KR860000482Y1 - Preventing circuit of voice hum - Google Patents
Preventing circuit of voice hum Download PDFInfo
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- KR860000482Y1 KR860000482Y1 KR2019840005563U KR840005563U KR860000482Y1 KR 860000482 Y1 KR860000482 Y1 KR 860000482Y1 KR 2019840005563 U KR2019840005563 U KR 2019840005563U KR 840005563 U KR840005563 U KR 840005563U KR 860000482 Y1 KR860000482 Y1 KR 860000482Y1
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- power supply
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1607—Supply circuits
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
내용 없음.No content.
Description
첨부된 도면은 본 고안의 방지회로도이다.The accompanying drawings are prevention circuit diagrams of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 음량가변용 집적소자 VR1: 가변저항1: Volume variable integrated device VR 1 : Variable resistor
TR1,TR2: 트랜지스터 ZD1,ZD2: 정전압 다이오드TR 1 , TR 2 : Transistor ZD 1 , ZD 2 : Constant Voltage Diode
본 고안은 텔레비젼 수상기 등과 같은 기기에 있어서, 음성신호를 출력시킬 필요가 없는 경우에는 음량가변용 집적 소자에 인가되는 전원을 차단시켜 스피커로 잡음신호가 출력되지 않게 한 음성 험 방지회로에 관한 것이다.The present invention relates to a voice hum prevention circuit in a device such as a television receiver that cuts off the power applied to the volume variable integrated device when it is not necessary to output the audio signal.
일반적으로 음량가변용 집적소자를 사용하여 음량을 조절하는 텔레비젼 수상기 등과 같은 기기에 있어서는 사용자가 가변저항으로 집적소자의 음량가변단자에 인가되는 직류전압을 가변시켜 음량을 조절 즉,음량가변단자에 인가되는 전압을 높히면, 출력되는 음성신호가 작아지고, 인가되는 전압을 낮추면, 출력되는 음성신호가 커지게 구성되어 있는 바, 종래에는 텔레비젼 수상기를 컴퓨터에 연결하여 모니터로 사용할 경요와 같이 음성신호를 출력시킬 필요가 없는 경우에 집적소자의 음량가변단자에 인가되는 직류전압을 최대로 높혀도, 집적소자의 전원단자에는 계속 동작전원이 인가되어 집적회로에 전원 험 등과 같은 잡음신호가 유기되므로 음성 신호를 출력시키는 스피커에 잡음신호가 출력되어 사용자에게 심한 불쾌감을 줄 뿐만 아니라 잡음신호를 증폭시킴에 따른 전력의 소모가 발생하는 등 여러가지의 결함이 있었다.In general, in a device such as a television receiver that adjusts the volume by using a volume variable integrated device, a user adjusts the volume by varying a DC voltage applied to the volume variable terminal of the integrated device with a variable resistor, that is, is applied to the volume variable terminal. The higher the voltage, the smaller the output audio signal, and the lower the applied voltage, the larger the output audio signal. Conventionally, the audio signal is output as if the TV receiver is connected to a computer and used as a monitor. Even if it is not necessary to increase the DC voltage applied to the volume variable terminal of the integrated device to the maximum, since the operating power is continuously applied to the power supply terminal of the integrated device, noise signals such as a power hum in the integrated circuit are induced and thus a voice signal is generated. The noise signal is output to the speaker that outputs it, which not only causes a great discomfort to the user Um had a different defect such that the consumption of the power amplifier according to the Sikkim signal.
본 고안은 이와같은 종래의 결함을 감안하여, 음량가변용 집적소자의 음량가변단자에 인가되는 전압이 일정전압 이상이 되면, 집적소자의 전원단자에 인가되는 전원을 차단시켜 동작되지 않게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention, in view of such a conventional defect, when the voltage applied to the volume variable terminal of the variable-volume integrated device is a certain voltage or more, the power applied to the power supply terminal of the integrated device is shut down to be inoperative, This will be described in detail with reference to the accompanying drawings.
첨부된 도면에 도시한 바와같이 전원단자(B+)에 저항(R4) 및 가변저항(VR1)을 직렬로 접속하고, 그 가변저항(VR1)의 가변단자를 콘덴서(C3) 및 음량가변용 집적소자(1)의 음량가변단자(A)에 접속한 음량회로에 있어서, 캐소드가 상기 가변저항(VR1)의 가변단자에 접속된 정전압 다이오드(ZD1)의 애노드를 저항(R1) 및 트랜지스터(TR1)의 베이스에 공통 접속하고 트랜지스터(TR1)의 콜렉터를 저항(R2), 콘덴서(C1). 정전압 다이오드(ZD2)의 캐소드 및 트랜지스터(TR2)의 베이스에 공통접속하고, 트랜지스터(TR2)의 에미터는 저항(R3)을 통해 콘덴서(C2) 및 상기 음량가변용 집적소자(1)의 전원단자(Vp)이 공통 접속하여 구성한 것으로, 상기에서 정전압 다이오드(ZD1)는 집적소자(1)의 음량가변단자(A)에 인가되는 전압이 일정전압 이상이 될 경우에 온되게 그의 제너전압을 설정한다.As shown in the accompanying drawings, a resistor (R 4 ) and a variable resistor (VR 1 ) are connected in series to the power supply terminal (B + ), and the variable terminals of the variable resistor (VR 1 ) are condenser (C 3 ) and in eumryangga transformation integrated device (1) volume circuit connected to the volume varying terminal (a) of a cathode resistance to the anode of the zener diode (ZD 1) connected to the variable terminal of the variable resistor (VR 1) (R 1 ) and a transistor (TR 1) connected in common to the base, and the transistor (resistance (R 2) to the collector of TR 1), a capacitor (C 1). The cathode of the constant voltage diode ZD 2 and the base of the transistor TR 2 are commonly connected, and the emitter of the transistor TR 2 is connected to the capacitor C 2 and the volume variable integrated device 1 through the resistor R 3 . The power supply terminals V p are connected to each other, and the constant voltage diode ZD 1 is configured to be turned on when the voltage applied to the volume variable terminal A of the integrated device 1 becomes higher than or equal to a predetermined voltage. Set the Zener voltage.
이와 같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effect of the present invention configured in this way in detail as follows.
전원단자(B+)에 전원이 인가되면, 그 전원은 저항(R4) 및 가변저항(VR1)의 가변에 따라 분할되어 집적소자(1)의 음량가변단자(A)에 인가된다.When power is applied to the power supply terminal B + , the power is divided according to the variable of the resistor R 4 and the variable resistor VR 1 and applied to the volume variable terminal A of the integrated device 1.
여기서, 집적소자(1)의 음량가변단자(A)에 인가되는 전압이 일정전압 이하가 되게 가변저항(VR1)을 가변하면, 정전압 다이오드(ZD1)가 오프되어 트랜지스터(TR1)의 베이스에 저전위가 인가되므로 트랜지스터(TR1)가 오프되고, 이에따라 전원단자(B+)의 전원이 저항(R2)을 통해 정전압다이오드(ZD2)의 애노드 및 트랜지스터(TR2)의 베이스에 인가되어 정전압 다이오드(ZD2)가 온되고, 트랜지스터(TR2)가 온된다.Here, when the variable resistor VR 1 is changed such that the voltage applied to the volume variable terminal A of the integrated device 1 is equal to or less than a predetermined voltage, the constant voltage diode ZD 1 is turned off to turn off the base of the transistor TR 1 . Since the low potential is applied to the transistor TR 1 , the transistor TR 1 is turned off. Accordingly, the power supply of the power supply terminal B + is applied to the anode of the constant voltage diode ZD 2 and the base of the transistor TR 2 through the resistor R 2 . The constant voltage diode ZD 2 is turned on and the transistor TR 2 is turned on.
따라서, 트랜지스터(TR2)의 에미터에는 그의 콜렉터에 인가된 전원단자(B+)의 전원이 출력되고, 그 출력된 전원은 저항(R3) 및 콘덴서(C2)로 된 필터회로를 통해 집적소자(1)의 전원단자(Vp)에 인가되므로 집적소자(1)는 정상동작 즉, 가변저항(VR1)의 가변에 따라 음량가변단자(A)에 인가되는 전압에 의해 적당한 크기의 음성신호를 출력시키게 된다.Accordingly, the emitter of the transistor TR 2 outputs the power of the power supply terminal B + applied to the collector thereof, and the output power is supplied through a filter circuit composed of the resistor R 3 and the capacitor C 2 . Since the integrated device 1 is applied to the power supply terminal V p of the integrated device 1, the integrated device 1 has a proper size by a voltage applied to the volume variable terminal A according to the normal operation, that is, the variable resistor VR 1 . The audio signal is output.
다음, 집적소자(1)의 음량가변단자(A)에 인가되는 전압이 일정전압 이상이 되게 가변저항(VR1)을 가변시키면, 상기와는 반대로 정전압 다이오드(ZD1)가 온되어 트랜지스터(TR1)의 베이스에 일정 고전위가 인가되므로 트랜지스터(TR1)가 온되어 그의 콜렉터 전위가 저전위로 되고, 이에따라 트랜지스터(TR2)의 베이스에 저전위가 인가되어 트랜지스터(TR2)가 오프되므로 전원단자(B+)의 전원이 집적소자(1)의 전원단자(Vp)에지 인가되 않아 집적소자(1)는 동작하지 않게 된다.Next, when the variable resistor VR 1 is changed such that the voltage applied to the volume variable terminal A of the integrated device 1 is equal to or higher than a predetermined voltage, the constant voltage diode ZD 1 is turned on to reverse the transistor TR. 1) a constant high potential on the base application of the so is turned on its collector potential of the transistor (TR 1) and the top low potential, yiettara is applied to the low potential to the base of the transistor (TR 2), so the transistor (TR 2), the off-power source Since the power supply of the terminal B + is not applied to the power supply terminal V p of the integrated device 1, the integrated device 1 does not operate.
이상에서 설명한 바와 같이 본 고안은 집적소자(1)의 음량가변단자(A)에 인가되는 전압이 일정전압이하인 경우에는 집적소자(1)의 전원단자(Vp)에 전원이 인가되어 정상동작되고, 일정전압 이상인 경우에는 집적소자(1)의 전원단자(Vp)에 인가되는 전원을 차단시켜 집적소자(1)의 동작을 정지시키므로 음성신호가 필요없을 경우에 스피커로 잡음 신호가 출력되는 것이 방지됨은 물론 필요없는 전력의 소모를 방지하게 되는 효과가 있다.As described above, in the present invention, when the voltage applied to the volume variable terminal A of the integrated device 1 is less than a predetermined voltage, power is applied to the power supply terminal V p of the integrated device 1 to operate normally. When the voltage is higher than a predetermined voltage, the power applied to the power supply terminal V p of the integrated device 1 is cut off to stop the operation of the integrated device 1. Therefore, when a voice signal is not needed, a noise signal is output to the speaker. Of course, there is an effect to prevent the unnecessary consumption of power.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840005563U KR860000482Y1 (en) | 1984-06-14 | 1984-06-14 | Preventing circuit of voice hum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840005563U KR860000482Y1 (en) | 1984-06-14 | 1984-06-14 | Preventing circuit of voice hum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860000993U KR860000993U (en) | 1986-02-26 |
| KR860000482Y1 true KR860000482Y1 (en) | 1986-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019840005563U KR860000482Y1 (en) | 1984-06-14 | 1984-06-14 | Preventing circuit of voice hum |
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| Country | Link |
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| KR (1) | KR860000482Y1 (en) |
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1984
- 1984-06-14 KR KR2019840005563U patent/KR860000482Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR860000993U (en) | 1986-02-26 |
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