JPS55150154A - Driver of tape recorder - Google Patents
Driver of tape recorderInfo
- Publication number
- JPS55150154A JPS55150154A JP5710379A JP5710379A JPS55150154A JP S55150154 A JPS55150154 A JP S55150154A JP 5710379 A JP5710379 A JP 5710379A JP 5710379 A JP5710379 A JP 5710379A JP S55150154 A JPS55150154 A JP S55150154A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- operation mode
- motor
- voltage
- result
- 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 reduce electric power consumption by keeping a voltage drop due to the control transistor of a tape driving motor constant without reference to an operation mode by changing a driving-power-voltage change-over switch over according to the operation mode.
CONSTITUTION: Switch 6 is changed over according to an operation mode; in play mode, batteries 4aW4c are connected in parallel and in fast-winding or rewinding mode, they are connected in series. As a result, a voltage applied to motor 3 via transistor 2 for speed control is held low and high respectively to transfer required torque from motor 3 to a tape driving mechanism. Therefore, a voltage drop of transistor 2 is kept constant without reference to an operation mode in comparison with control over a voltage applied to motor 3 corresponding to variation in voltage drop of transistor 2 by controlling the base voltage of the transistor, and electric power consumed in play mode by transistor 2 is reduced. As a result, a tape recorder driving circuit is realized which has battery life prolonged as the result of low power consumption.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5710379A JPS55150154A (en) | 1979-05-11 | 1979-05-11 | Driver of tape recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5710379A JPS55150154A (en) | 1979-05-11 | 1979-05-11 | Driver of tape recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55150154A true JPS55150154A (en) | 1980-11-21 |
Family
ID=13046166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5710379A Pending JPS55150154A (en) | 1979-05-11 | 1979-05-11 | Driver of tape recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55150154A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH074694A (en) * | 1993-03-06 | 1995-01-10 | Samsung Electronics Co Ltd | Air conditioner |
-
1979
- 1979-05-11 JP JP5710379A patent/JPS55150154A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH074694A (en) * | 1993-03-06 | 1995-01-10 | Samsung Electronics Co Ltd | Air conditioner |
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