JPS5485318A - Step motor drive circuit - Google Patents

Step motor drive circuit

Info

Publication number
JPS5485318A
JPS5485318A JP14116077A JP14116077A JPS5485318A JP S5485318 A JPS5485318 A JP S5485318A JP 14116077 A JP14116077 A JP 14116077A JP 14116077 A JP14116077 A JP 14116077A JP S5485318 A JPS5485318 A JP S5485318A
Authority
JP
Japan
Prior art keywords
motor
current
potential
driving
input signals
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
JP14116077A
Other languages
Japanese (ja)
Inventor
Fumiaki Mukoyama
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP14116077A priority Critical patent/JPS5485318A/en
Publication of JPS5485318A publication Critical patent/JPS5485318A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To reduce the consumed power, by controlling the bases of driving transistors for a stemp motor by a minute current despite the level of the motor driving current to control the driving current. CONSTITUTION:The four-phase step motor drive circuit consists of base resistors r1-r4, the driving transistors T1-T4, protective diodes D1-D4, motor windings M1-M4 and current limiting resistors R1, R2. The potential of the input signals of the input signals phi1-phi4 to the motor windings is sequentially raised to drive the motor stepwide. AND gates A1-A4 are connected between the input signals phi1- phi4 and the base resistors r1-r4. When the potential of an external control terminal PD is high, normal step motor driving is effected. When the potential is low, the potential of the bases of the transistors T1-T4 is also low. Thus, the base current and the collector current to not smoothly flow. As a result, the windings M1-M4 are de- energized.
JP14116077A 1977-11-25 1977-11-25 Step motor drive circuit Pending JPS5485318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14116077A JPS5485318A (en) 1977-11-25 1977-11-25 Step motor drive circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14116077A JPS5485318A (en) 1977-11-25 1977-11-25 Step motor drive circuit

Publications (1)

Publication Number Publication Date
JPS5485318A true JPS5485318A (en) 1979-07-06

Family

ID=15285518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14116077A Pending JPS5485318A (en) 1977-11-25 1977-11-25 Step motor drive circuit

Country Status (1)

Country Link
JP (1) JPS5485318A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61221597A (en) * 1985-03-25 1986-10-01 Citizen Watch Co Ltd Stepping motor drive circuit for floppy disk drive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61221597A (en) * 1985-03-25 1986-10-01 Citizen Watch Co Ltd Stepping motor drive circuit for floppy disk drive

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