KR970003983B1 - Selecting circuit for a.r.s. - Google Patents

Selecting circuit for a.r.s. Download PDF

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Publication number
KR970003983B1
KR970003983B1 KR1019930028360A KR930028360A KR970003983B1 KR 970003983 B1 KR970003983 B1 KR 970003983B1 KR 1019930028360 A KR1019930028360 A KR 1019930028360A KR 930028360 A KR930028360 A KR 930028360A KR 970003983 B1 KR970003983 B1 KR 970003983B1
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South Korea
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ring
signal
speaker
terminal
circuit
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KR1019930028360A
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Korean (ko)
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KR950022580A (en
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이석근
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삼성전자 주식회사
김광호
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephone Function (AREA)

Abstract

The present invention is to provide an apparatus for performing speech selection in an automatic answering telephone, responsive to power applying. The apparatus for performing speech selection according to the present invention comprises: a ringing means(40) for generating a ring signal when a local ring is incoming; a speaker(SP10); a transducer(TR) coupled between said ringing means(40) and said speaker(SP10); a transducer controlling means(60) for floating said transducer; a ring signal sensing means(50) for sensing incoming of the ring signal and for generating ring sensing signal when the power is applied and the ring signal is generated in said ringing means; a central processing unit(30) for outputting a ring tone responsive to the ring sensing signal; and an amplifying means for amplifying the ring tone and outputting an amplified ring tone to said speaker. Thereby, the speech selecting apparatus in accordance with the present invention can be easily and costly implemented.

Description

자동응답전화기의 선별통화회로Selective call circuit of answering machine

제1도는 종래의 선별통화회로의 회로도.1 is a circuit diagram of a conventional selective call circuit.

제2도는 본 발명에 따른 선별통화회로의 회로도.2 is a circuit diagram of a selective call circuit according to the present invention.

본 발명은 자동응답전화기에서 선별통화기능을 수행하는 장치에 관한 것이다.The present invention relates to an apparatus for performing a selective call function in an answering machine.

일반적으로 자동응답전화기에서는 외부로부터 링신호가 들어왔을 때 전원전압의 인가유무를 감지한 다음, 전원전압이 인가된 상태에서는 자동으로 전화루프를 형성하고 비밀번호의 유,무를 링신호 유,무를 수행하고 그렇지 않은 경우에는 링신호만을 송출한다. 이러한 자동응답전화기의 기능을 선별통화기능이라고 한다.In general, an answering machine detects the presence or absence of a power supply voltage when a ring signal is input from the outside, and automatically forms a telephone loop when the power supply voltage is applied, and performs a ring signal presence or absence on a password. Otherwise, only the ring signal is sent. The function of such an answering machine is called a selective call function.

제1도는 종래에 사용되어 온 선별통화회로를 보여준다. 제1도의 회로에서 전원전압(Vcc)이 인가되는 동안에 선별통화기능을 수행할 때에는, 링거회로(20)를 통하여 발생되는 링신호를 포토커플러(IC1)가 감지하여 이를 중앙처리장치(30)로 전송하고, 중앙처리장치(30)는 포토커플러(IC1)로부터 받은 데이타를 이용하여 증폭기(OP)로 링신호를 전송하고 이 링신호는 증폭기(OP)에서 증폭된 다음 스피커(SP2)를 통하여 재생된다. 이때, 스피커(SP1)는, 포토커플러(IC2)가 전원전압(Vcc)을 공급받고 있으면 npn바이폴라트랜지스터(Q1)를 턴오프시키기 때문에 동작하지 않는다.1 shows a selective call circuit which has been conventionally used. When performing the selective call function while the power supply voltage Vcc is applied in the circuit of FIG. 1, the photocoupler IC1 detects a ring signal generated through the ringer circuit 20 and transmits the ring signal to the central processing unit 30. The central processing unit 30 transmits a ring signal to the amplifier OP using data received from the photocoupler IC1, which is amplified by the amplifier OP and then reproduced through the speaker SP2. do. At this time, the speaker SP1 does not operate because the npn bipolar transistor Q1 is turned off when the photocoupler IC2 is supplied with the power supply voltage Vcc.

한편, 전원전압(Vcc)이 공급되고 있지 않은 경우에는, 포토커플러(IC1)는 링신호 감지동작을 수행하지 못한다. 이때에는 브리지정류회로(10)의 양극출력단자(+)의 전위가 상승함에 따라 npn바이폴라트랜지스터(Q1)가 턴온되므로, 링거회로(20)로부터 발생되는 링신호는 npn바이폴라트랜지스터(Q1)를 통하여 스피커(SP1)로 전달된다. 스피커(SP1)에서는 전기신호가 음신호로 변환된다.On the other hand, when the power supply voltage Vcc is not being supplied, the photocoupler IC1 cannot perform the ring signal sensing operation. At this time, since the npn bipolar transistor Q1 is turned on as the potential of the positive output terminal (+) of the bridge rectifier circuit 10 rises, the ring signal generated from the ringer circuit 20 is transferred through the npn bipolar transistor Q1. It is delivered to the speaker SP1. In the speaker SP1, the electric signal is converted into a sound signal.

제2도와 같은 종래 회로에 있어서는, 선별통화기능을 위하여 두개의 스피커를 사용하여야 하기 때문에 회로구성상의 제약조건이 따르고 또한 제조원가가 높은 단점이 있다. 또한, 제1도의 회로에서는 스피커(SP1)는 음압차가 크다는 문제점이 있다.In the conventional circuit as shown in FIG. 2, since two speakers must be used for the selective call function, there are disadvantages in that the circuit configuration is constrained and the manufacturing cost is high. In addition, in the circuit of FIG. 1, the speaker SP1 has a problem that the sound pressure difference is large.

따라서, 본 발명의 목적은 회로구성이 간단하고 제조원가가 낮은 선별통화회로를 제공함에 있다.Accordingly, an object of the present invention is to provide a selective talk circuit having a simple circuit configuration and a low manufacturing cost.

이하 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세하게 설명한다. 본 발명에 따른 선별통화회로는 자동응답기능을 가진 유선전화기 또는 무선전화기에 공용으로 적용가능하다는 것을 이해하여야 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the selective call circuit according to the present invention is commonly applicable to wired telephones or wireless telephones having an automatic answering function.

제2도를 참조하면, 본 발명에 따른 선별통화회로는 국선링이 착신될때 링신호를 발생하는 링거회로(40)와, 상기 링거회로(40)와 스피커간에 접속하는 변압기(TR)와, 전원전압(Vcc)이 공급될때 변압기(TR)의 전류공급경로를 오픈하여 변압기(TR)를 부유(Floating)상태로 만드는 변압기 제어부(60)와, 전원전압(Vcc)이 공급되는 상태에서 상기 링거회로(40)로부터 링신호가 발생될때 링감지신호를 발생하는 링신호 감지부(50)와, 상기 링감지신호의 발생에 따라 링음을 출력하는 중앙처리장치(30)와, 상기 중앙처리장치(30)로부터 출력되는 링신호를 증폭하여 스피커(SP10)로 제공하는 증폭기(OP)로 구성된다.Referring to FIG. 2, the selective calling circuit according to the present invention includes a ringer circuit 40 for generating a ring signal when a trunk line ring is received, a transformer TR connected between the ringer circuit 40 and a speaker, and a power supply. The transformer control unit 60 which opens the current supply path of the transformer TR when the voltage Vcc is supplied to make the transformer TR floating, and the ringer circuit in the state where the power voltage Vcc is supplied. Ring signal detection unit 50 for generating a ring detection signal when a ring signal is generated from the 40, a central processing unit 30 for outputting a ring sound in accordance with the generation of the ring detection signal, and the central processing unit 30 It is composed of an amplifier (OP) for amplifying the ring signal output from the) to provide to the speaker (SP10).

상기 링신호 감지부(50)는 링거회로(40)의 정상출력단과 제1단자(1)가 연결되고 링거회로(40)의 역상출력단과 저항(R12)을 통하여 제2단자(2)가 연결되고 전원전압(Vcc)과 저항(R11)을 통하여 제4단자(4)가 연결되고 제3단자(3)는 접지되는 제1포토커플러(IC11)와, 링거회로(40)의 역상출력단과 제1포토커플러(IC11)의 제2단자(2) 사이에 연결되는 저항(R12)과, 전원전압(Vcc)과 제1포토커플러(IC11)의 제4단자(4)에 연결되는 저항(R11)으로 구성된다.The ring signal detector 50 is connected to the normal output terminal of the ringer circuit 40 and the first terminal 1, and the second terminal 2 is connected to the reverse phase output terminal of the ringer circuit 40 and the resistor R12. And a fourth photocoupler IC11 connected to the fourth terminal 4 through a power supply voltage Vcc and a resistor R11, and the third terminal 3 is grounded, and the reverse phase output terminal of the ringer circuit 40 and the first terminal. A resistor R12 connected between the second terminal 2 of the first photocoupler IC11 and a resistor R11 connected to the fourth terminal 4 of the power supply voltage Vcc and the first photocoupler IC11. It consists of.

상기 중앙처리장치(30)는 제1포토커플러(IC11)의 제4단자(4)로부터 출력되는 신호를 입력받는다.The CPU 30 receives a signal output from the fourth terminal 4 of the first photocoupler IC11.

여기서, 상기 링신호 감지부(50)의 제1포토커플러(IC11)는 링신호가 링거회로(40)로부터 발생되었을 때, 제1단자(1)로부터 제2단자(2)로 전류가 흐르고 이것에 의해 제4단자(4)로부터 제3단자(3)로의 전류경로가 형성된다. 이에 따라 중앙처리장치(30)로 논리 로우상태신호가 입력된다. 상기 논리 로우상태신호를 링감지신호라 하며, 중앙처리장치(30)는 링감지신호가 입력되면 링음을 발생한다. 상기 중앙처리장치(30)로부터 출력되는 링음을 증폭하여 스피커(SP10)에 제공한다.Here, when the ring signal is generated from the ringer circuit 40, the first photocoupler IC11 of the ring signal detector 50 flows current from the first terminal 1 to the second terminal 2. As a result, a current path from the fourth terminal 4 to the third terminal 3 is formed. Accordingly, the logic low state signal is input to the CPU 30. The logic low state signal is referred to as a ring sensing signal, and the central processing unit 30 generates a ring sound when the ring sensing signal is input. The ring sound output from the CPU 30 is amplified and provided to the speaker SP10.

상기 변압기(TR)의 1차측 권선의 일측단자는 콘덴서(C11)를 통하여 링거회로(40)의 정상출력단과 연결되고 타측단자는 변압기 제어부(60)와 연결된다. 그리고, 변압기(TR)의 2차측 권선의 일측단자는 스피커(SP10)와 연결되고 타측단자는 접지된다.One terminal of the primary winding of the transformer TR is connected to the normal output terminal of the ringer circuit 40 through the capacitor C11 and the other terminal is connected to the transformer controller 60. One terminal of the secondary winding of the transformer TR is connected to the speaker SP10 and the other terminal is grounded.

상기 변압기 제어부(TR)는 콜렉터는 변압기(TR)의 1차측 권선의 타측단자와 연결되고, 베이스는 저항(R13,R14)을 통하여 링거회로(40)의 DC전압단과 연결되고, 에미터는 링거회로(40)의 역상출력단과 연결되는 npn바이폴라트랜지스터(Q10)와, 일측은 링거회로(40)의 DC전압단과 연결되고 타측은 저항(R14)의 일측과 연결되는 저항(R13)과, 일측은 저항(R13)의 타측과 연결되고 일측은 트랜지스터(Q10)의 베이스와 연결되는 저항(R14)과, 제1단자(1)는 저항(R15)을 통하여 전원전압(Vcc)과 연결되고, 제2단자(2)는 접지되며, 제3단자(3)는 링거회로(40)의 역상출력단과 연결되며, 제4단자(4)는 저항(R13)과 저항(R14) 사이에 연결되는 제2포토커플러(IC12)로 구성된다.The transformer control unit TR is connected to the other terminal of the primary winding of the transformer TR, the base is connected to the DC voltage terminal of the ringer circuit 40 through the resistors R13 and R14, and the emitter is a ringer circuit. Npn bipolar transistor (Q10) connected to the reverse phase output terminal of (40), one side is connected to the DC voltage terminal of the ringer circuit 40, the other side is connected to one side of the resistor (R14), and one side is a resistor A resistor R14 connected to the other side of R13 and one side connected to the base of the transistor Q10, and the first terminal 1 are connected to the power supply voltage Vcc through the resistor R15, and the second terminal (2) is grounded, the third terminal (3) is connected to the reverse phase output terminal of the ringer circuit 40, the fourth terminal (4) is a second photocoupler connected between the resistor (R13) and the resistor (R14) It consists of (IC12).

여기서, 변압기(TR)의 1차측 권선의 전류공급경로는 링거회로(40)의 정상출력단, 콘덴서(C11), 변압기(TR)의 1차측 권선, npn바이폴라트랜지스터(Q10), 링거회로(40)의 역상출력단으로 이루어진다.Here, the current supply path of the primary winding of the transformer TR, the normal output stage of the ringer circuit 40, the capacitor C11, the primary winding of the transformer TR, npn bipolar transistor Q10, the ringer circuit 40 It consists of reverse phase output stage of.

상기와 같은 상태에서 변압기 제어부(60)의 제2포토커플러(IC12)는 전원전압(Vcc)이 공급될 때, 제1단자(1)로 부터 제2단자(2)로 전류가 흐르고 제4단자(4)로부터 제3단자(3)로의 전류경로가 형성된다. 이에 따라 링거회로(40)의 DC전압단으로부터 출력되는 전류가 npn바이폴라트랜지스터(Q10)의 베이스로 흐르지 않고 제2포토커플러(IC12)의 제4단자(4)와 제3단자(3)를 통하여 흐르게 된다. 따라서 npn바이폴라트랜지스터(Q1)가 턴오프된다. 이에 따라 변압기(TR)의 전류공급경로가 오픈되어 변압기(TR)가 부유상태(Float)가 된다.In the above state, when the power supply voltage Vcc is supplied to the second photocoupler IC12 of the transformer control unit 60, current flows from the first terminal 1 to the second terminal 2 and the fourth terminal. The current path from (4) to the third terminal 3 is formed. Accordingly, the current output from the DC voltage terminal of the ringer circuit 40 does not flow to the base of the npn bipolar transistor Q10, but through the fourth terminal 4 and the third terminal 3 of the second photocoupler IC12. Will flow. Therefore, the npn bipolar transistor Q1 is turned off. As a result, the current supply path of the transformer TR is opened so that the transformer TR becomes floating.

그리고, 제2포토커플러(IC12)에 전원전압(Vcc)이 공급되지 않을 때에는 제4단자(4)로부터 제3단자(3)로의 전류경로가 형성되지 않는다. 이에 따라 npn바이폴라트랜지스터(Q10)의 베이스에 링거회로(40)의 DC전압단으로부터 출력되는 전류가 입력되므로 npn바이폴라트랜지스터(Q10)가 도통된다. 상기 npn바이폴라트랜지스터(Q10)가 도통됨에 따라 변압기(TR)의 전류공급경로가 연결된다.When the power supply voltage Vcc is not supplied to the second photocoupler IC12, the current path from the fourth terminal 4 to the third terminal 3 is not formed. Accordingly, since the current output from the DC voltage terminal of the ringer circuit 40 is input to the base of the npn bipolar transistor Q10, the npn bipolar transistor Q10 is conducted. As the npn bipolar transistor Q10 is conducted, a current supply path of the transformer TR is connected.

상기 스피커(SP10)는 증폭기(OP)로부터 출력되는 링음, 또는 변압기(TR)를 통하여 링거회로(40)로부터 출력되는 링신호를 입력받아 링을 발생한다.The speaker SP10 generates a ring by receiving a ring sound output from the amplifier OP or a ring signal output from the ringer circuit 40 through the transformer TR.

그러면, 제2도에 따른 선별통화동작을 설명한다.Next, the selective call operation according to FIG. 2 will be described.

먼저, 외부로부터 전원전압(Vcc)이 인가되지 않은 상태에서는, 링거회로(40)의 DC전압단에 의해 트랜지스터(Q1)는 턴온되고 제1 및 제2포토커플러(IC11 및 IC12)가 턴오프되므로, 링거회로(40)로부터의 링신호는 변압기(TR)를 통하여 스피커(SP10)로 전달된다.First, in a state where the power supply voltage Vcc is not applied from the outside, the transistor Q1 is turned on by the DC voltage terminal of the ringer circuit 40 and the first and second photocouplers IC11 and IC12 are turned off. The ring signal from the ringer circuit 40 is transmitted to the speaker SP10 through the transformer TR.

외부로부터 전원전압(Vcc)이 인가된 상태에서는, 링거회로(40)로부터의 링신호를 제1포토커플러(IC11)가 감지하여 논리 로우상태의 링감지신호가 제1포토커플러(IC11)로부터 중앙처리장치(30)로 전송되고, 증폭기(OP)에 의해 증폭된 링음이 스피커(SP10)를 통하여 발생된다. 이때, 제2포토커플러(IC12)의 구동에 의해 트랜지스터(Q1)가 턴오프되기 때문에, 변압기(TR)를 통해 링신호는 흐르지 않게 되며, 스피커(SP10)의 측에서 본 변압기(TR)의 임피던스는 일정하게 된다. 결국 국선 팁단자와 링단자에서 인가된 신호는 절단되고 단지 제1포토커플러(IC11)에 의해 국선링 착신만 감지하여 중앙처리장치(30)에서 링신호를 발생시켜 증폭기(OP)를 통해 스피커(SP10)로 송출한다. 가령, 링거회로(40)이 정상출력단과 캐패시터(C11) 사이에 스피커 음량 제어용의 스위치를 삽입한다 하더라도, 증폭기(OP)의 출력은 그것에 의해 영향을 받지 않는다.In the state where the power supply voltage Vcc is applied from the outside, the first photocoupler IC11 detects the ring signal from the ringer circuit 40 so that the ring detection signal in the logic low state is centered from the first photocoupler IC11. The ring sound transmitted to the processing apparatus 30 and amplified by the amplifier OP is generated through the speaker SP10. At this time, since the transistor Q1 is turned off by the driving of the second photocoupler IC12, the ring signal does not flow through the transformer TR, and the impedance of the transformer TR as viewed from the speaker SP10 side. Becomes constant. As a result, the signals applied from the trunk line tip terminal and the ring terminal are cut off, and only the incoming ring ring is detected by the first photocoupler IC11 to generate a ring signal in the central processing unit 30 to generate a ring signal through the amplifier OP. SP10). For example, even if the ringer circuit 40 inserts a switch for speaker volume control between the normal output stage and the capacitor C11, the output of the amplifier OP is not affected by it.

상술한 바와 같이, 본 발명은 자동응답전화기에 있어서 종래에 비해 보다 간단한 회로구성으로 선별통화기능을 수행할 수 있기 때문에, 제조원가를 줄이고 제작이 용이한 선별통화회로를 제공하는 효과가 있다.As described above, since the present invention can perform the selective call function with a simpler circuit configuration than the conventional answering machine, there is an effect of reducing the manufacturing cost and providing a selective call circuit that is easy to manufacture.

Claims (1)

전원의 인가유무를 따라 선별적인 통화기능을 수행하는 자동응답전화기에 있어서, 국선링이 착신될 때 링신호를 발생하는 링거회로와, 스피커와, 상기 링거회로와 상기 스피커간에 접속되는 변압기와, 전원전압이 공급될때 상기 변압기를 부유상태로 만드는 변압기 제어부와, 상기 전원전압이 공급되는 상태에서 상기 링거회로로부터 링신호가 발생될때 링감지신호를 발생하는 링신호감지부와, 상기 링감지신호의 발생에 따라 링음을 출력하는 중앙처리장치와, 상기 중앙처리장치로부터 출력되는 상기 링음을 증폭하여 상기 스피커에 제공하는 증폭기를 구비하는 것을 특징으로 하는 자동응답전화기의 선별통화회로.An answering machine that performs a selective call function according to whether power is applied, A ringer circuit for generating a ring signal when a trunk line ring is received, a speaker, a transformer connected between the ringer circuit and the speaker, and a power supply A transformer control unit which makes the transformer in a floating state when a voltage is supplied, a ring signal detecting unit generating a ring detection signal when a ring signal is generated from the ringer circuit while the power supply voltage is supplied, and generation of the ring detection signal And a amplifier for amplifying the ring sound output from the central processor and providing the speaker to the speaker.
KR1019930028360A 1993-12-18 1993-12-18 Selecting circuit for a.r.s. KR970003983B1 (en)

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KR1019930028360A KR970003983B1 (en) 1993-12-18 1993-12-18 Selecting circuit for a.r.s.

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KR950022580A KR950022580A (en) 1995-07-28
KR970003983B1 true KR970003983B1 (en) 1997-03-24

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