KR900005444Y1 - Mixing level adjusting cicuit for a microphone - Google Patents

Mixing level adjusting cicuit for a microphone Download PDF

Info

Publication number
KR900005444Y1
KR900005444Y1 KR2019860021946U KR860021946U KR900005444Y1 KR 900005444 Y1 KR900005444 Y1 KR 900005444Y1 KR 2019860021946 U KR2019860021946 U KR 2019860021946U KR 860021946 U KR860021946 U KR 860021946U KR 900005444 Y1 KR900005444 Y1 KR 900005444Y1
Authority
KR
South Korea
Prior art keywords
microphone
music
signal
output
input
Prior art date
Application number
KR2019860021946U
Other languages
Korean (ko)
Other versions
KR880014319U (en
Inventor
고정환
황인욱
Original Assignee
삼성전자 주식회사
한형수
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 삼성전자 주식회사, 한형수 filed Critical 삼성전자 주식회사
Priority to KR2019860021946U priority Critical patent/KR900005444Y1/en
Publication of KR880014319U publication Critical patent/KR880014319U/en
Application granted granted Critical
Publication of KR900005444Y1 publication Critical patent/KR900005444Y1/en

Links

Classifications

    • 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
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, 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
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

내용 없음.No content.

Description

마이크 믹싱레벨 자동조절회로Microphone mixing level automatic control circuit

제1도는 본 고안의 블럭도.1 is a block diagram of the present invention.

제2도는 본 고안의 상세한 회로도이다.2 is a detailed circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 음악이득조절엠프 20 : 음악포락선검출기10: music gain control amplifier 20: music envelope detector

30 : 감산부 40 : 프리앰프30: subtraction part 40: preamp

50 : 마이크이득 조절앰프 60 : 마이크포락선검출기50: microphone gain control amplifier 60: microphone envelope detector

70 : 가산기70: adder

본 고안은 마이크 믹싱(Mixing)레벨 자동조절회로에 관한 것이다.The present invention relates to a microphone mixing level automatic control circuit.

종래의 마이크 믹싱회로에서는 마이크 입력에 대하여 음악의 입력레벨을 수동으로 조절하게 되어 있어 음악의 세기가 변화함에 따라 충분히 대용되지 않음으로 해서 간단한 마이크믹싱의 경우에도 레벨의 정확한 조절이 안되는 결점이 있었다.In the conventional microphone mixing circuit, the input level of the music is manually adjusted with respect to the microphone input, so that the level of the music is not sufficiently substituted as the strength of the music changes.

따라서, 본 고안의 목적은 상기한 결점을 해결하기 위해 안출한 것으로서, 음악의 세기에 따라 자동적으로 마이크의 입력단 증폭기의 이득을 조절하여서 적절한 믹싱레벨을 얻음으로서 보다 양질의 마이크믹싱이 이루어지도록 하는 회로를 제공하는 데 있다.Accordingly, an object of the present invention is to solve the above-mentioned drawbacks, and to adjust the gain of the input amplifier of the microphone automatically according to the strength of the music to obtain an appropriate mixing level so that a better microphone mixing is achieved. To provide.

이하 첨부도면에 의거하여 본 고안의 실시예를 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 고안의 블럭도로서, 소스 인(Source In) 단자를 통해 인가되는 음악입력은 음악이득조절앰프(10)를 통해서 적당한 레벨로 조절되어지고, 이 음악이득 조절앰프(10)에서 출력되는 신호는 음악포락선검출기(20)와 가산기(70)에 인가되여, 음악포락선검출기(20)와 가산기(70)에 인가되며, 음악포락선검출기(20)에서 검출되어진 음악입력의 레벨은 감산기(30)에 인가된다.1 is a block diagram of the present invention, the music input applied through the Source In terminal is adjusted to an appropriate level through the music gain control amplifier 10, the output from the music gain control amplifier 10 The signal is applied to the music envelope detector 20 and the adder 70, and is applied to the music envelope detector 20 and the adder 70, and the level of the music input detected by the music envelope detector 20 is the subtractor 30. Is applied.

그리고, 마이크를 통해 입력되는 마이크입력신호는AGC입력을 가진 프리엠프(40)에 인가되고, 이 프리앰프(40)에서 증폭되어 출력되는 신호는 마이크이득조절앰프(50)와 상기한 가산기(70)에 인가되며, 이 마이크이득조절앰프(50)의 출력신호로 마이크포락선검출기(60)를 거쳐서 신호레벨의 강도가 검출되어 상기한 감산기(30)에 입력되고, 이 강산기(30)에서는 음악입력신호와 마이크입력신호의 차이를 검출하여서 그 차전압을 중폭하여 프리앰프(40)에 인가되도록 연결한다.The microphone input signal input through the microphone is applied to the preamplifier 40 having the AGC input, and the signal amplified and output from the preamplifier 40 is the microphone gain control amplifier 50 and the adder 70. The intensity of the signal level is detected through the microphone envelope detector 60 as the output signal of the microphone gain control amplifier 50 and input to the subtractor 30. The difference between the input signal and the microphone input signal is detected, and the difference voltage is amplified and connected to the preamplifier 40.

제2도는 본 고안의 상세한 회로도로서, 음악이득조절앰프(10)는 저항(R1,R2)과 콘덴서(C1,C2) 연산증폭기(OP1)로 구성되고, 음악포락선검출기(20)는 다이오드(D1)와 저항(R3) 및 콘덴서(C3)로 구성되며, 감산기(30)는 저항(R5-R8)과 연산증폭기(OP2)로 구성된다.2 is a detailed circuit diagram of the present invention, the music gain control amplifier 10 is composed of a resistor (R 1 , R 2 ) and a capacitor (C 1 , C 2 ) operational amplifier (OP 1 ), the music envelope detector (20) ) Is composed of a diode (D 1 ), a resistor (R 3 ) and a capacitor (C 3 ), the subtractor 30 is composed of a resistor (R 5 -R 8 ) and the operational amplifier (OP 2 ).

그리고, 마이크이득조절앰프(50)는저항(R9,R10)과 콘덴서(C6)및 연산증폭기(OP3)로구성되고, 마이크포락선 검출기(60)는 콘덴서(C4,C5)와 저항(R4) 및 다이오드(D2)로 구성된다.The microphone gain control amplifier 50 includes resistors R 9 and R 10 , a capacitor C 6 , and an operational amplifier OP 3 , and the microphone envelope detector 60 includes capacitors C 4 and C 5 . And a resistor (R 4 ) and a diode (D 2 ).

소스 인단자에 입력되는 음악입력신호는 연산증폭기(OP1)에 입력되면서 가변저항(R2)에 의해서 증폭이득을 조절하여 출력되게 한 다음, 콘덴서(C1,C2)에 의해 직류전압 성분이 다음단에 가해져서 오동작을 하지 않도록한다.The music input signal input to the source input terminal is input to the operational amplifier OP 1 to be output by adjusting the amplification gain by the variable resistor R 2 and then the DC voltage component by the capacitors C 1 and C 2 . This step is applied to prevent malfunction.

이때, 다이오드(D1)와 저항(R3) 및 콘덴서(C3)로 구성된 음악포락선검출기(20)에 의해서 입력신호의 레벨을 검출한다.At this time, the level of the input signal is detected by the music envelope detector 20 composed of the diode D 1 , the resistor R 3 , and the capacitor C 3 .

또한, 상기한 검출신호는 감산용 연산증폭기(OP2)의 비반전단지에 인가되는 데, 마이크입력신호가 AGC의 프리앰프(40)를 거쳐 연산증폭기(OP3)에 인가되면서 가변저항(R9)에 의해 이득이 조절되고, 이 증폭이득이 조절이 되게 하는 마이크이득조절앰프(50)는 음악입력 신호와 마이크입력신호와의 레벨차이를 조절하여 자동믹싱 레벨제어 범위를 맞춰주기 위한 것으로서 출력신호는 마이크포락선 검출기(60)를 통해 감산용 연산증폭기(OP2)의 반전단자에 인가된다.In addition, the detection signal is applied to the non-inverting terminal of the subtraction operational amplifier OP 2. The microphone input signal is applied to the operational amplifier OP 3 via the preamplifier 40 of the AGC, and the variable resistor R 9. The gain is adjusted by the control panel, and the microphone gain control amplifier 50 which adjusts the gain of the amplification gain is to adjust the level difference between the music input signal and the microphone input signal to match the automatic mixing level control range. Is applied to the inverting terminal of the operational amplifier OP 2 for subtraction through the microphone envelope detector 60.

이때, 상기 연산증폭기(OP2)에서는 두 입력신호의 차이를 검출하는데, 각각의 포락선 검출기신호의 차가 증폭되므로 음악입력신호와 마이크입력의 차가 클수록 출력신호가 크게 증폭되어 출력된다.In this case, the operational amplifier OP 2 detects a difference between the two input signals. Since the difference between the respective envelope detector signals is amplified, the greater the difference between the music input signal and the microphone input, the larger the output signal is amplified and output.

즉, 음악입력이 커지면 프리앰프(40)의 AGC입력에 걸리는 전압이 커져서 AGC입력을 가진 프리앰프의 증폭도 커져 음악입력과 마이크입력신호의 차이를 줄여주게 되어 있다.That is, as the music input increases, the voltage applied to the AGC input of the preamplifier 40 increases, so that the amplification of the preamp having the AGC input also increases, thereby reducing the difference between the music input and the microphone input signal.

따라서, 두 입력신호간의 적당한 레벨의 차를 유지할 수 있도록 되어 있어서, 두 입력신호는 가산기(70)에 의해 믹싱된다.Thus, it is possible to maintain an appropriate level difference between the two input signals, so that the two input signals are mixed by the adder 70.

이상과 같이 본 고안에 하면 음악입력레벨의 변화에 따라 마이크의 증폭도를 자동으로 변화시켜서 항상 적정 레벨의 마이크믹싱의 효과를 높일 수 있다.As described above, according to the present invention, the microphone amplification degree is automatically changed according to the change of the music input level, so that the effect of microphone mixing at an appropriate level can always be enhanced.

Claims (1)

음악입력신호를 연산증폭기(OP1)의 반전단자 입력으로하여 가변저항(R2)에 따라 적정레벨의 증폭이득을 갖도록 출력시키는 음악이득조절앰프(10)와, 상기한 앰프(10)의 출력신호의 포락선을 얻도록 다이오드(D1), 저항(R3) 및 콘덴서(C3)로 구성된 음악포락선 검출기(20)와, 상기한 음악포락선검출기(20)의 음악신호를 연산증폭기(OP2)의 비반전단자에 입력하고 마이크 포락선검출기(60)에서 출력되는 마이크입력신호를 반전단자에 입력하여 두 신호의 차를 경출하는 감산기(30)와, 마이크입력신호를 인가하고, 상기 감산기(30) 출력을 AGC 단자에 인가하여 감산기(30)의 출력신호에 따라 증폭되게 하는 프리앰프(40)와, 프리앰프(40)의 출력신호를 연산증폭기(OP3)의 반전단자에 인가하여 가변저항(R9)에 따라 적정레벨의 증폭이득을 갖도록 하는 마이크 이득조절앰프(50)와, 상기하 마이크이득조절앰프(50)의 출력신호에서 다이오드(D2), 콘덴서(C4, C5) 및 저항(R4)으로 마이크의 레벨을 검출하는 마이크포락선 검출기(60)와, 상기한 음악이득조절앰프(10)와 프리앰프(40)의 출력신호를 믹싱하는 가산기(70)를 통해 믹싱신호가 출력되도록 연결한 것을 특징으로 하는 마이크 믹싱레벨 조절회로.A music gain control amplifier 10 for outputting a music input signal as an inverting terminal input of the operational amplifier OP 1 to have an amplification gain of a proper level according to the variable resistor R 2 , and the output of the amplifier 10 described above. A music envelope detector 20 composed of a diode D 1 , a resistor R 3 , and a capacitor C 3 so as to obtain an envelope of the signal, and the music signal of the music envelope detector 20 described above are operated by an operational amplifier OP 2. A subtractor 30 for inputting the non-inverting terminal of the terminal and outputting the difference between the two signals by inputting the microphone input signal output from the microphone envelope detector 60 to the inverting terminal, and applying a microphone input signal to the subtractor ( 30) The output signal of the preamplifier 40 is applied to the inverting terminal of the operational amplifier OP 3 by applying the output to the AGC terminal and amplified according to the output signal of the subtractor 30. Microphone gain to ensure proper gain of amplification depending on resistance (R 9 ) Microphone envelope detector for detecting the level of the microphone with the diode (D 2 ), the capacitor (C 4 , C 5 ) and the resistor (R 4 ) in the output signal of the control amplifier 50 and the microphone gain control amplifier 50 below. 60, and a microphone mixing level control circuit connected to output a mixing signal through an adder 70 for mixing the output signals of the music gain control amplifier 10 and the preamplifier 40.
KR2019860021946U 1986-12-30 1986-12-30 Mixing level adjusting cicuit for a microphone KR900005444Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860021946U KR900005444Y1 (en) 1986-12-30 1986-12-30 Mixing level adjusting cicuit for a microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860021946U KR900005444Y1 (en) 1986-12-30 1986-12-30 Mixing level adjusting cicuit for a microphone

Publications (2)

Publication Number Publication Date
KR880014319U KR880014319U (en) 1988-08-31
KR900005444Y1 true KR900005444Y1 (en) 1990-06-18

Family

ID=19258634

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019860021946U KR900005444Y1 (en) 1986-12-30 1986-12-30 Mixing level adjusting cicuit for a microphone

Country Status (1)

Country Link
KR (1) KR900005444Y1 (en)

Also Published As

Publication number Publication date
KR880014319U (en) 1988-08-31

Similar Documents

Publication Publication Date Title
US4216434A (en) Variable gain alternating voltage amplifier
ATE113781T1 (en) NOISE REDUCTION CIRCUITS.
US4966160A (en) Acoustic admittance measuring apparatus with wide dynamic range and logarithmic output
KR900005444Y1 (en) Mixing level adjusting cicuit for a microphone
JPH02250564A (en) Clamp device and automatic gain controller
KR880005745A (en) Automatic Gain Control Method of Control Circuit and Its Circuit
KR101043222B1 (en) Dc-compensation loop for variable gain amplifier
KR890013917A (en) FM receiver
US4471311A (en) Detector circuit having AGC function
JP2674110B2 (en) Temperature compensation circuit for avalanche photodiode bias circuit
KR910015181A (en) Outline emphasis circuit of color signal
KR900006544Y1 (en) Auto-control circuit of audio output level
KR950022892A (en) Automatic Gain Control Circuit of Image Processing System
KR930011405A (en) V-Cal audio playback level automatic control circuit
JPS5748812A (en) Amplifier
KR100208184B1 (en) Ynr automatic control device of vcr
KR100664299B1 (en) Audio amp
KR940005813Y1 (en) Shumitt trigger variable level circuit of control signal
KR900010832Y1 (en) Mic noise removing circuit
KR860003235Y1 (en) Voltage interface circuit
SU1043736A2 (en) Device for controlling volume of sound
JPH05315961A (en) A/d conversion circuit
KR900001440Y1 (en) Automatic gain control circuit
KR920015953A (en) Audio signal balance correction circuit
JPH0567930A (en) Voltage amplifier circuit

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19970829

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee