JPS57140087A - Reproducing circuit for vtr - Google Patents

Reproducing circuit for vtr

Info

Publication number
JPS57140087A
JPS57140087A JP56024295A JP2429581A JPS57140087A JP S57140087 A JPS57140087 A JP S57140087A JP 56024295 A JP56024295 A JP 56024295A JP 2429581 A JP2429581 A JP 2429581A JP S57140087 A JPS57140087 A JP S57140087A
Authority
JP
Japan
Prior art keywords
output
circuit
amplifier
chip
reproducing
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
JP56024295A
Other languages
Japanese (ja)
Inventor
Kuniaki Miura
Akira Shibata
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56024295A priority Critical patent/JPS57140087A/en
Publication of JPS57140087A publication Critical patent/JPS57140087A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/02—Analogue recording or reproducing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To reduce the cost of a helical scanning type VTR reproducing circuit, by making up a preamplifier and a changeover switch accompanied with a normal reproduction and a special reproduction heads into IC in one chip. CONSTITUTION:Preamplifier 25-27 are fedback type preamplifiers not requiring peaking adjustment. An output (b) of the amplifier 26 and an output (c) of the amplifier 27 are applied to the 1st switching circuit 28 which changes over a normal reproducing head 2 and a special reproducing head 28 with a control signal (e). An output (a) of the amplifier 21 to which the output of the head 1 is inputted and an output (d) of the switching circuit 28 are inputted to the 2nd switching circuit 29 which is switched with a control signal (f). The circuits are formed in one chip IC30. Thus, circuit-integration is made in one chip, allowing to reduce the cost of reproducing circuit.
JP56024295A 1981-02-23 1981-02-23 Reproducing circuit for vtr Pending JPS57140087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56024295A JPS57140087A (en) 1981-02-23 1981-02-23 Reproducing circuit for vtr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56024295A JPS57140087A (en) 1981-02-23 1981-02-23 Reproducing circuit for vtr

Publications (1)

Publication Number Publication Date
JPS57140087A true JPS57140087A (en) 1982-08-30

Family

ID=12134169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56024295A Pending JPS57140087A (en) 1981-02-23 1981-02-23 Reproducing circuit for vtr

Country Status (1)

Country Link
JP (1) JPS57140087A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057277U (en) * 1983-09-26 1985-04-22 三洋電機株式会社 Head output switching circuit
JPS6276382A (en) * 1985-09-27 1987-04-08 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing device
JPH09106591A (en) * 1996-10-23 1997-04-22 Hitachi Ltd Magneto-optical disk device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513267A (en) * 1966-05-16 1970-05-19 Ampex Low input impedance playback preamplifier for swamping out head resonance in a video tape reproducing system
JPS509580A (en) * 1973-05-30 1975-01-31
JPS52129221A (en) * 1976-04-22 1977-10-29 Sony Corp Magnetic reproducing unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513267A (en) * 1966-05-16 1970-05-19 Ampex Low input impedance playback preamplifier for swamping out head resonance in a video tape reproducing system
JPS509580A (en) * 1973-05-30 1975-01-31
JPS52129221A (en) * 1976-04-22 1977-10-29 Sony Corp Magnetic reproducing unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057277U (en) * 1983-09-26 1985-04-22 三洋電機株式会社 Head output switching circuit
JPS6276382A (en) * 1985-09-27 1987-04-08 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing device
JPH09106591A (en) * 1996-10-23 1997-04-22 Hitachi Ltd Magneto-optical disk device

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