KR940002028Y1 - Output stabilizing circuit of audio - Google Patents

Output stabilizing circuit of audio Download PDF

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Publication number
KR940002028Y1
KR940002028Y1 KR2019910021624U KR910021624U KR940002028Y1 KR 940002028 Y1 KR940002028 Y1 KR 940002028Y1 KR 2019910021624 U KR2019910021624 U KR 2019910021624U KR 910021624 U KR910021624 U KR 910021624U KR 940002028 Y1 KR940002028 Y1 KR 940002028Y1
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contact
switch
output
relay
audio
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KR2019910021624U
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KR930016702U (en
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오희석
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주식회사 금성사
이헌조
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

내용 없음.No content.

Description

오디오기기의 출력 안정화 회로Output stabilization circuit of audio equipment

제1도 a, b도는 종래의 좌, 우측스피커 선택스위칭회로의 구성 예시도.FIG. 1 is a diagram showing a configuration of a conventional left and right speaker selection switching circuit.

제2도는 본 고안에 따른 출력 안정화 회로구성도.2 is a block diagram of the output stabilization circuit according to the present invention.

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

SW1, SW2 : 4접점스위치 1 : 스위치 동작 검출부SW1, SW2: 4-contact switch 1: Switch operation detector

2 : 릴레이 구동부 3 : 교류전원 스위칭부2: relay driving unit 3: AC power switching unit

본 고안은 오디오기기에서의 좌, 우측 스피커 선택회로에 관한 것으로서, 특히 스피커를 1조 및 2조를 연결하여 사용할때에도 일정한 출력을 얻을 수 있도록 한 출력 안정화 회로에 관한 것이다.The present invention relates to a left and right speaker selection circuit in an audio device, and more particularly, to an output stabilization circuit for obtaining a constant output even when a pair of speakers and a pair of speakers are used.

종래의 스피커 선택 스위칭회로로서는 제1도의 a에서와 같이 2접점스위치(SA1), (SB1)온시 좌, 우측스피커(SPL1, SPL2)와 (SPR1, SPR2)를 통해 음성신호(L, R)가 출력되는 동시에 스피커(SPL1, SPL2)와 (SPR1, SPR2)가 병렬로 접속된다.As a conventional speaker selection switching circuit, as shown in a of FIG. 1, the audio signals L and R are generated through the left and right speakers SPL1 and SPL2 and SPR1 and SPR2 when the two contact switches SA1 and SB1 are turned on. At the same time, the speakers SPL1 and SPL2 and SPR1 and SPR2 are connected in parallel.

이에따라 스피커의 임피던스가 8이라 가정하면 병렬접속으로 인해 부하 임피던스가 4으로 하강되어 앰프내의 출력트랜지스터용 IC가 열폭주 현상으로 인해 파괴될 위험성이 있을 뿐만 아니라 이로 인해 스피커까지도 파괴될 위험성을 갖고 있다.Accordingly, assuming that the speaker has an impedance of 8, the load impedance drops to 4 due to the parallel connection, and there is a risk that the output transistor IC in the amplifier is destroyed due to the thermal runaway phenomenon, which also causes the speaker to be destroyed.

이러한 문제점을 개선코자 하여 제1도의 b에서와 같이 2접점스위치(SA2)와 4접점스위치(SB2)를 연결하여 구성하는 것이 있으나, 이는 점점 스위치(SA2)온시 (이때 스위치(SB2)는 오프상태임) 그의 Q접점으로 입력되는 좌측신호(L) 출력이 P접점을 거쳐 스피커(SPL2)의 보이스코일을 통해 4접점스위치(SB2)의 B접점 및 C접점으로 접속되어 좌측스피커(SPL2)를 통해 음성신호가 출력된다.In order to improve such a problem, as shown in b of FIG. 1, the two-contact switch SA2 and the four-contact switch SB2 are connected to each other. The left signal (L) output to its Q contact is connected to the B contact and C contact of the 4 contact switch (SB2) through the voice coil of the speaker (SPL2) via the P contact, and through the left speaker (SPL2). Audio signal is output.

이때 우측스피커(SPR2) 역시 동작하게 된다.At this time, the right speaker (SPR2) is also operated.

만일 4접점스위치(SB2)를 온시키게 되면 오프상태인 스위치(SA2)의 2접점으로 입력되는 좌측신호(L)가 R접점을 통해 스위치(SB2)의 J접점 및 K접점으로 접속되어 좌측스피커(SPL1)를 통해 음성신호가 출력된다.If the 4 contact switch SB2 is turned on, the left signal L input to the 2 contact of the switch SA2 in the off state is connected to the J contact and the K contact of the switch SB2 through the R contact, and the left speaker ( The audio signal is output through SPL1).

이때 우측스피커(SPR1) 역시 동작하게 된다.At this time, the right speaker (SPR1) is also operated.

한편 스위치(SA2), (SB2)를 모두 온시키게 되면, 스위치(SW2)의 Q접점-P접점-스피커(SPL2)-스위치(SB2)의 B접점-A접점-D접점-E접점을 통해 스피커(SPR1)를 구동시키게 된다.On the other hand, when the switches SA2 and SB2 are turned on, the speaker is connected via the Q contact-P contact-speaker (SPL2) -switch SB2 of the switch SW2 to the B contact-A contact-D contact-E contact. To drive (SPR1).

이와같이 동작되는 종래의 다른 실시예의 구성은 앰프 또는 스피커가 파괴될 염려는 없으나 부하임피던스가 16으로 상승하게 되어 정격출력이 1/2로 저하 되는 문제점이 있었다.The configuration of another conventional embodiment operated as described above does not cause the amplifier or the speaker to be destroyed, but there is a problem that the load impedance is increased to 16 and the rated output is reduced to 1/2.

본 고안은 이러한 종래의 문제점을 해소하고자 안출된 것으로 4접점스위치, 스위치동작검출부, 릴레이구동부 및 교류전원 스위칭부로 구성되어 2조의 스피커를 연결하더라도 부하 임피던스 및 정격출력이 저하되지 않도록 하여 스피커 또는 앰프가 과부하로 인해 고장이나 파괴되는 것을 방지하고자 함을 그 목적으로 한다.The present invention is designed to solve such a conventional problem, and is composed of a four-contact switch, a switch operation detector, a relay driver, and an AC power switch, so that the load impedance and the rated output are not degraded even when two sets of speakers are connected. Its purpose is to prevent failure or destruction due to overload.

이하 본 고안은 첨부된 도면에 따라 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 고안에 따른 출력 안정화 회로 구성도를 나타낸 것으로서, 좌, 우측 오디오신호(L), (R)를 증폭하는 전력증폭기(A1)(A2)를 통한 증폭신호를 각 스피커(SPL1, SPL2), (SPR1, SPR2)에 스위칭하여 공급하는 4접점스위치(SW1, SW2)와, 상기 4접점스위치(SW1, SW2)의 온, 오프상태에 따라 논리 로우 또는 하이신호를 출력하는 스위치 동작검찰부(1)와, 상기 스위치 동작검출부(1)의 출력에 따라 릴레이(RY1)를 구동시키는 릴레이구동부(2)와, 상기 릴레이구동부(2)의 동작상태에 따라 교류2차측 유기 전압을 선택적으로 공급하도록 스위칭동작되는 교류전원스위칭부(3)를 연결하여서 구성됨을 특징으로 한다.2 is a block diagram of an output stabilization circuit according to the present invention, and the amplified signals through the power amplifiers A1 and A2 for amplifying the left and right audio signals L and R are respectively represented by the speakers SPL1 and SPL2. ), (SPR1, SPR2) and the four contact switch (SW1, SW2) for switching and supply, and the switch operation detection unit for outputting a logic low or high signal according to the on or off state of the four contact switch (SW1, SW2) (1), the relay driver 2 for driving the relay RY1 in accordance with the output of the switch operation detector 1, and the AC secondary side induced voltage selectively supplied in accordance with the operation state of the relay driver 2; It is characterized in that it is configured by connecting the AC power switching unit (3) which is switched to operate.

이와같이 된 본 고안의 동작 및 작용, 효과를 설명한다.It describes the operation, action, and effects of the present invention thus made.

먼저 스위치(SW1)가 온상태이고, 스위치(SW2)가 오프상태일 경우에는 전력 증폭기(A1)의 출력신호가 스위치(SW1)의 H, I접점을 통해 우측스피커(SPR1)에 가해지게 된다.First, when the switch SW1 is on and the switch SW2 is off, the output signal of the power amplifier A1 is applied to the right speaker SPR1 through the H and I contacts of the switch SW1.

이때 스위치(SW1)의 B접점에 가해지는 직류전원(B+)이 C접점을 통해 스위치 동작 검출부(1)내에 저항(R1)을 거쳐 앤드게이트(ICI)의 일측 입력단에 가해지고 또한 오프 상태인 스위치(SW2)의 L접점을 통해 스위치 동작검울부(1)내의 저항(R3)을 거쳐 앤드게이트(ICI)의 타측 입력단에는 로우신호가 가해지므로 앤드게이트(ICI)의 출력단에는 로우신호가 출력되어 트랜지스터(TR1)가 오프되므로 이에 따라 트랜지스터(TR2)가 오프되어 릴레이(RY1)가 구동되지 못하므로 그의 접점(C, A), (C', A')이 상호 접속된 상태를 유지하게 되어 전력 증폭기(A1), (A2)에서는 논리 하이 전압이 출력되므로 스피커(SPL1, SPL2), (SPR1, SPR2)에서는 정격 출력이 증출된다.At this time, the DC power supply B + applied to the contact B of the switch SW1 is applied to the one input terminal of the AND gate ICI through the contact R through the resistor R1 through the contact C and is turned off. Through the L contact of the switch SW2, a low signal is applied to the other input terminal of the AND gate ICI through the resistor R3 in the switch operation detection unit 1, so that a low signal is output to the output terminal of the AND gate ICI. Since the transistor TR1 is turned off, the transistor TR2 is turned off accordingly, and thus the relay RY1 cannot be driven so that its contacts C, A, C ', and A' remain connected to each other. Since the logic high voltage is output from the amplifiers A1 and A2, the rated output is extruded from the speakers SPL1 and SPL2 and SPR1 and SPR2.

또한 스위치(SW2)만을 온시킨 경우에도 상기와 같이 회로가 동작하므로 그에 대한 설명은 생략한다.In addition, since the circuit operates as described above even when only the switch SW2 is turned on, description thereof will be omitted.

한편 스위치(SW1, SW2)를 동시에 온시킨 경우에는 직류전원(B+)이 스위치(SW1)(SW2)의 각 B, K접점과 C, L접점을 통해 앤드게이트(ICI)의 그 입력단에 가해져 앤드게이트(ICI)의 출력단에는 논리하이 신호가 출력되므로 이로 인해 다이오드(D1)을 통해 트랜지스터(TR1)(TR2)을 온시키게 되어 릴레이(RY1)가 구동되므로 교류 전원스위칭부(3)내의 (C, B), (C', B') 접점이 상호 접속되어 스피커(SPL1, SPL2)와 (SPR1, SPR2)가 상호 병렬접속되므로 부하 임피던스는 4이 되는 동시에 전력증폭기(A1, A2)의 출력은 스위칭(SW1)(SW2)가 각각 온되었을 경우와 마찬가지로 일정하게 유지된다.On the other hand, when the switches SW1 and SW2 are turned on at the same time, the DC power supply B + is applied to the input terminal of the AND gate ICI through each of the B, K contacts, and the C and L contacts of the switches SW1 and SW2. Since the logic high signal is output to the output terminal of the AND gate ICI, this causes the transistors TR1 and TR2 to be turned on through the diode D1, so that the relay RY1 is driven, so that C in the AC power switching unit 3 , B), (C ', B') contacts are interconnected so that the speakers (SPL1, SPL2) and (SPR1, SPR2) are connected in parallel, so the load impedance is 4 and the outputs of the power amplifiers (A1, A2) As in the case where the switching SW1 and the SW2 are turned on, they are kept constant.

이상에서와 같이 본 고안에 의하면 스피커를 2조 연결사용시에도 1조 연결 사용시와 같이 동일한 출력을 얻을 수 있는 것이어서 앰프의 출력을 안정화시킬 수 있는 것이다.As described above, according to the present invention, even when using two pairs of speakers, the same output can be obtained as when using one pair of connections, thereby stabilizing the output of the amplifier.

Claims (1)

좌, 우측 오디오신호(L), (R)를 증폭하는 전력증폭기(A1)(A2)를 통한 증폭신호를 각 스피커(SPL1, SPL2), (SPR1, SPR2)에 스위칭하여 공급하는 4접점스위치(SW1, SW2)와, 상기 4접점스위치(SW1, SW2)의 온, 오프상태에 따라 논리 로우 또는 하이신호를 출력하는 스위치 동작검출부(1)와, 상기 스위치 동작검출부(1)의 출력에 따라 릴레이(RY1)를 구동시키는 릴레이구동부(2)와, 상기 릴레이구동부(2)의 동작상태에 따라 교류2차측 유기 전압을 선택적으로 공급하도록 스위칭 동작되는 교류전원스위칭부(3)를 연결하여서 구성됨을 특징으로 하는 오디오기기의 출력 안정화 회로.Four-contact switch for supplying the amplified signals through the power amplifiers A1 and A2 for amplifying the left and right audio signals L and R to the respective speakers SPL1 and SPL2 and SPR1 and SPR2. SW1 and SW2, a switch operation detection unit 1 for outputting a logic low or high signal in accordance with the on / off states of the four contact switches SW1 and SW2, and a relay in accordance with the output of the switch operation detection unit 1 And a relay driving unit (2) for driving (RY1) and an AC power switching unit (3) for switching operation to selectively supply the AC secondary side induced voltage according to the operating state of the relay driving unit (2). Output stabilization circuit for audio equipment.
KR2019910021624U 1991-12-06 1991-12-06 Output stabilizing circuit of audio KR940002028Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019910021624U KR940002028Y1 (en) 1991-12-06 1991-12-06 Output stabilizing circuit of audio

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Application Number Priority Date Filing Date Title
KR2019910021624U KR940002028Y1 (en) 1991-12-06 1991-12-06 Output stabilizing circuit of audio

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KR930016702U KR930016702U (en) 1993-07-29
KR940002028Y1 true KR940002028Y1 (en) 1994-04-01

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