JPS6439657A - Intermittent driving circuit - Google Patents

Intermittent driving circuit

Info

Publication number
JPS6439657A
JPS6439657A JP62196125A JP19612587A JPS6439657A JP S6439657 A JPS6439657 A JP S6439657A JP 62196125 A JP62196125 A JP 62196125A JP 19612587 A JP19612587 A JP 19612587A JP S6439657 A JPS6439657 A JP S6439657A
Authority
JP
Japan
Prior art keywords
pulse
generated
loop gain
motor
cylinder motor
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
JP62196125A
Other languages
Japanese (ja)
Inventor
Junichiro Tabuchi
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP62196125A priority Critical patent/JPS6439657A/en
Publication of JPS6439657A publication Critical patent/JPS6439657A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent horizontal swinging from being generated by reducing a difference between the change of speed in a cylinder motor, by lowering a loop gain for a prescribed period after starting up a capstan motor. CONSTITUTION:The start up of a tape is performed setting the edge of a head switching signal as reference, and a start up pulse C is generated based on the edge on one side of the head switching signal. An analog switch 7 is turned ON in the period of a pulse C set at an H level, and a source voltage is impressed on the servo input of a capstan motor driving circuit. Synchronizing with the above start up, a cylinder motor acceleration pulse A is generated, and the rotating speed of the cylinder motor is increased. Also, a capstan motor loop gain lowering pulse B is generated synchronizing with the pulse C. In the period which the pulse B is set at the H level, an analog switch 8 is turned on, and an input voltage at the inversion input terminal of an amplifier 6 is increased, then, the loop gain is lowered. In such a way, it is possible to prevent the horizontal swinging from being generated by reducing the difference between the change of the speed of the cylinder motor.
JP62196125A 1987-08-05 1987-08-05 Intermittent driving circuit Pending JPS6439657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62196125A JPS6439657A (en) 1987-08-05 1987-08-05 Intermittent driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62196125A JPS6439657A (en) 1987-08-05 1987-08-05 Intermittent driving circuit

Publications (1)

Publication Number Publication Date
JPS6439657A true JPS6439657A (en) 1989-02-09

Family

ID=16352659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62196125A Pending JPS6439657A (en) 1987-08-05 1987-08-05 Intermittent driving circuit

Country Status (1)

Country Link
JP (1) JPS6439657A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019247A (en) * 1973-06-22 1975-02-28
JPS51128508A (en) * 1975-04-30 1976-11-09 Nec Home Electronics Ltd Servocircuit of magnetic picture recording reproduction unit
JPS5553981A (en) * 1978-10-16 1980-04-19 Victor Co Of Japan Ltd Magnetic reproducer
JPS578945A (en) * 1980-06-16 1982-01-18 Matsushita Electric Ind Co Ltd Intermittent driver for magnetic tape
JPS5873045A (en) * 1981-10-27 1983-05-02 Matsushita Electric Ind Co Ltd Capstan servo circuit
JPS61123290A (en) * 1984-11-20 1986-06-11 Hitachi Ltd Magnetic recording and reproducing device
JPS62104385A (en) * 1985-10-31 1987-05-14 Sony Corp Video signal reproducing device
JPS6230479B2 (en) * 1980-04-09 1987-07-02 Hitachi Ltd

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019247A (en) * 1973-06-22 1975-02-28
JPS51128508A (en) * 1975-04-30 1976-11-09 Nec Home Electronics Ltd Servocircuit of magnetic picture recording reproduction unit
JPS5553981A (en) * 1978-10-16 1980-04-19 Victor Co Of Japan Ltd Magnetic reproducer
JPS6230479B2 (en) * 1980-04-09 1987-07-02 Hitachi Ltd
JPS578945A (en) * 1980-06-16 1982-01-18 Matsushita Electric Ind Co Ltd Intermittent driver for magnetic tape
JPS5873045A (en) * 1981-10-27 1983-05-02 Matsushita Electric Ind Co Ltd Capstan servo circuit
JPS61123290A (en) * 1984-11-20 1986-06-11 Hitachi Ltd Magnetic recording and reproducing device
JPS62104385A (en) * 1985-10-31 1987-05-14 Sony Corp Video signal reproducing device

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