KR850001777Y1 - Protective circuit for sounder - Google Patents
Protective circuit for sounder Download PDFInfo
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- KR850001777Y1 KR850001777Y1 KR2019830010029U KR830010029U KR850001777Y1 KR 850001777 Y1 KR850001777 Y1 KR 850001777Y1 KR 2019830010029 U KR2019830010029 U KR 2019830010029U KR 830010029 U KR830010029 U KR 830010029U KR 850001777 Y1 KR850001777 Y1 KR 850001777Y1
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- output current
- power
- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
- H02H1/043—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks to inrush currents
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 계통도.1 is a schematic diagram of the present invention.
제2도는 본 고안의 회로도이다.2 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 전원부 2 : 스위칭회로1: power supply 2: switching circuit
3 : 전원인가시간 지연회로 4 : 출력전류 증폭용 집적회로3: power supply time delay circuit 4: integrated circuit for output current amplification
5 : 전압감지회로 A~G : 회로접속점5: Voltage sensing circuit A ~ G: Circuit connection point
x, y, z : 출력전류 증폭용 집적회로 (4)의 외부핀x, y, z: external pins of the integrated circuit (4) for output current amplification
SP : 스피이커 SW : 전원스위치SP: Speaker SW: Power Switch
B+, B-: 동작전원B +, B -: operating power supply
본 고안은 회로단락으로 인한 충격전류나 초기전원 투입시의 과도 서지전압으로부터 음향기기의 출력회로와 스피이커를 보호할 수 있게된 전자회로에 관한 것이다.The present invention relates to an electronic circuit capable of protecting the output circuit and the speaker of an acoustic device from an impact current due to a short circuit or transient surge voltage at the initial power-on.
일반적인 음향기기에 있어서, 볼륨을 높이올린채 전원스위치를 갑자기 "온"상태로 하면 순간적인 과도 서지전합으로 인하여 스피이커에 충격잡음이 유기된다.In a typical acoustic device, when the power switch is suddenly turned "on" while the volume is turned up, shock noise is induced to the speaker due to the transient transient surge.
이 충격잡음은 듣기에도 거북할 뿐 아니라 용량이 작은 스피이커를 파열시키는 원인이 되며, 파열시 연관회로가 단락상태(Short 상태)로 되면 주변회로가 즉시 영향을 받게된다.This shock noise is not only awkward to hear, but also causes the speaker to rupture in a small capacity, and when the circuit breaks down, the surrounding circuit is immediately affected if the short circuit occurs.
본 고안은 이러한 과도 서지전압이나 스피이커 단락으로부터 음향기기의 출력회로를 보호할 수 있도록 한 것으로, 전원의 초기투입시 출력회로측에 전달되는 전원을 일정시간 지연시켜서 과도 서지 전압으로 인한 충격잡음을 방지하는 수단과 스피이커 단락시 출력회로에 인가되는 동작전원을 차단하는 수단에 의해서 상기한 목적을 달성하게 되어있다.The present invention is designed to protect the output circuit of an acoustic device from such a transient surge voltage or a speaker short circuit. When the power is initially turned on, it delays the power delivered to the output circuit for a certain time, thereby preventing shock The above object is achieved by means for preventing and means for shutting off the operating power applied to the output circuit when the speaker is short-circuited.
이하 본 고안의 구성 및 작용, 효과를 예시도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration, operation, and effects of the present invention will be described in detail with reference to the accompanying drawings.
본 고안은 통상적인 전원부(1)에서 출력되는 맥류파형을 다이오드(D1)와 콘덴서(C1)로 정류하여 스위칭회로(2)에 인가하도록 하고, 스위칭회로(2)에 전원인가시간 지연회로(3)를 연결하여서 출력전류 증폭용 집적회로(4)에 가해지는 초기전원을 일정시간 지연시키도록 하며, 스위칭회로(2)의 일단에 설치되는 충방전용 저항(R6)과 콘덴서(C2)의 일측에 전압감지회로(5)를 연결하여 스피이커(SP)의 단락시 출력전류 증폭용 집적회로(4)에 가해지는 전원을 차단시키도록 구성되어 있다.The present invention rectifies the pulse wave waveform output from the conventional power supply unit (1) to the diode (D1) and the capacitor (C1) to be applied to the switching circuit 2, the power supply time delay circuit (3) ) To delay the initial power applied to the integrated circuit 4 for output current amplification for a predetermined time, and to one side of the charge / discharge resistor R6 and the capacitor C2 installed at one end of the switching circuit 2. The voltage sensing circuit 5 is connected to cut off the power applied to the integrated circuit 4 for output current amplification when the speaker SP is shorted.
미설명부호 SW은 전원스위치, A~G는 회로접속점, x, y, z는 출력전류 증폭용 집적회로(4)의 외부핀, B+, B-는 동작전원을 나타낸다.Reference numeral SW denotes a power switch, A to G denote circuit connection points, x, y, and z denote external pins of the integrated circuit 4 for output current amplification, B + and B − denote operating power.
제1도는 상기한 구조로 되어있는 본 고안의 계통도를 나타낸 것으로서, 통상적인 전원부(1)에서는 교류전원을 정류하는 역할을 하는데 이중 반파정류된 맥류는 다이오드(D1)와 콘덴서(C1)에 의해서 직류로 정류된 후 스위칭회로(2)에 가해지고, 완전히 정류된 동작전원(B+)(B-)은 출력전류 증폭용 집적회로(4)에 인가되어 구동전원으로 사용된다. 이출력전류 증폭용 집적회로(4)는 X핀에 B-의 동작전원이 인가되어야 정상적인 동작을 실시하게 되어있다.1 is a schematic diagram of the present invention having the above-described structure, in which the conventional power supply unit 1 serves to rectify AC power. The double half-wave rectified pulsation flows directly by the diode D1 and the capacitor C1. the operation power (+ B) (B -) and then rectified is applied to the switching circuit 2, a fully rectified is applied to the output current for amplifier integrated circuit (4) is used as a driving power source. The integrated circuit 4 for amplifying this output current is normally operated only when an operating power of B − is applied to the X pin.
스위칭회로(2)에서는 정류된 직류전압으로 전원인가시간 지연회로(3)의 동작을 스위칭하여서 출력전류 증폭용 집적회로(4)에 가해지는 동작전원(B-)을 일정시간 차단시킨다.In the switching circuit 2, the operation of the power supply time delay circuit 3 is switched by the rectified DC voltage to cut off the operation power B - applied to the output current amplification integrated circuit 4 for a predetermined time.
따라서, 전원스위치(SW1)가 "온"되는 당시에는 출력전류 증폭용 지연회로(3)에 일정시간 동작전원(B-)이 인가되지 않으므로 과도 서지전압으로 인한 스피이커(SP)의 충격잡음은 방지된다.Therefore, since the operating power supply B - is not applied to the output current amplifying delay circuit 3 at a time when the power switch SW1 is "on", the impact noise of the speaker SP due to the transient surge voltage Is prevented.
만일, 스피이커(SP)가 단락이 되면 스위칭회로(2)의 일단에 마련된 콘덴서(C2)의 충전전하가 전압감지회로(5)측으로 방전되어 스위칭회로(2)와 전원인가시간 지연회로(3)가 스위칭되는데, 이때에는 동작전원(B-)이 출력전류 증폭용 집적회로(4)에 전혀 가해지지 않게되므로 스피이커(SP)주위의 주변회로는 단락에 의한 영향을 받지 않게된다.If the speaker SP is short-circuited, the charge charge of the capacitor C2 provided at one end of the switching circuit 2 is discharged to the voltage sensing circuit 5 side, so that the switching circuit 2 and the power supply time delay circuit 3 are discharged. In this case, since the operating power source B − is not applied to the integrated circuit 4 for output current amplification, the peripheral circuit around the speaker SP is not affected by a short circuit.
제2도는 제1도의 계통도를 구체적인 회로도로 나타낸 것으로, 그 동작은 다음과 같다.2 is a detailed circuit diagram of the schematic diagram of FIG. 1, and the operation thereof is as follows.
전원스위치(SW1)을 "온"시키면 콘덴서(C6)(C7)에 의해서 정류된 직류 동작전원(B-)(B-)은 출력전류 증폭용 집적회로(4)에 인가된다. 또한, 반파정류된 맥류는 다이오드(D1)와 콘덴서(C1)에 의해서 직류로 정류된 후 스위칭회로(2)에 인가된다.When "on" a power switch (SW1) rectified by a capacitor (C6), (C7), direct current operating power supply (B -), (B -) is applied to the output current for amplifier integrated circuit (4). In addition, the half-wave rectified pulse current is rectified by a direct current by the diode (D1) and the capacitor (C1) and then applied to the switching circuit (2).
따라서, 저항(R1)(R2)을 통해 트랜지스터(TR1)에 바이어스가 형성되므로 트랜지스터(TR1)는 턴-온되어 접속점(B)은 로우레벨이 된다.Accordingly, since a bias is formed in the transistor TR1 through the resistors R1 and R2, the transistor TR1 is turned on so that the connection point B is at a low level.
접속점(B)이 로우레벨로 되면 저항(R7)(R8)의 바이어스 형성에 의해 트랜지스터(TR2)역시 턴-온되어서 트랜지스터(TR3)의 베이스는 접지상태(0전위)가 된다.When the connection point B becomes low level, the transistor TR2 is also turned on by the bias formation of the resistors R7 and R8 so that the base of the transistor TR3 becomes the ground state (zero potential).
그러므로, 출력전류 증폭용 집적회로(4)의 핀에는 B-의 동작전원이 인가되지 않게되어 비동작상태를 유지한다.Therefore, the operating power of B − is not applied to the pin of the output current amplifying integrated circuit 4, thereby maintaining the inoperative state.
일정시간(대략 3-4초)이 경과하여 B-의 동작전원이 저항(R6)을 통해서 콘덴서(C2)에 완전히 충전되면 접속점(A)의 전위가 저항(R4)을 통해서 서서히 떨을진다. 본 고안에서는 R1=R4+R6으로 설정하여 놓았기 때문에 접속점(A)의 0전위(zero potentia)가 되며 이로 인하여 트랜지스터(TR1)는 턴-오프된다.When a predetermined time (approximately 3-4 seconds) elapses and the operating power source of B − is fully charged to the capacitor C2 through the resistor R6, the potential of the connection point A gradually drops through the resistor R4. In the present invention, since R1 = R4 + R6 is set, it becomes the zero potentia of the connection point A, which causes the transistor TR1 to be turned off.
트랜지스터(TR1)가 턴-오프 됨에 따라 접속점(B)(F)의 전위는 로우레벨에서 하이레벨로 전환되므로 트랜지스터(TR2)는 턴-오프되고, 콘덴서(C3)의 충전전압에 의해서 트랜지스터(TR3)는 턴-온 되며, 출력전류 증폭용 집적회로(4)의 z핀에는 B-의 동작전원이 연결되어 출력회로는 정상인 동작을 실시한다.As the transistor TR1 is turned off, the potential of the connection point B and F is switched from the low level to the high level, so the transistor TR2 is turned off and the transistor TR3 is turned on by the charging voltage of the capacitor C3. ) Is turned on, and the operation power of B − is connected to the z pin of the integrated circuit 4 for output current amplification so that the output circuit operates normally.
이상과 같이 스위칭회로(2)와 전원인가시간 지연회로(3) 및 콘덴서(C2)의 동작으로 인하여 전원스위치(SW1)를 순간적으로 "온"시킬때 발생되는 과도 서지전압은 방지된다.As described above, the transient surge voltage generated when the power switch SW1 is "on" momentarily due to the operation of the switching circuit 2, the power supply time delay circuit 3, and the capacitor C2 is prevented.
여기에서 저항에는 R2+R3<R7의 관계가 있어서 전원인가시간 지연회로(3)의 동작을 안정하게 한다.Here, the resistance has a relationship of R2 + R3 <R7 to stabilize the operation of the power supply time delay circuit 3.
스피이커(SP)의 단락시에는 다음과 같이 동작이 실시된다.When the speaker SP is shorted, the operation is performed as follows.
스피이커(SP)의 단락되면 접속점(G)은 접지되므로 콘덴서(C4)에 충전된 전하는 다이오드(D2)에 의해서 정류된 후 저항(R11)에 가해지므로 트랜지스터(TR4)는 턴-온 된다. 따라서 스위칭회로(2)에 하단의 콘덴서(C2)에 충전된 전하가 방전되므로 접속점(A)의 전위는 양(+)의 전위로되어 트랜지스터(TR1)가 턴-온 된다.When the speaker SP is shorted, the connection point G is grounded, so that the charge charged in the capacitor C4 is rectified by the diode D2 and then applied to the resistor R11, so that the transistor TR4 is turned on. Therefore, since the electric charge charged in the capacitor C2 at the lower end of the switching circuit 2 is discharged, the potential of the connection point A becomes a positive potential and the transistor TR1 is turned on.
트랜지스터(TR1)가 턴-온되면 접속점(B)은 로우레벨이 되며 이로 인하여 트랜지스터(TR2)가 턴-온되어서 트래지스터(TR3)는 턴-오프된다.When transistor TR1 is turned on, connection point B is at a low level, thereby turning transistor TR2 on and transistor TR3 is turned off.
그러므로, 출력전류 증폭용 집적회로(4)에 가해지면 B-동작 전원의 공급이 차단되어 출력회로는 비동작상태가 된다.Therefore, when applied to the output current amplifying integrated circuit 4, the supply of B − operating power is cut off and the output circuit is in an inoperative state.
즉, 스피이커(SP)의 단락즉시 스피이커(SP)주변의 출력회로는 단락의 영향을 받지않고 보호되는 것이다.That is, the short circuit of the speaker SP immediately protects the output circuit around the speaker SP without being affected by the short circuit.
상기한 바와같이 본 고안은 전원의 초기투입시 출력전류 증폭용 집적회로(4)에 가해지는 전원을 일시적으로 지연시켜서 서지전압으로부터 출력회로를 보호할 수 있으며 스피이커(SP)의 충격잡음을 방지하므로써 스피이커(SP)를 보호하는 뮤우팅 효과를 거둘 수 있다.As described above, the present invention can protect the output circuit from surge voltage by temporarily delaying the power applied to the integrated circuit 4 for output current amplification when the power is initially turned on, and prevents the shock noise of the speaker SP. By doing so, the muting effect of protecting the speaker (SP) can be achieved.
또한, 스피이커 (SP)의 단락시에도 출력전류 증폭용 집적회로(4)에 가해지는 전원을 차단시켜서 스피이커(SP)주변의 출력회로를 보호할 수 있는 장점이 있다.In addition, even when the speaker SP is shorted, the power applied to the output current amplifying integrated circuit 4 is cut off, thereby protecting the output circuit around the speaker SP.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019830010029U KR850001777Y1 (en) | 1983-11-26 | 1983-11-26 | Protective circuit for sounder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019830010029U KR850001777Y1 (en) | 1983-11-26 | 1983-11-26 | Protective circuit for sounder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR850004507U KR850004507U (en) | 1985-07-22 |
| KR850001777Y1 true KR850001777Y1 (en) | 1985-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019830010029U KR850001777Y1 (en) | 1983-11-26 | 1983-11-26 | Protective circuit for sounder |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR850001777Y1 (en) |
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1983
- 1983-11-26 KR KR2019830010029U patent/KR850001777Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR850004507U (en) | 1985-07-22 |
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