KR900006074Y1 - Over output preventing circuit against power-on - Google Patents

Over output preventing circuit against power-on Download PDF

Info

Publication number
KR900006074Y1
KR900006074Y1 KR2019870004288U KR870004288U KR900006074Y1 KR 900006074 Y1 KR900006074 Y1 KR 900006074Y1 KR 2019870004288 U KR2019870004288 U KR 2019870004288U KR 870004288 U KR870004288 U KR 870004288U KR 900006074 Y1 KR900006074 Y1 KR 900006074Y1
Authority
KR
South Korea
Prior art keywords
volume
output
resistor
flip
power
Prior art date
Application number
KR2019870004288U
Other languages
Korean (ko)
Other versions
KR880018679U (en
Inventor
이헌
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 KR2019870004288U priority Critical patent/KR900006074Y1/en
Publication of KR880018679U publication Critical patent/KR880018679U/en
Application granted granted Critical
Publication of KR900006074Y1 publication Critical patent/KR900006074Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H03G7/004—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using continuously variable impedance devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H03G7/005—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using discontinuously variable devices, e.g. switch-operated
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications

Abstract

내용 없음.No content.

Description

전원 투입시 과출력 방지회로Over output prevention circuit when power is supplied

제 1 도는 본 고안에 따른 회로도.1 is a circuit diagram according to the present invention.

제 2 도는 본 고안에 따른 제 1 도의 볼륨저항 예시도.2 is an exemplary view of the volume resistance of FIG. 1 according to the present invention.

제 3 도는 본 고안에 따른 제 1 도의 동작 파형도.3 is an operational waveform diagram of FIG. 1 according to the present invention.

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

R1∼R11: 저항 VR12∼VR13: 가변저항R 1 to R 11 : resistance VR 12 to VR 13 : variable resistance

C14-C15: 캐패시터 L16: 릴레이코일C 14 -C 15 : Capacitor L 16 : Relay coil

D17-D19: 다이오드 LED20: 발광다이오드D 17 -D 19 : Diode LED 20 : Light Emitting Diode

TR21-TR22: 트랜지스터 OP23: 연산증폭기TR 21 -TR 22 : Transistor OP 23 : Operational Amplifier

JK24: JK플립플롭JK 24 : JK flip flop

본 고안은 대출력 앰프(Amplifier)에 있어서, 볼륨(Volume)제어회로에 관한 것으로서, 특히 부주의로 볼륨을 최대로 해둔채 무의식중에 시스템이나 오디오 기기에 전원을 투입했을 경우 출력이 최대로 되는데서 발생될수 있는 기기의 무리나 청취자의 놀람을 방지할 수 있는 전원투입시 과출력 방지회로에 관한 것이다.The present invention relates to a volume control circuit in a large output amplifier, and occurs when the output is maximized when power is supplied to a system or an audio device unconsciously while the volume is inadvertently maximized. The present invention relates to an over-output protection circuit when the power is turned on to prevent a crowd of devices or a surprise of a listener.

종래에 오디오 시스템이나 기기의 대출력 증폭기에 있어서 사용자가 임의로 볼륨을 최대로 해둔채 전원을 껏다거나, 어린이의 장난에 의해 전원이 꺼진 상태에서 볼륨이 최대위치로 가 있을때 무의식중 전원을 켜면 갑자기 최대출력이 출력되어 기기의 무리가 가고, 청취자를 놀라게 하는 문제점이 있었다.In the conventional high power amplifier of an audio system or a device, when the user turns on the power with the volume set up arbitrarily, or when the volume is at the maximum position while the power is turned off due to the mischief of a child, when the power is turned on unconsciously, There was a problem that the output is output, the crowd of devices go, to surprise the listener.

따라서 본 고안은 종래의 문제점을 해결하기 위해 초기에 전원을 어떤상태에서 투입하더라도 볼륨이 소정 설정치에서 출력토록 볼륨의 상태를 디스플레이 하여 과출력을 방지할 수 있도록 하는데 그 목적이 있다.Therefore, the present invention aims to prevent overpowering by displaying the state of the volume so that the volume outputs at a predetermined set value even if the power is initially turned on in order to solve the conventional problem.

이하 본 고안을 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 고안에 따른 회로도로서 제1도중 R1-R11은 저항, VR12-VR13은 가변저항, C14-C15는 캐패시터, L16은 릴레이코일, D17-D19는 다이오드, LED20은 발광다이오드, TR21-TR22는 트랜지스터, OP23은 연산증폭기, JK24는 JK플립플롭, 2A는 프리앰프, 2B는 메인앰프, 2C는 스피커, SW1, SW2는 릴레이스위치, SW24는 스위치이며, 프리앰프(2A)와 메인앰프(2B)사이에 릴레이코일(L16)의 구동에 따라 릴레이스위치(SW1, SW2)가 전환되어 가변저항(VR12)을 통한 출력이 메인앰프(2B)나 저항(R2)을 통해 연산증폭기(OP23)의 반전단(-)으로 되고, 상기 연산증폭기(OP23)의 비반전단(+)에 전원(B+)이 저항(R4)과 가변저항(VR13)에 의해 분압되어 인가되며 연산증폭기(OP23)의 출력단이 다이오드(D19)의 애노드측에 연결된다. 그리고 JK플립플롭(JK24)의 J,K단과 전원(B+)으로 "하이"상태로 되며 또한 프리세트(PR)단이 저항(R5)과 캐패시터(C15)와 연결되고 클럭(CK)단이 전원(B+)으로부터 저항(R6)과 병렬 연결 스위치(SW24) 및 캐패시터(C24)가 접속되며 JK플립프롭(JK24)의 출력(Q)에 다이오드(D18)의 애노드측을 접속하고 상기 다이오드(D19, D18)의 캐소드를 결합하여 저항(R8)을 통해 트랜지스터(TR21)이 베이스에 접속하며 상기 트랜지스터(TR21)의 콜렉터에 저항(R10, R9)을 분합하여 트랜지스터(TR22)이 베이스에 접속하여 상기 트랜지스터(TR22)의 콜렉터에 저항(R11)을 통해 발광다이오드(LED20)의 캐소드측을 접속한다.1 is a circuit diagram according to the present invention, R 1- R 11 is a resistor, VR 12- VR 13 is a variable resistor, C 14- C 15 is a capacitor, L 16 is a relay coil, D 17- D 19 is a diode LED 20 is light emitting diode, TR 21 -TR 22 is transistor, OP 23 is operational amplifier, JK 24 is JK flip-flop, 2A is preamplifier, 2B is main amplifier, 2C is speaker, SW 1 , SW 2 is relay switch , SW 24 is a switch, the relay switch (SW 1 , SW 2 ) is switched between the preamplifier (2A) and the main amplifier (2B) in accordance with the operation of the relay coil (L 16 ) through a variable resistor (VR 12 ) The output is the inverting terminal (-) of the operational amplifier OP 23 through the main amplifier 2B or the resistor R 2 , and the power supply B + is supplied to the non-inverting terminal (+) of the operational amplifier OP 23 . The voltage is divided and applied by the resistor R 4 and the variable resistor VR 13 , and the output terminal of the operational amplifier OP 23 is connected to the anode side of the diode D 19 . The JK flip-flop (JK 24 ) and the J and K stages and the power supply (B + ) are in the "high" state, and the preset stage (PR) is connected to the resistor (R 5 ) and the capacitor (C 15 ), and the clock (CK ) where the power (B +) from the resistance (R 6) and parallel-connected switches (SW 24) and a capacitor (C 24) connected, and a diode (D 18) to the output (Q) of the JK flip-prop (JK 24) connecting the anode side and the diode transistor through a resistor (R 8) a combination of the cathode of the (D 19, D 18) ( TR 21) is connected to the base, and a resistance to the collector of the transistor (TR 21) (R 10, R and 9) the combined minutes transistor (TR 22) connected to the cathode side of the light-emitting diode (LED 20) is connected to the base via a resistor (R 11) to the collector of the transistor (TR 22).

한편 상기 트랜지스터(TR21)의 콜렉터에 저항(R3)을 통해 릴레이코일(L16)과 다이오드(D17)을 연결에 따른 릴레이코일(L16)의 구동에 따라 가변저항(VR12)의 적정 볼륨의 조정치만 릴레이 스위치(SW1, SW2)를 통해 소정이하 적정값만 메인앰프(2B)로 출력되도록 구성된다.Meanwhile, the variable resistor (VR 12) in accordance with the driving of the transistor relay coil (L 16) in accordance with the resistance (R 3) to the collector of (TR 21) to the relay coil (L 16) and a diode (D 17) connecting Only the adjustment value of the proper volume is configured to output only a predetermined value or less to the main amplifier 2B through the relay switches SW 1 and SW 2 .

제2도는 본 고안에 따른 제1도의 동작 파형도로서(a)파형은 전원온시 JK플립플롭(JK24)의 프리세트(PR)의 입력예이고, (b)파형은 스위치(SW24)온시 다이오드(D18)의 출력 파형이며, (C)파형은 음성출력 가능 상태를 보인 예이다.2 is an operating waveform diagram of FIG. 1 according to the present invention, where (a) waveform is an input example of preset PR of JK flip-flop JK 24 at power-on, and (b) waveform is switch SW 24 . It is an output waveform of the diode D 18 at ON, and the waveform (C) is an example of the voice output enabled state.

따라서 본 고안의 구체적 일실시예를 제1-3도를 참조하여 상세히 기술하면 먼저 전원을 온하면 JK플립플롭(JK24)는 저항(R5), 캐패시터(C15)에 의해 프리세트단자(PR)가 액티브 상태가 되어 "로우"에서 "하이"로 된다. 이때 초기상태를 리세트 상태로 JK플립플롭(JK24)의 출력(Q)이 "하이"상태로 있게된다. 그리고 출력(Q)은 "로우"이므로 다이오드(D18)의 출력이 "로우"가 되어 트랜지스터(TR21)가 오프 상태이며 릴레이 코일(L16)이 구동되지 않은 상태로 있게된다.Therefore, if a specific embodiment of the present invention is described in detail with reference to FIGS. 1 to 3, when the power is first turned on, the JK flip-flop (JK 24 ) is a resistor (R 5 ) and a capacitor (C 15 ) by the preset terminal ( PR) becomes active and goes from "low" to "high". At this time, the output Q of the JK flip-flop JK 24 is in a "high" state with the initial state reset. In addition, since the output Q is "low", the output of the diode D 18 becomes "low" so that the transistor TR 21 is turned off and the relay coil L 16 is not driven.

한편 저항(R1)을 통해 전원(B+)이 입력되어 가변 저항(VR12)을 거쳐 제2도와 같은 설정전위가 저항(R2)을 통해 연산증폭기(OP23)의 반전단(-)에 입력된다.On the other hand, the power supply B + is input through the resistor R 1 , and the set potential as shown in FIG. 2 through the variable resistor VR 12 is inverted (−) of the operational amplifier OP 23 through the resistor R 2 . Is entered.

이때 제2도의의 값이 제1도의값보다 클때, 즉, 볼륨의 위치가 높을 경우 연산증폭기(OP23)의 출력은 "로우"가 되어 다이오드(D19)의 출력은 "로우"가 된다.At this time, The value of When larger than the value, that is, when the position of the volume is high, the output of the operational amplifier OP 23 becomes "low" and the output of the diode D 19 becomes "low".

그러므로 트랜지스터(TR21)는 오프되어 릴레이코일(L16)은 온되지 못하므로 트랜지스터(TR22)가 온되어 발광다이오드(LED20)가 구동된다.Therefore, since the transistor TR 21 is turned off and the relay coil L 16 is not turned on, the transistor TR 22 is turned on to drive the light emitting diode LED 20 .

여기서 "OVER"를 디스플레이 하여 시청자에게 경고하므로 볼륨을 적정치로 조절하도록 하며 이때까지는 릴레이코일(L16)가 구동되지 않으므로 프리앰프(2A)의 출력은 없다. 다음 시청자가 볼륨을 적정치로 조절한 후 스위치(SW24)를 온하면 캐패시터(C14)의 충전값이 방전되면서 JK플립플롭(JK24)의 클럭(CK)의 입력이 변하므로 JK플립플롭(JK24)의 출력(Q)는 반전된다. 왜냐하면 JK플립플롭(JK24)은 JK단이 모두 "하이"로 세트되어 있을때 클럭(CK)입력의 변화에 따라 토글(Toggle)되는 특성이 있기 때문이다.Here, "OVER" is displayed to warn the viewer to adjust the volume to an appropriate value. At this time, since the relay coil L 16 is not driven, there is no output of the preamplifier 2A. When the next viewer adjusts the volume to an appropriate value and turns on the switch SW 24 , the charge value of the capacitor C 14 is discharged and the input of the clock CK of the JK flip-flop JK 24 changes so that the JK flip-flop The output Q of JK 24 is inverted. This is because the JK flip-flop JK 24 has a characteristic of being toggled according to the change of the clock CK input when the JK stages are all set to "high".

따라서 JK플립플롭(JK24)의 출력(Q)은 "하이"로 출력되어 다이오드(D18)을 통해 제2도의 (b)와 같이 "하이"상태로 된다.Therefore, the output Q of the JK flip-flop JK 24 is output as "high" and becomes "high" as shown in (b) of FIG. 2 through the diode D 18 .

이어서 트랜지스터(TR21)을 온하므로 릴레이코일(L16)을 구동하므로 릴레이 스위치(SW1, SW2)절환시킨다. 이때 프리앰프(2A)의 출력이 가변저항(VR12)에서 조정된 출력이 메인앰프(2B)를 통해 스피커(2D)로 적정 음성이 출력되며, 트랜지스터(TR21)의 콜렉터 "로우"에 의해 트랜지스터(TR22)가 오프되어 "OVER"표시를 하는 발광다이오드(LED20)도 오프된다.Since the transistor TR 21 is turned on to drive the relay coil L 16 , the relay switches SW 1 and SW 2 are switched. At this time, the output of the preamplifier 2A whose output is adjusted by the variable resistor VR 12 is output to the speaker 2D through the main amplifier 2B, and the appropriate voice is output by the collector " low " of the transistor TR 21 . The transistor TR 22 is turned off, and the light emitting diode LED 20 displaying " OVER " is also turned off.

만일 사용자가 스위치(SW24)를 누르지 않고 볼륨을 낮추면 즉,의 값이값보다 적으면 연산증폭기(OP23)의 출력이 "하이"가 되어 다이오드(D19)의 출력전위가 "하이"가 되므로 상기와 같이 동작 기능 상태(제3도-C)가 된다.If you turn down the volume without pressing the switch (SW 24 ) Has a value of If the value is smaller than the value, the output of the operational amplifier OP 23 becomes "high" and the output potential of the diode D 19 becomes "high", thereby operating state (Fig. 3 -C) as described above.

그리고 전원은 이전에 볼륨이 낮을 경우에는값이값보다 적으므로 전원 온과 동시에 정상동작 상태가 된다.And if the power was low before Value is Since it is smaller than the value, it is in the normal operation state at the same time of power-on.

상술한 바와같이 전원 투입전에 부주의로 인하여 볼륨의 상태가 최대로 되어 있다고 하더라도 볼륨의 상태를 감지하여 청취자에게 미리 경고하여 최적 조징에 의해 적정소리를 스피커로 들을 수 있으므로 기기를 보호하며 청취자가 갑자기 놀라는 것을 방지할 수 있는 잇점이 있다.As mentioned above, even if the volume is maximized due to carelessness before the power is turned on, the device detects the volume and warns the listener in advance so that the proper sound can be heard through the speaker. There is an advantage that can be prevented.

Claims (1)

프리앰프(2A)와 메인앰프(2B)을 구비한데서 볼륨 조정 가변저항(VR12)에 의해 오디오 시스템의 볼륨을 조정하는 회로에 있어서, 저항(R4)과 가변저항(VR13)에 의한 기준값과 볼륨 가변저항(VR12)으로부터 입력된 볼륨의 상태를 저항(R2)을 통해 감지하여 연산증폭기(OP23)에서 비교 검출하는 제1수단과, JK플립플롭(JK24)의 JK단을 전원(B+)으로 세팅하고 상기 전원으로부터 저항(R5)과 캐패시터(C5)에 의해 프리세트(PR)단을 세팅하며 스위치(SW24)의 조작에 따라 JK플립플롭(JK24)의 출력(Q)을 얻도록 하는 제2수단과, 상기 제1,2수단의 출력에 따라 다이오드(D18, D19)를 구동하여 트랜지스터(TR21)을 제어하는 제3수단과, 볼륨의 상태가 최대로 되었을시 상기 제3수단의 출력에 의해 트랜지스터(TR22)의 구동으로 발광다이오드(LED20)을 온하여 경고하는 제4수단과, 상기 제4수단의 경고시 볼륨을 적정치로 조정한 후 상기 제2수단 스위치(SW24)의 조작으로 제3수단에 의해 릴레이 코일(L16)이 구동하여 릴레이 스위치(SW1, SW2)온으로 적정 볼륨값만을 출력도록 구성함을 특징으로 하는 전원투입시 과출력 방지회로.In a circuit having a preamplifier 2A and a main amplifier 2B for adjusting the volume of an audio system by the volume control variable resistor VR 12 , a reference value by the resistor R 4 and the variable resistor VR 13 . And the first means for detecting the state of the volume input from the volume variable resistor VR 12 through the resistor R 2 and comparing and detecting the op amp in the operational amplifier OP 23 , and the JK terminal of the JK flip-flop JK 24 . set to the power supply (B +) and a JK flip-flop (JK 24) in response to the operation of the resistor (R 5) and capacitor sets the preset (PR) only by a (C 5) and the switch (SW 24) from said power supply Second means for obtaining output Q, third means for controlling transistor TR 21 by driving diodes D 18 and D 19 in accordance with the outputs of the first and second means, and a state of volume a fourth warning of turning on the light emitting diode (LED 20) in the driving of the transistor (TR 22) by the output of said third means is a maximum when End and, after adjusting the warning when the volume of said fourth means to a proper value and the second unit switch (SW 24) by the relay coil (L 16) driven by the third means to the operation relay switches (SW 1, the SW 2 ) Over-output prevention circuit when power is on, characterized in that it is configured to output only the proper volume value when turned on.
KR2019870004288U 1987-03-31 1987-03-31 Over output preventing circuit against power-on KR900006074Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870004288U KR900006074Y1 (en) 1987-03-31 1987-03-31 Over output preventing circuit against power-on

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870004288U KR900006074Y1 (en) 1987-03-31 1987-03-31 Over output preventing circuit against power-on

Publications (2)

Publication Number Publication Date
KR880018679U KR880018679U (en) 1988-10-29
KR900006074Y1 true KR900006074Y1 (en) 1990-06-30

Family

ID=19261131

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019870004288U KR900006074Y1 (en) 1987-03-31 1987-03-31 Over output preventing circuit against power-on

Country Status (1)

Country Link
KR (1) KR900006074Y1 (en)

Also Published As

Publication number Publication date
KR880018679U (en) 1988-10-29

Similar Documents

Publication Publication Date Title
US20100013649A1 (en) Load control device having audible feedback
KR900006074Y1 (en) Over output preventing circuit against power-on
JPS6262617A (en) Control circuit
KR940008109B1 (en) Telephone ringing control circuit
US3988642A (en) Electronic cut out for a circuit to be protected
GB2077011A (en) A bedroom light control device
KR940001479Y1 (en) Mute preventing circuit for audio
US4469940A (en) Switching apparatus for absolute position measuring device
KR900019538A (en) Driver circuit
JPH0623060Y2 (en) Volume control device
KR910004118Y1 (en) An appparatus which turns on a desk stand light
KR860000482Y1 (en) Preventing circuit of voice hum
KR940001281Y1 (en) Camcorder
JP2697006B2 (en) Output circuit
KR860001566Y1 (en) Indicator circuit of signal level and volume
JPH0317351Y2 (en)
NL8002054A (en) STRENGTH CONTROL DEVICE MORE IN PARTICULAR FOR USE IN REMOTE CONTROL.
KR860002418Y1 (en) Output signal display circuit for amp
KR800000004Y1 (en) Speed control device of a motor
US4603294A (en) Measuring device for the accurate adjustment of the start-of-measurement of a measuring transducer
SU1748242A1 (en) Amplifier-limiter
KR930005230Y1 (en) Electronic volume adjusting indicator
JPH0195643A (en) Semiconductor integrated circuit device
KR900001439Y1 (en) Volume control circuit
CA1318017C (en) Sound-responsive switching device

Legal Events

Date Code Title Description
A201 Request for examination
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