KR900008979Y1 - Audio Mute Display Circuit - Google Patents
Audio Mute Display Circuit Download PDFInfo
- Publication number
- KR900008979Y1 KR900008979Y1 KR2019870018335U KR870018335U KR900008979Y1 KR 900008979 Y1 KR900008979 Y1 KR 900008979Y1 KR 2019870018335 U KR2019870018335 U KR 2019870018335U KR 870018335 U KR870018335 U KR 870018335U KR 900008979 Y1 KR900008979 Y1 KR 900008979Y1
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- South Korea
- Prior art keywords
- led
- mute
- volume
- light emitting
- transistor
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- 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
- H03G3/34—Muting amplifier when no signal is present
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- Control Of Amplification And Gain Control (AREA)
Abstract
내용 없음.No content.
Description
제 1a 도는 종래의 뮤트표시 회로도, 제 1b 도는 종래의 볼륨 업/다운 표시회로도.1A is a conventional mute display circuit diagram, and FIG. 1B is a conventional volume up / down display circuit diagram.
제 2 도는 본 고안의 겸용 표시 회로도.2 is a combined display circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
가 : 멀티바이브레이터 회로 나 : 겸용표시회로A: Multivibrator circuit B: Combined display circuit
NAND : 낸드게이트 INV1, INV2: 인버터NAND: NAND Gate INV 1 , INV 2 : Inverter
R1∼R12: 저항 C1: 콘덴서R 1 to R 12 : resistance C 1 : condenser
TR1∼TR3: 트랜지스터 D1∼D4: 다이오드TR 1 to TR 3 : transistors D 1 to D 4 : diodes
LED1, LED2: 발광다이오드 SW1, SW2: 스위치LED 1 , LED 2 : light emitting diode SW 1 , SW 2 : switch
본 고안은 오디오 앰프등의 볼륨을 업/다운 조정하고 음량을 일시적으로 뮤트시키는 기능을 갖고 있는 음향기기에서 볼륨조정겸용 오디오 뮤트표시회로에 관한 것이다.The present invention relates to an audio mute display circuit for volume control combined with an audio device having a function of up / down adjusting the volume of an audio amplifier or the like and temporarily muting the volume.
종래에는 볼륨을 업/다운 시키는 조절기와 음량을 일시적으로 뮤트시키는 지시기를 별도로 사용하여 표시를 하였으므로 사용자가 뮤트스위치를 온한 상태에서 소리가 적거나 안남으로 인하여 볼륨 조절기만 계속 키운상태에서 뮤트스위치를 오프(OFF)하면 갑자기 굉음이 출력되어 사용자가 놀라거나 고장으로 오인할 수 있었으며 또한 뮤트표시기를 별도로 설치하여야 되는데는 디자인 및 기기의 설계면에서 복잡한 문제점이 있었다.Conventionally, the controller is used to increase / decrease the volume and an indicator to temporarily mute the volume. Therefore, the mute switch is turned off while the mute switch is turned on. When it was turned OFF, the sound was suddenly output and the user could be mistaken or mistaken for a malfunction. Also, the mute indicator had to be installed separately.
본 고안은 상기와 같은 문제점을 해결하기 위하여 안출한 것인바, 볼륨의 업/다운 동작상태를 표시해 주는 표시기를 음량뮤트 표시기와 공유하도록 하였으며 뮤트상태의 주위를 환기시키기 위하여 뮤트표시기를 깜박이게 하여 주었으며 기기의 전면에 표시기를 별도로 설치하지 않아도 되므로 디자인 및 기기의 설계면에서도 간단하도록 개선한 회로로서 이하 첨부된 도면에 의하여 본 고안을 상세히 설명하면 다음과 같다.The present invention was devised to solve the above problems, and the indicator indicating the volume up / down operation state was shared with the volume mute indicator, and the mute indicator flashed to ventilate the surroundings of the mute state. Since the indicator does not need to be separately installed on the front of the device, the present invention will be described in detail with reference to the accompanying drawings as a circuit improved to simplify the design and design of the device as follows.
뮤트전압 입력단에 저항(R1∼R3)과 낸드게이트(NAND), 인버터(INV1), (INV2)로 연결된 멀티바이브레이터회로(가)를 구성하고 상기 멀티바이브레이터 회로(가)에 저항(R4), (R5)을 연결하여 뮤트구동 트랜지스터(TR1)의 베이스에 접속하고 상기 트랜지스터(TR1)의 콜렉터에 저항(R6), (R9), (R10)과 다이오드(D1), (D3)볼륨 업구동트랜지스터(TR2)를 연결하여 볼륨조절을 하도록 구성함과 아울러 다이오드(D2), (D4)와 발광 다이오드(LED1), (LED2), 저항(R7), (R8), (R11), (R12)음량 업/다운 스위치(SW1), (SW2)볼륨다운 구동트랜지스터(TR3)를 연결하여 볼륨조절을 하도록 연결한 겸용표시회로(나)를 연결하여 구성한 것이다.A multivibrator circuit (A) connected to a mute voltage input terminal with resistors R 1 to R 3 , a NAND gate (NAND), an inverter (INV 1 ), and (INV 2 ) is configured. R 4), (R 5 connected to connected to the base of the mute drive transistor (TR 1), a) and a resistance (R 6) to a collector of said transistor (TR 1), (R 9 ), (R 10) and a diode ( D 1 ), (D 3 ) Volume up-driven transistor (TR 2 ) is connected to the volume control and diodes (D 2 ), (D 4 ) and light-emitting diodes (LED 1 ), (LED 2 ), Resistor (R 7 ), (R 8 ), (R 11 ), (R 12 ) Volume Up / Down Switch (SW 1 ), (SW 2 ) Volume Down Drive Transistor (TR 3 ) It is composed by connecting one combined display circuit (b).
이와같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above are as follows.
정상적인 동작에서 스위치(SW1), (SW2)는 음량을 업/다운 조절한다.In normal operation, the switches SW 1 and SW 2 adjust the volume up / down.
상기 스위치(SW1)를 누르면 전원(Vss)이 저항(R10), (R9)과 다이오드(D1∼D4) 및 저항(R11)을 통하여 트랜지스터(TR3) 베이스에 인가됨으로 상기 트랜지스터(TR3)는 동작하여 볼륨다운 신호를 출력한다.When the switch SW 1 is pressed, the power supply Vss is applied to the transistor TR 3 through the resistors R 10 , R 9 , the diodes D 1 to D 4 , and the resistor R 11 . The transistor TR 3 operates to output a volume down signal.
좀더 상세하게는 스위치(SW1)를 누르면 전원(Vss)이 저항(R12)와 (R11)에 의해 트랜지스터(TR3)를 구동시키기 위한 그의 베이스와 에미터 사이에 전압이 형성된다.More specifically, pressing the switch SW 1 forms a voltage between its base and emitter for the power supply Vss to drive the transistor TR 3 by the resistors R 12 and R 11 .
즉, 트랜지스터(TR3)의 에미터 전압이 -10V이고 베이스에는 저항(R11), (R12)에 의하여 강하된 전압이 약 -4V가 된다면 트랜지스터(TR3)의 콜렉터의 전압이 0V(Open)가 되어 트랜지스터(TR3)는 구동된다.That is, if the emitter voltage of the transistor TR 3 is -10V and the voltage dropped by the resistors R 11 and R 12 at the base is about -4V, the collector voltage of the transistor TR 3 is 0V ( Open, and the transistor TR 3 is driven.
동시에 상기 다이오드(D4)를 통하여 발광다이오드(LED1)에 전류가 흐르므로 상기 발광다이오드(LED1)는 점등되어 상기 볼륨다운 스위치(SW1)를 눌렀음을 표시한다.At the same time, since a current flows through the diode D 4 through the light emitting diode LED 1 , the light emitting diode LED 1 is turned on to indicate that the volume down switch SW 1 is pressed.
이때 발광다이오드(LED1)의 밝기는 저항(R7)의 값에 의해 결정되고 따라서 상기 다이오드(D2)는 발광다이오드(LED2)로 전류가 흘러 점등되는 것을 방지시키기 위한 역할을 한다.At this time, the brightness of the light emitting diode (LED 1 ) is determined by the value of the resistor (R 7 ) and thus the diode (D 2 ) serves to prevent the current flows to the light emitting diode (LED 2 ).
반대로 스위치(SW2)를 누르면 전원(Vss)이 저항(R10), (R9)을 통하여 트랜지스터(TR2)의 어스에 인가되므로 상기 트랜지스터(TR2)는 도통되어 볼륨 업신호를 출력한다.On the contrary, when the switch SW 2 is pressed, the power supply Vss is applied to the earth of the transistor TR 2 through the resistors R 10 and R 9 , so that the transistor TR 2 is turned on to output the volume up signal. .
좀더 상세하게는 스위치(SW2)를 누르면 전원(Vss)이 저항(R10), (R9)에 의해 트랜지스터(TR2)를 구동시키기 위한 그의 베이스와 에미터 사이에 전압이 형성된다.More specifically, when the switch SW 2 is pressed, a power supply Vss forms a voltage between its base and emitter for driving the transistor TR 2 by the resistors R 10 and R 9 .
즉, 트랜지스터(TR3)의 에미터 전압이 -10V이고, 그의 베이스에는 저항(R11), (R12)에 의하여 강하된 전압이 약 -4V가 된다면 트랜지스터(TR3)의 콜렉터의 전압이 0V(Open 상태)가 되어 트랜지스터(TR3)는 구동된다.That is, if the emitter voltage of the transistor TR 3 is -10V, and the voltage dropped by the resistors R 11 and R 12 is about -4V at its base, the voltage of the collector of the transistor TR 3 becomes The transistor TR 3 is driven to 0 V (open state).
동시에 상기 다이오드(D3)를 통하여 발광다이오드(LED2)에 전류가 흐르므로 상기 발광다이오드(LED2)는 점등되어 상기 볼륨 업스위치(SW2)를 눌렀음을 표시한다.At the same time, since a current flows through the diode D 3 through the light emitting diode LED 2 , the light emitting diode LED 2 is turned on to indicate that the volume up switch SW 2 is pressed.
이때 발광다이오드(LED2)의 밝기는 저항(R8)값에 의하여 결정되고 따라서 상기 다이오드(D4)는 상기 발광다이오드(LED1)가 점등되는 것을 방지시키기 위한 역할을 한다.In this case, the brightness of the light emitting diode LED 2 is determined by the value of the resistor R 8 , and thus the diode D 4 serves to prevent the light emitting diode LED 1 from being turned on.
이때 음악을 듣고 있던중 전화통화를 하거나 옆사람과 대화를 할 때 뮤트스위치를 눌려서 소리를 일시 정지시켜야 하는데 이때에 뮤트스위치로부터 출력되는 전압이 즉 뮤트전압 단자로 부터 출력되는 전압이 멀티바이브레이터 회로(가)내의 전압이 낸드게이트(NAND)의 입력일측단자에 인가되면 상기 낸드게이트(NAND)에서는 하이신호가 출력되고, 출력된 하이신호는 저항(R4)을 통하여 트랜지스터(TR1)의 베이스에 가해져 트랜지스터(TR1)를 부도통시킴과 동시에 인버터(INV1)에 의하여 로우신호로 반전되고, 다시 인버터(INV2)에 의하여 하이신호로 반전되어 낸드게이트(NAND)의 입력타측 단자에 인가되어 상기 낸드게이트(NAND)에서는 로우신호가 출력되어 트랜지스터(TR1)를 도통시킨다.At this time, when making a phone call or talking to a person while listening to music, press the mute switch to pause the sound. At this time, the voltage output from the mute switch is the multi-vibrator circuit. A) When the voltage in the NAND is applied to one input terminal of the NAND gate, a high signal is output from the NAND gate, and the output high signal is applied to the base of the transistor TR 1 through the resistor R 4 . applied transistor barrel default the (TR 1) Sikkim and simultaneously is inverted to a low signal by the inverter (INV 1), is re-inverted to a high signal by the inverter (INV 2) is applied to input the other terminal of the NAND gate (NAND) The low signal is output from the NAND gate NAND to conduct the transistor TR 1 .
이렇게 상기 낸드게이트(NAND)의 출력단자로 로우와 하이신호가 반복하여 출력되기 때문에 트랜지스터(TR1)도 상기 낸드게이트(NAND)의 출력 하이, 로우신호에 따라 온/오프한다.Since the low and high signals are repeatedly output to the output terminal of the NAND gate, the transistor TR 1 is also turned on / off according to the output high and low signals of the NAND gate NAND.
그리하여 VDD전원은 트랜지스터(TR1)의 에미터와 콜렉터 단자 및 저항(R6), 다이오드(D1), (D2)를 통하여 발광다이오드(LED1)와 발광다이오드(LED2)에 인가되어 발광다이오드가 번갈아 가면서 점,소등하므로서 뮤트상태임을 표시하여 준다.Thus, the V DD power is applied to the light emitting diodes (LED 1 ) and the light emitting diodes (LED 2 ) through the emitter and collector terminals of the transistor (TR 1 ) and the resistors (R 6 ), diodes (D 1 ), (D 2 ). The light emitting diodes alternately turn on and off, indicating that they are muted.
이때 상기 트랜지스터(TR1)의 온/오프 동작이 상기 트랜지스터(TR2), (TR3)에 영향을 미처 음량을 변화시키는 것을 방지하기 위하여 다이오드(D3), (D4)를 역방향으로 연결한 것이다.In this case the connection is on / off operations of the transistor (TR 1) in the reverse direction to the diode (D 3), (D 4 ) in order to prevent changing the micheo volume affect the transistor (TR 2), (TR 3 ) It is.
한편, 뮤트동작을 오프시키면 뮤트전압이 낸드게이트(NAND)에 인가되지 않으므로 상기 낸드게이트(NAND)의 출력은 계속 하이레벨이 되어 트랜지스터(TR1)를 구동시키지 못하므로 볼륨 조절만 가능하게 된다.On the other hand, when the mute operation is turned off, since the mute voltage is not applied to the NAND gate NAND, the output of the NAND gate continues to be at a high level so that the transistor TR 1 cannot be driven, so only volume control is possible.
상기한 바와같이 전자볼륨의 업/다운 표시기를 이용하여 사용자가 뮤트상태임을 쉽게 알 수 있도록 뮤트표시기를 겸용시킴으로써 사용자가 모르고 볼륨을 업/다운 시킬 때 뮤트상태임을 인지시켜 줌으로써 사용자가 오류에 의한 갑작스런 소리의 커짐등에 의한 굉음을 방지시킬 수 있고, 표시기를 다목적으로 이용함으로써 디자인이나 설계를 변경시킬 필요가 없으므로 매우 경제적인 효과가 있는 것이다.As mentioned above, by using the up / down indicator of the electronic volume, the mute indicator can be used so that the user can easily know that the user is muted. It is possible to prevent the noise caused by the loudness of the sound, and it is very economical because there is no need to change the design or the design by using the indicator for multipurpose.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870018335U KR900008979Y1 (en) | 1987-10-28 | 1987-10-28 | Audio Mute Display Circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870018335U KR900008979Y1 (en) | 1987-10-28 | 1987-10-28 | Audio Mute Display Circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890009711U KR890009711U (en) | 1989-05-31 |
| KR900008979Y1 true KR900008979Y1 (en) | 1990-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870018335U Expired KR900008979Y1 (en) | 1987-10-28 | 1987-10-28 | Audio Mute Display Circuit |
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| Country | Link |
|---|---|
| KR (1) | KR900008979Y1 (en) |
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1987
- 1987-10-28 KR KR2019870018335U patent/KR900008979Y1/en not_active Expired
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| Publication number | Publication date |
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| KR890009711U (en) | 1989-05-31 |
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