KR970002690Y1 - Constant output control and mute circuit of audio apparatus - Google Patents
Constant output control and mute circuit of audio apparatus Download PDFInfo
- Publication number
- KR970002690Y1 KR970002690Y1 KR2019910012355U KR910012355U KR970002690Y1 KR 970002690 Y1 KR970002690 Y1 KR 970002690Y1 KR 2019910012355 U KR2019910012355 U KR 2019910012355U KR 910012355 U KR910012355 U KR 910012355U KR 970002690 Y1 KR970002690 Y1 KR 970002690Y1
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- South Korea
- Prior art keywords
- output
- microphone
- input
- amplifier
- output control
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Classifications
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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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
- H03G3/341—Muting when no signals or only weak signals are present
Abstract
내용 없음.No content.
Description
제1도는 종래의 마이크의 음성신호 증폭회로도.1 is a voice signal amplification circuit of a conventional microphone.
제2도는 본 고안에 음향기기의 출력 제어장치를 나타낸 회로도.Figure 2 is a circuit diagram showing an output control device of the sound equipment in the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 뮤트부 2 : 출력제어부1: Mute section 2: Output control section
3 : 마이크잭 입력부 4,5 : 증폭부3: microphone jack input 4,5 amplifier
OP₁,OP₂,OP : 앰프 Q₁,Q₂: 트랜지스터OP₁, OP₂, OP: Amplifier Q₁, Q₂: Transistor
2R₁∼R9 : 저항 C₁∼C₄: 콘덴서2R 'to R9: Resistance C' to C ': Condenser
본 고안은 음향기기의 제어장치에 관한 것으로, 특히 마이크의 증폭회로 사용할 때 노이즈를 제거하고 S/N(신호대 잡음비)을 향상시키기에 적당하도록한 음향기기의 출력 제어장치에 관한 것이다.The present invention relates to a control device for an acoustic device, and more particularly, to an output control device for an acoustic device that is suitable for removing noise and improving S / N (signal-to-noise ratio) when using an amplifier circuit of a microphone.
종래에는 음향기기에 있어서 출력을 제어하기 위하여 제 1 도에 도시한 바와 같이 마이크 입력 잭(J)과 출력측 사이에 OP앰프(OP₁)(OP₂)와 저항(R₁∼R₄) 및 콘덴서(C₁∼C₄)를 접속하여 상기 마이크 입력 잭(J)에 마이크를 삽입하면 단자(a)와 단자(b)가 분리도고 단자(a)(c)가 연결되어서 마이크를 통한 입력이 콘덴서(C₂)와 저항(R₁)을 통하여 OP앰프(OP₁)에 입력되어 증폭된후 다시 콘덴서(C₃)와 OP앰프(OP₂)를 통하여 충분하게 증폭된 후 저항(R₄)과 콘덴서(C₄)를 통해 출력된다.Conventionally, in order to control the output in an acoustic device, as shown in FIG. 1, between the microphone input jack J and the output side, the OP amplifier OP₁ OP2, the resistors R₁-R₄, and the capacitors C₁-C₄. ), And when the microphone is inserted into the microphone input jack (J), the terminals (a) and (b) are separated and the terminals (a) and (c) are connected so that the input through the microphone is connected to the capacitor (C₂) and the resistor ( R₁) is input to the OP amplifier (OP₁) and amplified, and then amplified sufficiently through the capacitor (C₃) and OP amplifier (OP₂), and then output through the resistor (R₄) and the capacitor (C₄).
또한, 마이크를 잭(J)에 삽입하지 않았을 때에는 단자(a)와 단자(b)가 연결되어 마이크를 통한 입력이 접지로 빠지게 된다.In addition, when the microphone is not inserted into the jack (J), the terminal (a) and the terminal (b) is connected so that the input through the microphone is grounded.
그러나, 상기와 같은 종래의 회로에 있어서는 입력측이 접지되어 있어도 배선이나 기타 부품의 영향에 의해 출력측에 여러 잡음이 유기되어 S/N의 저하를 가져오게 되며, 과전원 입력시 별도의 보상회로가 없기 때문에 OP앰프(OP₁)(OP₂)가 파손되기 쉬운 결점이 있다.However, in the conventional circuit as described above, even when the input side is grounded, various noises are induced on the output side due to the influence of the wiring or other components, resulting in a decrease in S / N. As a result, the OP amplifier OPOP is easily damaged.
본 고안은 이와 같은 종래의 결점을 감안항 안출한 것으로, 본 고안의 목적은 출력제어용 트랜지스터와 뮤트용 트랜지스터를 각각 출력측에 접속함으로써 OP앰프와 출력회로를 보호함은 물론 노이즈를 제거할 수 있는 음향기기의 출력 제어장치를 제공함에 있다.The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to connect an output control transistor and a mute transistor to the output side, respectively, to protect the OP amplifier and the output circuit, as well as to remove noise. An apparatus for controlling output of a device is provided.
이하에서 이와 같은 목적을 달성하기 위한 본 고안의 실시예를 첨부된 도면 제 2 도에 의하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention for achieving such an object will be described in detail with reference to the accompanying drawings.
즉, 마이크의 잭을 음향기기에 연결하기 위한 마이크잭 입력부(3)와; 커패시터(C₁∼C₃), 저항(R₁∼R₂), 증폭기(OP₁)등으로 이루어져 마이크로부터 입력된 신호를 안정화시키고 증폭하는 제1증폭부(4)와; 저항(R₃∼R₄), 커패시터(C₄∼C5), 증폭기(OP₂)등으로 이루어져 제1증폭부(4)의 출력을 재차 증폭하는 제2증폭부(5)와; 트랜지스터(Q₂)로 이루어져 마이크 잭을 삽입되지 않을때는 출력측을 접지시키는 뮤트부(1)와; 트랜지스터(Q₁), 저항(R7∼R9)등으로 이루어져 상기 제 1, 제2증폭부(4,5)의 각 출력측과 전원(B )사이에 접속되어 관전원 입력시 출력측의 이득을 감소시켜 출력을 안정화시키는 출력제어부(2)를 포함하여 구성된다.That is, a microphone jack input unit 3 for connecting a jack of a microphone to an acoustic device; A first amplifier part 4 composed of capacitors C₁ to C₃, resistors R₁ to R₂, amplifiers OP₁, etc. to stabilize and amplify a signal input from the microphone; A second amplifier 5 which is composed of resistors R 3 to R,, capacitors C ₄ to C 5, amplifiers OP 2, and the like to amplify the output of the first amplifier 4 again; A mute part 1 composed of a transistor Q 2 and grounding the output side when the microphone jack is not inserted; It consists of a transistor Q ', resistors R 7 to R 9 , etc., and is connected between each output side of the first and second amplifiers 4 and 5 and the power supply B to reduce the gain on the output side when the tube power is input. And an output control unit 2 for stabilizing the output.
이와 같이 구성된 본 고안은 마이크 잭을 삽입하지 않았을때에는 마이크 입력 잭(J)의 단자(a)(b)가 연결되어 있어 전원(B )이 저항(R5)(R6)과 단자(a)(b)를 통해 트랜지스터(Q₂)의 베이스에 인가되므로 트랜지스터(Q₂)가 온되고, 이에 따라 제2증폭부(5)의 출력이 접지되어 아무런 출력도 나오지 않게된다.When the microphone jack is not inserted, the present invention configured as described above has the terminals (a) and (b) of the microphone input jack (J) connected so that the power source (B) is the resistor (R 5 ) (R 6 ) and the terminal (a). Since the transistor Q2 is applied to the base of the transistor Q2 through (b), the output of the second amplifier 5 is grounded so that no output comes out.
또한, 마이크 잭을 삽입하면 마이크 입력 잭(J)의 단자(a)(b)가 분리되고 단자(a)(c)가 연결되므로 트랜지스터(Q₂)의 베이스에는 로우 레벨이 인가되어 트랜지스터(Q₂)가 오프되며, 이에 따라 마이크의 입력 잭(J)을 통하여 입력된 신호가 제1, 제2증폭부(4,5)를 거쳐 출력된다.In addition, when the microphone jack is inserted, the terminals (a) and (b) of the microphone input jack (J) are separated and the terminals (a) and (c) are connected, so that a low level is applied to the base of the transistor (Q₂) so that the transistor (Q₂) Is turned off, and thus a signal input through the input jack J of the microphone is output through the first and second amplifiers 4 and 5.
한편, 전원(B )의 과입력시 저항(R7)(R8)의 전압 분압에 의해 트랜지스터(Q₁)의 베이스에 인가되는 전압에 비해 제2증폭부(5)를 통하여 출력되는 전압이 높기 때문에 [저항(R7)(R8)에 의한 전압분압 값을 기준 전압으로 설정] 트랜지스터(Q1)가 온되고, 이에 따라 저항(R₃) 및 저항(R9)이 병렬접속되게 되어 이득을 감소시키게 되므로 제2증폭부(5)의 출력을 항상 일정하게 유지할 수 있다.On the other hand, the voltage output through the second amplifier 5 is higher than the voltage applied to the base of the transistor Q 'due to the voltage division of the resistors R 7 and R 8 when the power supply B is over input. since the [resistance (R7) (R8) voltage divider to set the voltage reference value by] the transistor (Q 1) is turned on, whereby the resistance (R₃) and a resistor (R 9) thereby reducing the gain to be the parallel connection Therefore, the output of the second amplifier 5 can be kept constant at all times.
이상에서 설명한 바와 같은 본 고안은 출력측에 뮤트부를 접속하여 배선 및 기타 부품에 의해 발생하는 여러 잡음들을 모두 제거할 수 있어 S/N를 더욱더 향상시켜 과입력시 출력측에 접속된 출력제어부에 의해 이득이 제어되므로 항상 일정한 출력을 내보낼 수 있음은 물론 OP앰프를 보호할 수 있는 장점이 있다.As described above, the present invention can eliminate all the noises generated by wiring and other components by connecting the mute part to the output side, further improving the S / N, so that the gain can be improved by the output control part connected to the output side during over input. Because it is controlled, it can always output a constant output and also protects the op amp.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910012355U KR970002690Y1 (en) | 1991-08-02 | 1991-08-02 | Constant output control and mute circuit of audio apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910012355U KR970002690Y1 (en) | 1991-08-02 | 1991-08-02 | Constant output control and mute circuit of audio apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930005893U KR930005893U (en) | 1993-03-22 |
| KR970002690Y1 true KR970002690Y1 (en) | 1997-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910012355U KR970002690Y1 (en) | 1991-08-02 | 1991-08-02 | Constant output control and mute circuit of audio apparatus |
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| Country | Link |
|---|---|
| KR (1) | KR970002690Y1 (en) |
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1991
- 1991-08-02 KR KR2019910012355U patent/KR970002690Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR930005893U (en) | 1993-03-22 |
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