JPS5720904A - Voltage-controlled amplifier for noise reduction system - Google Patents

Voltage-controlled amplifier for noise reduction system

Info

Publication number
JPS5720904A
JPS5720904A JP9583580A JP9583580A JPS5720904A JP S5720904 A JPS5720904 A JP S5720904A JP 9583580 A JP9583580 A JP 9583580A JP 9583580 A JP9583580 A JP 9583580A JP S5720904 A JPS5720904 A JP S5720904A
Authority
JP
Japan
Prior art keywords
output
input terminal
amplifier
inverted input
exclusively
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
JP9583580A
Other languages
Japanese (ja)
Inventor
Jun Ishii
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9583580A priority Critical patent/JPS5720904A/en
Publication of JPS5720904A publication Critical patent/JPS5720904A/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
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information

Landscapes

  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE:To reduce the cost of a main circuit part by IC-implementation by decreasing the number of used changeover switches to one by using one couple each of reverse logarithmic elements and output operational amplifiers and by providing two systems exclusively for recording and reproduction. CONSTITUTION:A logarithmic element 31 is connected between the input and output terminals of an input operational amplifier 30, and the 1st output amplifying circuit 32 exclusively for a recording system and the 2nd output amplifying circuit 33 exclusively for a reproduction system are connected in parallel to the output side of said amplifier. The input terminal of the 1st circuit 32 is connected to the inverted input terminal of an output amplifier 35 via a reverse logarithmic element 34, and between its output terminal and the inverted input terminal, a filter 36 composed of resistances R, R and Re and capacitors C and Ce is connected. The input terminal of the 2nd circuit 33 is connected to the inverted input terminal of the output amplifier 38 via a reverse logarithmic element 37, and between its output terminal and the inverted input terminal, a resistance 2 is connected. A changeover switch S is changed over between a recording R and a reproduction P side, and connected to the inverted input terminal of an input amplifier 30 via the resistance 2R or filter 39.
JP9583580A 1980-07-14 1980-07-14 Voltage-controlled amplifier for noise reduction system Pending JPS5720904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9583580A JPS5720904A (en) 1980-07-14 1980-07-14 Voltage-controlled amplifier for noise reduction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9583580A JPS5720904A (en) 1980-07-14 1980-07-14 Voltage-controlled amplifier for noise reduction system

Publications (1)

Publication Number Publication Date
JPS5720904A true JPS5720904A (en) 1982-02-03

Family

ID=14148435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9583580A Pending JPS5720904A (en) 1980-07-14 1980-07-14 Voltage-controlled amplifier for noise reduction system

Country Status (1)

Country Link
JP (1) JPS5720904A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5917055A (en) * 1982-07-17 1984-01-28 Daido Kogyo Co Ltd Stretch-forming type power transmission apparatus
JPS60196357A (en) * 1984-03-19 1985-10-04 Fujitsu Ltd Ink jet head
US5153610A (en) * 1984-01-31 1992-10-06 Canon Kabushiki Kaisha Liquid jet recording head
US5289209A (en) * 1990-11-13 1994-02-22 Citizen Watch Co., Ltd. Printing head for ink-jet printer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5917055A (en) * 1982-07-17 1984-01-28 Daido Kogyo Co Ltd Stretch-forming type power transmission apparatus
US5153610A (en) * 1984-01-31 1992-10-06 Canon Kabushiki Kaisha Liquid jet recording head
JPS60196357A (en) * 1984-03-19 1985-10-04 Fujitsu Ltd Ink jet head
US5289209A (en) * 1990-11-13 1994-02-22 Citizen Watch Co., Ltd. Printing head for ink-jet printer

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