JPS5576479A - Driving circuit for printer electromagnet - Google Patents
Driving circuit for printer electromagnetInfo
- Publication number
- JPS5576479A JPS5576479A JP14995778A JP14995778A JPS5576479A JP S5576479 A JPS5576479 A JP S5576479A JP 14995778 A JP14995778 A JP 14995778A JP 14995778 A JP14995778 A JP 14995778A JP S5576479 A JPS5576479 A JP S5576479A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- magnet
- current
- electromagnet
- printer
- 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
- Dot-Matrix Printers And Others (AREA)
- Impact Printers (AREA)
Abstract
PURPOSE: To reduce the loss of transister Tr by installing transistor Tr to flow the current intermittently to the electromagnet to the printer driving circuit plus the diode which flows the current transiently to the magnet when the Tr is off.
CONSTITUTION: Transistor Tr2 is provided to flow the current intermittently to electromagnet 1 of the driving circuit which operates the printer in a high speed, along with diode 3 which flows the current transiently to magnet 1 when Tr2 is off. In addition, resistance 5 is connected in series to magnet 1 to measure the current flowing to magnet 1, and differential amplifier 6 is connected across resistance 5 to convert the current flowing to magnet 1 into the voltage. This voltage is applied to one terminal of comparator 7, and reference voltage Vr is applied to the other terminal for comparison. Then the voltage underwent the comparison through comparator 7 is applied to AND circuit 8, and the logic product is secured to control voltage A to set voltage C for control of Tr2. Thus the power consumption is reduced for Tr2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14995778A JPS5576479A (en) | 1978-12-06 | 1978-12-06 | Driving circuit for printer electromagnet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14995778A JPS5576479A (en) | 1978-12-06 | 1978-12-06 | Driving circuit for printer electromagnet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5576479A true JPS5576479A (en) | 1980-06-09 |
Family
ID=15486288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14995778A Pending JPS5576479A (en) | 1978-12-06 | 1978-12-06 | Driving circuit for printer electromagnet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5576479A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59139606A (en) * | 1982-09-10 | 1984-08-10 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Coil current controller |
JPS6216161A (en) * | 1985-07-16 | 1987-01-24 | Fujitsu Ltd | System for driving printing head |
-
1978
- 1978-12-06 JP JP14995778A patent/JPS5576479A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59139606A (en) * | 1982-09-10 | 1984-08-10 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Coil current controller |
JPH0410722B2 (en) * | 1982-09-10 | 1992-02-26 | ||
JPS6216161A (en) * | 1985-07-16 | 1987-01-24 | Fujitsu Ltd | System for driving printing head |
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