-06-25 | Stepping motor driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15824287A JPS645399A (en) | 1987-06-25 | 1987-06-25 | Stepping motor driving circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS645399A true JPS645399A (en) | 1989-01-10 |
Family
ID=15667366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15824287A Pending JPS645399A (en) | 1987-06-25 | 1987-06-25 | Stepping motor driving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS645399A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5392414A (en) * | 1977-01-24 | 1978-08-14 | Ricoh Co Ltd | Power source protecting system for pulse motor |
JPS5866599A (en) * | 1981-10-13 | 1983-04-20 | Nec Corp | Drive system for stepping motor |
JPS61240892A (en) * | 1985-04-15 | 1986-10-27 | Hitachi Ltd | Constant-current drive circuit |
JPS6323595A (en) * | 1986-07-14 | 1988-01-30 | Fujitsu Ltd | Drive circuit for pulse motor |
JPS641499A (en) * | 1987-06-23 | 1989-01-05 | Fujitsu Ltd | Pulse motor control system |
-
1987
- 1987-06-25 JP JP15824287A patent/JPS645399A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5392414A (en) * | 1977-01-24 | 1978-08-14 | Ricoh Co Ltd | Power source protecting system for pulse motor |
JPS5866599A (en) * | 1981-10-13 | 1983-04-20 | Nec Corp | Drive system for stepping motor |
JPS61240892A (en) * | 1985-04-15 | 1986-10-27 | Hitachi Ltd | Constant-current drive circuit |
JPS6323595A (en) * | 1986-07-14 | 1988-01-30 | Fujitsu Ltd | Drive circuit for pulse motor |
JPS641499A (en) * | 1987-06-23 | 1989-01-05 | Fujitsu Ltd | Pulse motor control system |
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