KR920002129Y1 - Audio amp for recording and playing - Google Patents

Audio amp for recording and playing Download PDF

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Publication number
KR920002129Y1
KR920002129Y1 KR2019890019382U KR890019382U KR920002129Y1 KR 920002129 Y1 KR920002129 Y1 KR 920002129Y1 KR 2019890019382 U KR2019890019382 U KR 2019890019382U KR 890019382 U KR890019382 U KR 890019382U KR 920002129 Y1 KR920002129 Y1 KR 920002129Y1
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alc
transistor
recording
amplifier
base
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KR2019890019382U
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KR910013228U (en
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연상흠
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삼성전자 주식회사
김광호
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • 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
    • H03F1/303—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters using a switching device
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)

Abstract

내용 없음.No content.

Description

녹음 및 재생용 오디오증폭기Audio Amplifiers for Recording and Playback

제 1 도는 본 고안 녹음 및 재생용 오디오증폭기의 회로도이다.1 is a circuit diagram of an audio amplifier for recording and reproducing the present invention.

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

1 : ALC 2 : 증폭기1: ALC 2: Amplifier

3 : ALC구동회로 4 : 바이어스회로3: ALC drive circuit 4: bias circuit

5 : 제어회로부5: control circuit

본 고안은 녹음 및 재생용 오디오 증폭기에 관한 것으로서, 특히 자동레벨조정기(이하 ALC라 한다)의 동작스위치 및 기능 모우드별 입력선택스위치 기능을 간단한 회로구성으로 접적회로 내부에 내장한 녹음 및 재생용 오디오증폭기에 관한 것이다.The present invention relates to an audio amplifier for recording and reproducing. In particular, the operation switch and function of the automatic level adjuster (hereinafter referred to as ALC) have a simple circuit configuration for the recording and reproducing audio in the integrated circuit. It is about an amplifier.

일반적으로 오디오 증폭기는 ALC를 구비하고 있는바, 이 ALC를 녹음 및 재생모우드에 따라 동작시키기 위해 종래에는 집적회로 외부에 스위치를 설치하여 녹음모우드시에는 스위치를 온시켜 ALC를 동작시켜서 자동으로 레벨조정을 하고, 재생모우드시는 스위치를 오프시켜 ALC가 동작하지 않도록 하였다. 뿐만 아니라 녹음 및 재생입력단을 선택하는 스위치와 궤환량 조정을 위한 스위치등도 집적회로 외부에 설치하게 됨으로서 이러한 기계적 스위치들의 조작에 의해 잡음이 발생하기 쉬웠으며, 오디오 증폭기 세트의 설계가 매우 복잡하게 된다고 하는 결점이 있었다.In general, an audio amplifier is provided with an ALC. In order to operate the ALC according to a recording and playback mode, a conventional switch is installed outside the integrated circuit. During recording mode, the switch is turned on to operate the ALC to automatically adjust the level. In the playback mode, the switch was turned off to prevent the ALC from operating. In addition, since the switches for selecting the recording and playback input stages and the switches for adjusting the feedback amount are installed outside the integrated circuit, noise is easily generated by the operation of these mechanical switches, and the design of the audio amplifier set is very complicated. There was a flaw.

본 고안은 상기한 종래 오디오 증폭기가 갖는 결점을 제거하고자 제안된 것으로, 집적화할 수 있는 간단한 회로를 구성하여 기능모우드에 따른 입력선택스위치와 ALC의 동작스위치 기능을 하도록한 녹음 및 재생용 오디오 증폭기를 제공함에 그 목적이 있다.The present invention has been proposed to eliminate the drawbacks of the conventional audio amplifier. The audio amplifier for recording and reproducing the input selection switch according to the functional mode and the operation switch function of the ALC is configured by a simple circuit that can be integrated. The purpose is to provide.

이하 본 고안의 구성 및 작용, 효과를 첨부한 도면을 참조하여 상세하게 설명한다.Hereinafter, the configuration, operation, and effects of the present invention will be described in detail with reference to the accompanying drawings.

상기한 목적을 달성하기 위한 본 고안 녹음 및 재생용 오디오증폭기는 ALC(1)와 증폭기(20), ALC구동회로(3) 및 바이어스회로(4)를 구비한 오디오 증폭기에 있어서, 저항(R21∼R32, R55)과 다이오드(D1∼D6) 및 트랜지스터(Q38, Q39, Q41∼Q46, Q56, Q61)로 제어회로부(5)를 구성하여 상기 ALC(1)에 있는 트랜지스터(Q16)의 베이스에다 제어회로부(5)의 R/P스위치(R/PSW)를 연결함과 더불어 콘덴서(C4)를 통해 상기 다이오드(D1∼D6)의 캐소드를 연결하고, 다이오드(D1, D2)의 애노드에는 상기 증폭기(2)에 있는 트랜지스터(Q17, Q19; Q18, Q20)의 베이스를 각각 연결함과 더불어 다이오드(D3, D4)의 애노드에는 트랜지스터(Q25, Q59)의 베이스를 각각 연결하며, 제어회로부(5)의 저항(R30, R31) 접속점에 ALC구동회로(3)에 있는 트랜지스터(Q29)의 베이스를 다이오드(D6)의 애노드에는 트랜지스터(Q32)의 베이스를 각각 연결하고, 상기 저항(R31)의 일단에 바이어스회로(4)에 있는 트랜지스터(Q36)의 애미터를 연결한 구성을 갖는다.The subject innovation for recording and playing of audio amplifiers for achieving the above object is according to the audio amplifier having an ALC (1) and the amplifier 20, to the ALC circuit (3) and a bias circuit 4, a resistance (R 21 The control circuit section 5 is composed of ˜R 32 and R 55 , diodes D 1 to D 6 , and transistors Q 38 , Q 39 , Q 41 to Q 46 , Q 56 , and Q 61 to form the ALC (1). ) Connects the R / P switch (R / PSW) of the control circuit section 5 to the base of the transistor Q 16 in the circuit) and connects the cathodes of the diodes D 1 to D 6 through the capacitor C 4 . connection, and the diode (D 1, D 2), the anode of a transistor (Q 17, Q 19; Q 18, Q 20) in the amplifier (2) in addition to also connected the base of each diode (D 3, D 4 Is connected to the base of transistors Q 25 and Q 59 , respectively, and the base of transistor Q 29 in the ALC drive circuit 3 is connected to the resistors R 30 and R 31 of the control circuit section 5. Die De (D 6) anode is connected to the base of the transistor (Q 32) each, and has one end configured connecting a hard meter of the transistor (Q 36) in the biasing circuit 4 to the resistance (R 31) .

제 1 도는 본 고안 녹음 및 재생용 증폭기의 회로도인바, 먼저 녹음모우드인 경우, 즉 제어회로부(5)에 있는 R/P스위치(P/PSW)가 단자(REC)에 접속된 경우에는 에미터커플구성을 이루는 트랜지스터(Q41, Q42), (Q43, Q44), (Q45, Q46)는 베이스전압에 따라 양자택일 동작하기 때문에 단자(REC)전압이 하이레벨이면 트랜지스터(Q42, Q44, Q45)가 턴온되고, 트랜지스터(Q41, Q43, Q46)는 턴오프된다. 그에 따라 증폭기(2)에 있는 트랜지스터(Q18, Q20)는 제어회로부(5)의 다이오드(D2)와 전류원으로서 동작하여 바이어스가 유지되나 증폭기(2)의 트랜지스터(Q17, Q19)는 제어회로부(5)에 있는 트랜지스터(Q41)의 턴오프로 동작하지 않게 되어 입력선택스위치로 동작하게 된다. 이와 마찬가지로 동작으로 증폭기(2)의 트랜지스터(Q59)는 출력선택스위치로 동작하게 된다.1 is a circuit diagram of an amplifier for recording and reproducing the present invention. First, in the recording mode, that is, when the R / P switch P / PSW in the control circuit part 5 is connected to the terminal REC, Since the transistors Q 41 , Q 42 , Q 43 , Q 44 , and Q 45 , Q 46 constitute alternative operations depending on the base voltage, the transistor Q 42 is provided when the terminal REC voltage is high level. , Q 44 , Q 45 are turned on, and transistors Q 41 , Q 43 , Q 46 are turned off. Accordingly, the transistors Q 18 , Q 20 in the amplifier 2 operate as a current source with the diode D 2 of the control circuit section 5 so that the bias is maintained, but the transistors Q 17 , Q 19 of the amplifier 2 are maintained. Does not operate by turning off the transistor Q 41 in the control circuit section 5, thereby operating as an input selection switch. In a similar manner, the transistor Q 59 of the amplifier 2 operates as an output selection switch.

또한 상기 트랜지스터(Q46)의 턴오프로 ALC구동회로(3)에 있는 트랜지스터(Q32)가 턴오프되어 저항(RD)과 콘덴서(CD)에 충전된 전압에 의해 ALC(1)에 있는 트랜지스터(Q21)가 동작하게 되고, 그에 따라 ALC(1)가 동작하게 된다.In addition, by turning off the transistor Q 46 , the transistor Q 32 in the ALC driving circuit 3 is turned off, and is supplied to the ALC 1 by the voltage charged in the resistor R D and the capacitor C D. Transistor Q 21 is operated and ALC 1 is operated accordingly.

한편, 제어회로부(5)에 있는 R/P스위치(R/PSW)가 단자(PLAY)에 접속된 재생모우드인 경우에는 상기한 녹음모우드와는 반대로 단자(PLAY)가 하이레벨로 되어 제어회로부(5)의 트랜지스터(Q41, Q45, Q46)가 턴온되고, 트랜지스터(Q42, Q44, Q45)는 턴오프된다. 그러므로 트랜지스터(Q41)의 턴온으로 증폭기(2)에 있는 트랜지스터(Q17, Q19, Q25)는 입력 및 출력선택스위치로 동작하게 되며, 녹음입출력선택스위치로서 동작하는 트랜지스터(Q18, Q20, Q59)는 턴오프되어 동작하지 않게 된다.On the other hand, in the case where the R / P switch R / PSW in the control circuit section 5 is a playback mode connected to the terminal PLAY, the terminal PLAY becomes high level in contrast to the recording mode described above, and the control circuit section ( Transistors Q 41 , Q 45 , Q 46 of 5 ) are turned on, and transistors Q 42 , Q 44 , Q 45 are turned off. Therefore, by turning on transistor Q 41 , transistors Q 17 , Q 19 , Q 25 in amplifier 2 operate as input and output selection switches, and transistors Q 18 and Q as recording input / output selection switches. 20 , Q 59 ) is turned off and does not operate.

이와 동시에 트랜지스터(Q46)의 턴온으로 ALC구동회로(3)에 있는 트랜지스터(Q32)가 턴온되어 제어회로부(5)의 다이오드(D6)와 전류원으로서 동작하나 ALC구동회로(3)의 저항(R14)에 의한 전압강하로 트랜지스터(Q32)가 포함되고, 이 때 트랜지스터(Q32)의 컬렉터 전위 즉, ALC(1) 구동전압이 VCEsat 0.1 V로 되어 ALC(1)는 동작하지 않게 된다.At the same time, the transistor Q 32 of the ALC driver circuit 3 is turned on by turning on the transistor Q 46 to operate as a diode D 6 and a current source of the control circuit part 5, but the resistance of the ALC driver circuit 3 is reduced. A transistor Q 32 is included in the voltage drop caused by R 14 , and at this time, the collector potential of the transistor Q 32 , that is, the driving voltage of the ALC 1 becomes V CE sat 0.1 V so that the ALC 1 operates. You will not.

상기한 바와 같이 작용하는 본 고안은 집적화 할 수 있는 간단한 회로구성으로 기능모우드에 따른 트랜지스터의 스위칭 동작으로 입출력선택스위칭 및 ALC의 동작스위칭 기능을 하게 되므로 접적회로 외부의 기계적 스위치 조작에 따른 잡음 및 불편함을 제거하고, 세트설계가 용이할 뿐만 아니라 제품의 원가가 절감되는 효과가 있다.The present invention, which operates as described above, functions as an input / output selection switching and an ALC operation switching function by switching a transistor according to a functional mode with a simple circuit configuration that can be integrated. Eliminating the box, the set design is easy, and the cost of the product is reduced.

Claims (1)

ALC(1)와 증폭기(2), ALC구동회로(3) 및 바이어스회로(4)를 구비한 오디오증폭기에 있어서, 저항(R21∼R32, R55)과 다이오드(D1∼D6) 및 트랜지스터(Q38, Q39, Q41∼Q46, Q56, Q61)로 제어회로부(5)를 구성하여 상기 ALC(1)에 있는 트랜지스터(Q16)의 베이스에 제어회로부(5)의 R/P스위치(R/PSW)를 연결함과 더불어 콘덴서(C4)를 통해 상기 다이오드(D1∼D6)의 캐소드를 연결하고, 다이오드(D1, D2)의 애노드에는 상기 증폭기(2)에 있는 트랜지스터(Q17, Q19; Q18, Q20)의 베이스를 각각 연결함과 더불어 다이오드(D3, D4)의 애노드에는 트랜지스터(Q25, Q59)의 베이스를 각각 연결하며, 제어회로부(5)의 저항(R30, R31) 접속점에 ALC구동회로(3)에 있는 트랜지스터(Q29)의 베이스를 다이오드(D6)의 애노드에는 트랜지스터(Q32)의 베이스를 각각 연결하고, 상기 저항(Q31)의 일단에 바이어스회로(4)에 있는 트랜지스터(Q36)의 에미터를 연결한 녹음 및 재생용 오디오 증폭기.In an audio amplifier having an ALC (1), an amplifier (2), an ALC drive circuit (3), and a bias circuit (4), resistors R 21 to R 32 and R 55 and diodes D 1 to D 6 And a control circuit section 5 composed of transistors Q 38 , Q 39 , Q 41 to Q 46 , Q 56 , Q 61 , and the control circuit section 5 at the base of the transistor Q 16 in the ALC 1. The R / P switch (R / PSW) of the connection and the cathode of the diode (D 1 ~ D 6 ) through the capacitor (C 4 ), and the anode of the diode (D 1 , D 2 ) to the amplifier 2, transistors in the (Q 17, Q 19; Q 18, Q 20) also connected to the base of each and with a diode (D 3, D 4) to the base of the anode of a transistor (Q 25, Q 59) each The base of the transistor Q 29 in the ALC drive circuit 3 at the connection point of the resistors R 30 , R 31 of the control circuit section 5 to the anode of the diode D 6 at the base of the transistor Q 32 . Connect each of the above, Wherein (Q 31) once the recording and playing of an audio amplifier for connecting the emitter of the transistor (Q 36) in the biasing circuit 4 to the.
KR2019890019382U 1989-12-20 1989-12-20 Audio amp for recording and playing KR920002129Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200216096Y1 (en) * 2000-08-25 2001-03-15 삼부크러치주식회사 Health bags

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200216096Y1 (en) * 2000-08-25 2001-03-15 삼부크러치주식회사 Health bags

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