JPS5720088A - Amplifier for microphone - Google Patents

Amplifier for microphone

Info

Publication number
JPS5720088A
JPS5720088A JP9534680A JP9534680A JPS5720088A JP S5720088 A JPS5720088 A JP S5720088A JP 9534680 A JP9534680 A JP 9534680A JP 9534680 A JP9534680 A JP 9534680A JP S5720088 A JPS5720088 A JP S5720088A
Authority
JP
Japan
Prior art keywords
inputted
input terminal
amplifying circuit
differential amplifying
microphone
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
JP9534680A
Other languages
Japanese (ja)
Inventor
Koji Shinomiya
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9534680A priority Critical patent/JPS5720088A/en
Publication of JPS5720088A publication Critical patent/JPS5720088A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/04—Studio equipment; Interconnection of studios

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To obtain only an acoustic signal which is about to be inputted, by composing an amplifying circuit for two microphones and three differential amplifying circuits and by offsetting noise which is the sound externally coming from the atmosphere, electrically. CONSTITUTION:The voltage level of an electric signal inputted from the 1st microphone which collects an acoustic signal to be inputted mainly to an input terminal 1 is adjusted by a variable resistance VR1 and the resulting signal is supplied to the uninverted input terminal of a differential amplifying circuit A1 via a capacitor C1. Further, the voltage level of an electric signal inputted from the 2nd microphone, collecting an ambient sound mainly, to an input terminal 2 is also adjusted by a variable resistance VR2, and the resulting signal is supplied to the uninverted input terminal of a differential amplifying circuit A2 via a capacitor C2. Thus, the device is composed and the outputs of the circuits A1 and A2 are inputted to the inverted input and uninverted input terminals of a differential amplifying circuit A3 via a resistance network consisting of resistances R2 and R3 and a variable resistance VR3 to offset a noise electrically, thereby outputting only a desired acoustic signal from the circuit A3.
JP9534680A 1980-07-10 1980-07-10 Amplifier for microphone Pending JPS5720088A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9534680A JPS5720088A (en) 1980-07-10 1980-07-10 Amplifier for microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9534680A JPS5720088A (en) 1980-07-10 1980-07-10 Amplifier for microphone

Publications (1)

Publication Number Publication Date
JPS5720088A true JPS5720088A (en) 1982-02-02

Family

ID=14135110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9534680A Pending JPS5720088A (en) 1980-07-10 1980-07-10 Amplifier for microphone

Country Status (1)

Country Link
JP (1) JPS5720088A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58136761A (en) * 1982-02-10 1983-08-13 Chiyuushiyou Kigyo Shinko Jigyodan Controlling method of electroless plating liquid
US6609441B1 (en) 1996-12-13 2003-08-26 Citizen Watch Co., Ltd. Indexing device
JP2009130390A (en) * 2007-11-19 2009-06-11 Funai Electric Advanced Applied Technology Research Institute Inc Voice input device, its manufacturing method and information processing system
WO2009142249A1 (en) * 2008-05-20 2009-11-26 株式会社船井電機新応用技術研究所 Voice input device and manufacturing method thereof, and information processing system
WO2009145096A1 (en) * 2008-05-20 2009-12-03 株式会社船井電機新応用技術研究所 Audio input device, method for manufacturing the same, and information processing system
US8638955B2 (en) 2006-11-22 2014-01-28 Funai Electric Advanced Applied Technology Research Institute Inc. Voice input device, method of producing the same, and information processing system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58136761A (en) * 1982-02-10 1983-08-13 Chiyuushiyou Kigyo Shinko Jigyodan Controlling method of electroless plating liquid
US6609441B1 (en) 1996-12-13 2003-08-26 Citizen Watch Co., Ltd. Indexing device
US8638955B2 (en) 2006-11-22 2014-01-28 Funai Electric Advanced Applied Technology Research Institute Inc. Voice input device, method of producing the same, and information processing system
JP2009130390A (en) * 2007-11-19 2009-06-11 Funai Electric Advanced Applied Technology Research Institute Inc Voice input device, its manufacturing method and information processing system
WO2009142249A1 (en) * 2008-05-20 2009-11-26 株式会社船井電機新応用技術研究所 Voice input device and manufacturing method thereof, and information processing system
JP2009284109A (en) * 2008-05-20 2009-12-03 Funai Electric Advanced Applied Technology Research Institute Inc Voice input device and method of manufacturing the same, and information processing system
WO2009145096A1 (en) * 2008-05-20 2009-12-03 株式会社船井電機新応用技術研究所 Audio input device, method for manufacturing the same, and information processing system
US8774429B2 (en) 2008-05-20 2014-07-08 Funai Electric Advanced Applied Technology Research Institute Inc. Voice input device, method for manufacturing the same, and information processing system

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