JPS645399A - Stepping motor driving circuit - Google Patents

Stepping motor driving circuit

Info

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
Application number
JP15824287A
Other languages
Japanese (ja)
Inventor
Toshihiro Fujishima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15824287A priority Critical patent/JPS645399A/en
Publication of JPS645399A publication Critical patent/JPS645399A/en
Pending legal-status Critical Current

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.
JP15824287A 1987-06-25 1987-06-25 Stepping motor driving circuit Pending JPS645399A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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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