JPS563447A - Tape recorder - Google Patents

Tape recorder

Info

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
Application number
JP7778879A
Other languages
Japanese (ja)
Other versions
JPS6034174B2 (en
Inventor
Isamu Takai
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 JP54077788A priority Critical patent/JPS6034174B2/en
Publication of JPS563447A publication Critical patent/JPS563447A/en
Publication of JPS6034174B2 publication Critical patent/JPS6034174B2/en
Expired legal-status Critical Current

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
JP54077788A 1979-06-20 1979-06-20 tape recorder Expired JPS6034174B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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