JPS57112109A - Audio limiting amplifier - Google Patents

Audio limiting amplifier

Info

Publication number
JPS57112109A
JPS57112109A JP18822080A JP18822080A JPS57112109A JP S57112109 A JPS57112109 A JP S57112109A JP 18822080 A JP18822080 A JP 18822080A JP 18822080 A JP18822080 A JP 18822080A JP S57112109 A JPS57112109 A JP S57112109A
Authority
JP
Japan
Prior art keywords
peak
digital data
converted
amplifier
peak value
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
JP18822080A
Other languages
Japanese (ja)
Inventor
Toshiji Sasaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP18822080A priority Critical patent/JPS57112109A/en
Publication of JPS57112109A publication Critical patent/JPS57112109A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H03G7/08—Volume compression or expansion in amplifiers having semiconductor devices incorporating negative feedback

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To obtain desired characteristics, by storing a peak-to-peak value of an input signal and subjecting this value to code conversion. CONSTITUTION:The sound signal applied to an input terminal 10 is amplified to a proper level by a buffer amplifier 11 and is inputted to a variable amplifier 13. The variable amplifier 13 has the gain controlled by digital data. The output of the buffer amplifier 11 is connected to a peak-to-peak value detecting circuit 18. The peak-to-peak value is converted to digital data by an analogue-digital converting circuit 22 after being stored for a constant time. This digital data is converted to digital data for obtaining a characteristic output by a code converter 24. The gain of the variable amplifier 13 is controlled by this converted data.
JP18822080A 1980-12-27 1980-12-27 Audio limiting amplifier Pending JPS57112109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18822080A JPS57112109A (en) 1980-12-27 1980-12-27 Audio limiting amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18822080A JPS57112109A (en) 1980-12-27 1980-12-27 Audio limiting amplifier

Publications (1)

Publication Number Publication Date
JPS57112109A true JPS57112109A (en) 1982-07-13

Family

ID=16219862

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18822080A Pending JPS57112109A (en) 1980-12-27 1980-12-27 Audio limiting amplifier

Country Status (1)

Country Link
JP (1) JPS57112109A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6359109A (en) * 1986-08-29 1988-03-15 インタ−ナショナル・ビジネス・マシ−ンズ・コ−ポレ−ション Automatic gain controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6359109A (en) * 1986-08-29 1988-03-15 インタ−ナショナル・ビジネス・マシ−ンズ・コ−ポレ−ション Automatic gain controller
JPH0666615B2 (en) * 1986-08-29 1994-08-24 インタ−ナショナル・ビジネス・マシ−ンズ・コ−ポレ−ション Automatic gain control method

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