JPS563447A - Tape recorder - Google Patents
Tape recorderInfo
- Publication number
- JPS563447A JPS563447A JP7778879A JP7778879A JPS563447A JP S563447 A JPS563447 A JP S563447A JP 7778879 A JP7778879 A JP 7778879A JP 7778879 A JP7778879 A JP 7778879A JP S563447 A JPS563447 A JP S563447A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- termination
- increases
- current
- change
- 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.)
- Granted
Links
Abstract
PURPOSE: To ensure the low-cost detection for the termination of the cassette tape both ends of which are fixed to the reel hub, by detecting the current change of the tape running drive motor and then obtaining the tape termination signal.
CONSTITUTION: With the sudden increase of current IM of tape running drive motor 1 at the tape termination, the voltage drop of resistance 2 increases. And then the base potential of transistor 3 increases, and accordingly the emitter potential also increases. As a result, the base potential increases for transistors 5 and 6 which form differential amplifier 4. The difference of the base potential between transistors 5 and 6 and caused by the change of motor current IM is turned to the input of amplifier 4. Thus the relation as shown in Fig2 is secured between differential output VO supplied from terminals 4a and 4b each and current IM. Change A of output VO is used for the tape termination detection signal in order to secure the start for the automatic stopping device or the tape termination warning circuit. In such way, the low-cost and effective detection is possible for the tap termination.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54077788A JPS6034174B2 (en) | 1979-06-20 | 1979-06-20 | tape recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54077788A JPS6034174B2 (en) | 1979-06-20 | 1979-06-20 | tape recorder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS563447A true JPS563447A (en) | 1981-01-14 |
JPS6034174B2 JPS6034174B2 (en) | 1985-08-07 |
Family
ID=13643707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54077788A Expired JPS6034174B2 (en) | 1979-06-20 | 1979-06-20 | tape recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6034174B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61108710A (en) * | 1984-11-02 | 1986-05-27 | Mitsubishi Petrochem Co Ltd | Antistatic flat yarn |
US7823618B2 (en) | 2007-03-28 | 2010-11-02 | Fujitsu Limited | Ultrasonic bonding apparatus |
US7938160B2 (en) | 2007-03-28 | 2011-05-10 | Fujitsu Limited | Ultrasonic bonding apparatus |
-
1979
- 1979-06-20 JP JP54077788A patent/JPS6034174B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61108710A (en) * | 1984-11-02 | 1986-05-27 | Mitsubishi Petrochem Co Ltd | Antistatic flat yarn |
US7823618B2 (en) | 2007-03-28 | 2010-11-02 | Fujitsu Limited | Ultrasonic bonding apparatus |
US7938160B2 (en) | 2007-03-28 | 2011-05-10 | Fujitsu Limited | Ultrasonic bonding apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS6034174B2 (en) | 1985-08-07 |
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