KR970013816A - AN AUTOMATIC ACTIV LOUDNESS CIRCUIT OF CAR AUDIO - Google Patents

AN AUTOMATIC ACTIV LOUDNESS CIRCUIT OF CAR AUDIO Download PDF

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Publication number
KR970013816A
KR970013816A KR1019950025377A KR19950025377A KR970013816A KR 970013816 A KR970013816 A KR 970013816A KR 1019950025377 A KR1019950025377 A KR 1019950025377A KR 19950025377 A KR19950025377 A KR 19950025377A KR 970013816 A KR970013816 A KR 970013816A
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KR
South Korea
Prior art keywords
frequency
unit
output
signal
operational amplifier
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Application number
KR1019950025377A
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Korean (ko)
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KR0145498B1 (en
Inventor
정경수
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배순훈
대우전자 주식회사
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Priority to KR1019950025377A priority Critical patent/KR0145498B1/en
Publication of KR970013816A publication Critical patent/KR970013816A/en
Application granted granted Critical
Publication of KR0145498B1 publication Critical patent/KR0145498B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/007—Protection circuits for transducers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

본 발명은 카오디오의 자동동작 라우드니스 회로에 관한 것으로, 음향기기로 부터 출력되는 신호음의 주파수를 선별하여 입력하는 신호음 선별부와, 상기 신호음 선별부에서 출력되는 일정레벨 이상의 주파수를 상쇄시키며 출력주파수의 이득을 조정하는 기준주파수를 발생하는 기준주파수 설정부와, 상기 신호음 선별부 및 기준주파수 설정부에서 출력된 신호를 연산하여 특정주파수 대역을 보상하는 라우드니스를 수행하고 이를 증폭하여 출력하는 연산증폭부와, 상기 연산증폭부에 구동전원을 공급하는 전원부와, 상기 연산증폭부의 출력신호를 궤환시켜 이상발진을 방지하는 이상발진 방지부 및 상기 연산증폭부믈 통과하여 라우드니스 동작된 신호음을 출력시키는 스피커로 이루어짐을 특징으로 하여 능동소자를 사용하여 카오디오로 부터 출력되는 신호음의 레벨을 감지하여 볼륨탭이 없이도 라우드니스가 작동되며, 주변소자를 변경함으로써 라우드니스의 주파수 및 게인의 조정을 가능하게 하는 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an autonomous loudness circuit for car audio, comprising: a signal tone selection unit for selecting and inputting a frequency of a signal sound output from an audio device, and a frequency above a predetermined level output from the signal tone selection unit to cancel the output frequency. A reference frequency setting unit for generating a reference frequency for adjusting gain, an amplifying unit for performing a loudness to compensate a specific frequency band by calculating signals output from the signal selection unit and the reference frequency setting unit, and amplifying and outputting the specific frequency band; A power supply unit for supplying driving power to the operational amplifier unit, an abnormal oscillation prevention unit for feeding back the output signal of the operational amplifier unit to prevent abnormal oscillation, and a speaker for outputting a loudness-operated signal sound through the operational amplifier unit; From the car audio using active elements By detecting the level of the tone and loudness that is operating without the volume tab, by changing the peripheral device to enable adjustment of the frequency and the gain of the loudness.

Description

카오디오의 자동동작 라우드니스 회로(AN AUTOMATIC ACTIV LOUDNESS CIRCUIT OF CAR AUDIO)AN AUTOMATIC ACTIV LOUDNESS CIRCUIT OF CAR AUDIO

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래 카오디오의 라우드니스 회로도,1 is a loudness circuit diagram of a conventional car audio,

제2도는 본 발명에 따른 카오디오의 자동동작 라우드니스 회로도.2 is an autonomous loudness circuit diagram of a car audio according to the present invention.

Claims (2)

음향기기로 부터 출력되는 신호음의 주파수를 선별하여 입력하는 신호음 선별부(10)와, 상기 신호음 선별부(10)에서 출력되는 일정레벨 이상의 주파수를 상쇄시키며 출력주파수의 이득을 조정하는 기준주파수를 발생하는 기준주파수 설정부(20)와, 상기 신호음 선별부(10) 및 기준주파수 설정부(20)에서 출력된 신호를 연산하여 특정주파수 대역을 보상하는 라우드니스를 수행하고 이를 증폭하여 출력하는 연산증폭부(30)와, 상기 연산증폭부(30)에 구동전원을 공급하는 전원부(40)와, 상기 연산증폭부(30)의 출력신호를 궤환시켜 이상발진을 방지하는 이상발진 방지부(50) 및 상기 연산증폭부(30)를 통과하여 라우드니스 동작된 신호음을 출력시키는 스피커(60)로 이루어진 것을 특징으로 하는 카오디오의 자동동작 라우드니스 회로.Signal tone selector 10 for selecting and inputting the frequency of the signal sound output from the sound device, and generating a reference frequency for adjusting the gain of the output frequency to cancel the frequency above a certain level output from the signal sound selector 10 Computing the signal output from the reference frequency setting unit 20, the signal selection unit 10 and the reference frequency setting unit 20 to perform a loudness to compensate for a specific frequency band and to amplify the output amplification unit 30, a power supply unit 40 for supplying driving power to the operational amplifier unit 30, an abnormal oscillation prevention unit 50 for preventing abnormal oscillation by feeding back the output signal of the operational amplifier unit 30, and Car loudspeaker auto-operation loudness circuit, characterized in that consisting of a speaker (60) passing through the operational amplifier unit 30 to output a loudness operation signal. 제1항에 있어서, 상기 신호음 선별부(10)는 저항(R1)과 콘덴서(C1)로 이루어져 음향기기에서 출력된 주파수중에서 저역주파수만을 선별하여 상기 연산증폭부(30)에 입력하는 저주파수 선별부(11)와, 저항(R2)과 저항(R3)으로 이루어져 음향기기에서 출력된 주파수중에서 중간음 주파수대역의 주파수만을 선별하여 상기 연산증폭부(30)에 입력하는 중간주파수 선별부(12)와, 콘덴서(C2)의 작용에 의하여 음향기기에서 출력된 주파수중에서 고음의 주파수를 상기 연산증폭부(30)에 입력하는 고역주파수 선별부(13)로 이루어진 것을 특징으로 하는 카오디오의 자동동작 라우드니스 회로.The low frequency sorting unit of claim 1, wherein the beeper selecting unit 10 comprises a resistor R1 and a condenser C1 and selects only a low frequency frequency from the frequencies output from the sound equipment and inputs it to the operational amplifier unit 30. (11) and the intermediate frequency selector 12, which consists of a resistor R2 and a resistor R3, selects only frequencies of the mid-tone frequency band among the frequencies output from the sound equipment, and inputs them to the operational amplifier 30; , A high frequency frequency selection unit 13 for inputting a high frequency frequency among the frequencies output from the sound equipment by the action of the condenser C2 to the operational amplifier unit 30. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950025377A 1995-08-18 1995-08-18 Automatic active loudness circuit of car audio KR0145498B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950025377A KR0145498B1 (en) 1995-08-18 1995-08-18 Automatic active loudness circuit of car audio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950025377A KR0145498B1 (en) 1995-08-18 1995-08-18 Automatic active loudness circuit of car audio

Publications (2)

Publication Number Publication Date
KR970013816A true KR970013816A (en) 1997-03-29
KR0145498B1 KR0145498B1 (en) 1998-08-01

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