KR100442606B1 - Interface circuit for recording a speech voice in a telephone terminal, particularly concerned with recording speech contents or a transceiving response message by using an external recording device in the telephone terminal - Google Patents

Interface circuit for recording a speech voice in a telephone terminal, particularly concerned with recording speech contents or a transceiving response message by using an external recording device in the telephone terminal Download PDF

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KR100442606B1
KR100442606B1 KR1019970034144A KR19970034144A KR100442606B1 KR 100442606 B1 KR100442606 B1 KR 100442606B1 KR 1019970034144 A KR1019970034144 A KR 1019970034144A KR 19970034144 A KR19970034144 A KR 19970034144A KR 100442606 B1 KR100442606 B1 KR 100442606B1
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South Korea
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recording
telephone terminal
voice
interface circuit
voice signal
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KR1019970034144A
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Korean (ko)
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KR19990011164A (en
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이형곤
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삼성전자주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H04N1/32704—Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
    • H04N1/32706—Type of the other apparatus
    • H04N1/3271—Telephone answering machine
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0274—Details of the structure or mounting of specific components for an electrical connector module
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/6505—Recording arrangements for recording a message from the calling party storing speech in digital form

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Telephone Function (AREA)

Abstract

PURPOSE: An interface circuit for recording a speech voice in a telephone terminal is provided to output a speech voice signal transmitted or received through a communication line to a recording jack, and to connect a recorder with the recording jack without using a transformer when matching impedance, thereby reducing a mounting space. CONSTITUTION: A differential amplifier(10) differentially amplifies a transmitting voice signal and a receiving voice signal to mix the amplified voice signals, and outputs the mixed voice signals. An inverting amplifier(12) inversely amplifies the mixed voice signals, and outputs the inversely amplified voice signals. A level controller(14) controls levels of the inversely amplified voice signals, and outputs the level controlled voice signals.

Description

전화단말기에서 통화음성 녹음 인터페이스회로Call voice recording interface circuit in telephone terminal

본 발명은 팩시밀리장치에서 오디오 녹음 인터페이스회로에 관한 것으로, 특히 전화단말기에서 송수신시 발생되는 통화음성신호를 외부의 녹음기를 연결하여 녹음할 수 있도록 인터페이싱하는 통화음성 녹음 인터페이스회로에 관한 것이다.The present invention relates to an audio recording interface circuit in a facsimile apparatus, and more particularly, to a call voice recording interface circuit for interfacing a voice call signal generated during transmission and reception at a telephone terminal by connecting an external recorder.

통상적으로 자동응답 기능을 갖고 있는 전화단말기는 부재중에 전화가 걸려오는 경우 자동응답장치에 저장되어 있는 안내메세지를 송출한 후 상대방이 남기는 용건메세지를 디지탈 데이터로 변환하여 반도체 메모리에 저장한다. 그런후 사용자가 외출에서 돌아와 자동응답장치를 구동시켜 녹음되어 있는 상대방이 남긴 메세지를 재생하여 듣게된다. 그런데 이러한 자동응답장치에 장착된 반도체 메모리는 휘발성 메모리이므로 다수의 메세지가 저장되는 경우에 맨 먼저 저장된 용건메세지가 확인하기전에 지워져 사용자는 용건메세지를 확인할 수 없었다. 또한 전화단말기의 사용자가 어떤 범죄등이나 법정에 연루되어 전화통화내용을 증거물로 제시하여야 상황에서 녹음하여야 하는 경우 종래의 전화단말기는 별도의 녹음장치를 구입하여 장착한 후 외부에 녹음기를 설치하여 녹음하게 되므로 비용이 상승되는 문제가 있었다. 이러한 문제를 해결하기 위해 전화단말기에 통화내용을 녹음할 수 있는 인터페이스회로가 요구되었으며, 음성통화를 녹음할 수 있도록 녹음기를 외부에 연결하기 위한 종래의 통화음성 녹음 인터페이스회로가 도 1에 개시되어 있다. 도 1에서 송회회로로부터 음성신호가 캐패시터 C1 및 저항 R1을 통해 차동증폭기 U1A의 반전단에 인가되며, 수화회로로부터 출력되는음성신호는 캐패시터 C2 및 저항 R2를 통해 차동증폭기 U1A의 비반전단으로 인가된다. 이때 차동증폭기 U1A는 상기 송화음성신호와 수화음성신호를 차동증폭하여 믹싱출력한다. 상기 차동증폭기 U1A로부터 믹싱된 음성신호는 캐패시터 C4를 통해 커플링된 후 트랜스포머 T1으로 인가되어 임피던스매칭을 시켜 녹음잭 J1으로 인가된다. 이때 외부 녹음기를 녹음잭에 꼽아 통화음성신호를 녹음한다.In general, a telephone terminal having an automatic answering function transmits a guide message stored in an automatic answering device when a telephone call is missed, and converts the message left by the other party into digital data and stores it in the semiconductor memory. Then, when the user returns from the outside, the answering machine is driven to play and listen to the message left by the recorded party. However, since the semiconductor memory installed in the automatic answering device is a volatile memory, when a plurality of messages are stored, the stored message is first erased before checking, and the user cannot confirm the message. In addition, if the user of the telephone terminal is to be involved in any crime or court, and the contents of the telephone call must be presented as evidence, the conventional telephone terminal needs to purchase a separate recording device and install it. There was a problem that the cost will rise. In order to solve this problem, an interface circuit capable of recording a call content is required in a telephone terminal, and a conventional voice call recording interface circuit for connecting a recorder to the outside to record a voice call is disclosed in FIG. 1. . In Fig. 1, the voice signal from the circuit is applied to the inverting terminal of the differential amplifier U1A through the capacitor C1 and the resistor R1, and the voice signal output from the receiving circuit is applied to the non-inverting terminal of the differential amplifier U1A through the capacitor C2 and the resistor R2. . At this time, the differential amplifier U1A differentially amplifies the mixed voice signal and the received voice signal and outputs the mixed output signal. The voice signal mixed from the differential amplifier U1A is coupled through the capacitor C4 and then applied to the transformer T1 to perform impedance matching to the recording jack J1. At this time, plug an external recorder into the recording jack to record the voice call signal.

그런데 상기와 같은 종래의 통화음성 녹음 인터페이스회로는 트랜스포머 T1을 사용하므로 부피가 크게되어 실장공간을 많이 차지하는 문제점이 있었다.However, the conventional voice recording interface circuit as described above has a problem in that it takes up a lot of mounting space because the volume is large because the transformer T1 is used.

따라서 본 발명의 목적은 상기와 같은 문제점을 해결하기 위해 실장공간을 작게차지할 수 있도록 트랜스포머를 사용하지 않는 통화음성 녹음 인터페이스회로를 제공함에 있다.Accordingly, an object of the present invention is to provide a call voice recording interface circuit that does not use a transformer so as to minimize the mounting space in order to solve the above problems.

상기 목적을 달성하기 위한 본 발명은, 전화단말장치에서 통화내용을 녹음할 수 있도록 녹음잭으로 출력하는 인터페이스회로에 있어서, 송화음성신호와 수화음성신호를 차동증폭하여 믹싱출력하는 차동증폭기와, 상기 차동증폭기로부터 믹싱된 음성신호를 반전 증폭 출력하는 반전증폭기와, 상기 반전증폭기로부터 반전 증폭된 음성신호의 레벨을 조절하여 출력하는 레벨조절부로 구성함을 특징으로 한다.According to an aspect of the present invention, there is provided an interface circuit for outputting a call to a recording jack in a telephone terminal device, comprising: a differential amplifier for differentially amplifying a mixed voice signal and a spoken voice signal and outputting the mixed signal; And an inverting amplifier for inverting and amplifying and outputting the mixed audio signal from the differential amplifier, and a level adjusting unit for adjusting and outputting the level of the inverted and amplified voice signal from the inverting amplifier.

도 1은 종래 전화단말장치의 통화음성 녹음 인터페이스회로도1 is a voice call recording interface circuit of a conventional telephone terminal device

도 2는 본 발명의 실시예에 적용되는 전화단말장치의 통화음성 녹음 인터페이스회로도Figure 2 is a voice call recording interface circuit of the telephone terminal device applied to the embodiment of the present invention

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

도 1은 본 발명의 실시예에 적용되는 전화단말장치의 통화음성 녹음 인터페이스회로도이다.1 is a circuit diagram of an audio recording interface of a telephone terminal device applied to an embodiment of the present invention.

차동증폭회로 10은 송화회로에 캐패시터 C1 및 저항 R1이 연결되어 차동증폭기 U1A의 반전단에 접속되고, 수화회로에 캐패시터 C2 및 저항 R2가 연결되어 차동증폭기 U1A의 비반전단에 접속되며, 상기 차동증폭기 U1A의 비반전과 접지사에 저항 R4 및 캐패시터 C3가 직렬접속 되고, 상기 캐패시터 C3에 저항 R6이 병렬 접속되며, 전원단에 저항 R5가 접속되어 저항 R6에 접속되고, 상기 차동증폭기 U1A의 반전단과 출력단 사이에 저항 R3가 병렬접속된 구성을 가진다. 송회회로로부터 음성신호가 캐패시터 C1 및 저항 R1을 통해 차동증폭기 U1A의 반전단에 인가되며, 수화회로로부터 출력되는음성신호는 캐패시터 C2 및 저항 R2를 통해 차동증폭기 U1A의 비반전단으로 인가된다. 이때 차동증폭기 U1A는 상기 송화음성신호와 수화음성신호를 차동증폭하여 믹싱출력한다. 그리고 상기 저항 R5 및 R6과 캐패시터 C3는 차동증폭기 U1A를 동작시키기위한 기준전압을 생성한다. 반전증폭부 12는 상기 차동증폭기 U1A의 출력단에 저항 R7이 연결되어 반전증폭기 U1B의 반전단에 접속되고, 상기 반전증폭기 U1B의 반전단과 출력단 사이에 저항 R8이 접속되며, 상기 반전증폭기 U1B의 비반전단이 상기 저항 R4 및 캐패시터 C3의 접속노드에 연결되는 구성을 가진다. 따라서 상기 차동증폭기 U1A로부터 믹싱된 음성신호는 저항 R7을 통해 반전증폭기 U1B의 반전단으로 인가되어 상기 반전증폭기 U1B에서 반전 증폭된다. 그리고 레벨조절부 14는 상기 차동증폭기 U1A의 출력단에 캐패시터 C4 및 저항 R9가 직렬연결되어 녹음잭 J1의 한단자에 접속되고, 상기 반전증폭기 U1B의 출력단에 캐패시터 C5 및 저항 R10이가 직렬연결되어 녹음잭 J1의 다른 단자에 접속되는 구성을 가진다.따라서 상기 반전증폭기 U1B로부터 반전 증폭된 음성신호는 캐패시터 C4 및 C5를 통해 커플링되어 DC가 차단되며, 저항 R9 및 R10을 통해 음성신호의 레벨이 조절되는 동시에 600ohm의 임피던스를 갖도록 한다. 이때 외부에서 녹음기에 연결된 플러그를 녹음잭 J1에 꼽은후 녹음기의 기록키를 누르면 통화음성신호가 녹음된다. 상기 녹음잭 J1은 전화단말기의 하우징에 설치되어 예를들어 녹음기 등을 접속할 수 있도록 설치되어 있다.The differential amplifier circuit 10 is connected to the inverting terminal of the differential amplifier U1A by the capacitor C1 and the resistor R1 connected to the transmitter circuit, and the capacitor C2 and the resistor R2 are connected to the non-inverting terminal of the differential amplifier U1A by the receiver circuit. A resistor R4 and a capacitor C3 are connected in series to the non-inverting and ground yarns of U1A, a resistor R6 is connected in parallel to the capacitor C3, a resistor R5 is connected to a power supply terminal and connected to a resistor R6, and the inverting terminal of the differential amplifier U1A The resistor R3 is connected in parallel between the output terminals. The voice signal from the transmitting circuit is applied to the inverting end of the differential amplifier U1A through the capacitor C1 and the resistor R1, and the voice signal output from the receiving circuit is applied to the non-inverting end of the differential amplifier U1A through the capacitor C2 and the resistor R2. At this time, the differential amplifier U1A differentially amplifies the mixed voice signal and the received voice signal and outputs the mixed output signal. The resistors R5 and R6 and the capacitor C3 generate a reference voltage for operating the differential amplifier U1A. Inverting amplifier 12 is connected to the output terminal of the differential amplifier U1A resistor R7 is connected to the inverting terminal of the inverting amplifier U1B, the resistor R8 is connected between the inverting terminal and the output terminal of the inverting amplifier U1B, the non-inverting terminal of the inverting amplifier U1B It has a configuration connected to the connection node of the resistor R4 and the capacitor C3. Therefore, the voice signal mixed from the differential amplifier U1A is applied to the inverting terminal of the inverting amplifier U1B through the resistor R7 and inverted and amplified in the inverting amplifier U1B. In addition, the level control unit 14 is connected to the output terminal of the differential amplifier U1A capacitor C4 and the resistor R9 in series connected to one terminal of the recording jack J1, the capacitor C5 and the resistor R10 is connected in series to the output terminal of the inverting amplifier U1B recording jack Therefore, the voice signal inverted and amplified from the inverting amplifier U1B is coupled through the capacitors C4 and C5 to block DC, and the level of the voice signal is adjusted through the resistors R9 and R10. At the same time, have an impedance of 600 ohms. At this time, if the plug connected to the external recorder is plugged into the recording jack J1 and the record key of the recorder is pressed, the call voice signal is recorded. The recording jack J1 is installed in the housing of the telephone terminal so as to connect a recorder or the like, for example.

상술한 바와같이 본 발명은, 통신선로를 통해 송신 또는 수신되는 통화 음성신호를 녹음잭으로 출력하도록 하고, 녹음잭에 녹음기를 연결하여 녹음하도록 하는 인터페이스회로에서 임피던스를 매칭시키기 위해 트랜스포머를 사용하지 않으므로, 실장공간을 줄일수 있는 이점이 있다.As described above, the present invention does not use a transformer to match impedance in an interface circuit for outputting a voice signal transmitted or received through a communication line to a recording jack and connecting a recorder to the recording jack for recording. This has the advantage of reducing the mounting space.

Claims (4)

전화단말장치에서 통화내용을 녹음할 수 있도록 녹음잭으로 출력하는 인터페이스회로에 있어서,In the interface circuit outputting to the recording jack so that the telephone terminal device to record the call, 송화음성신호와 수화음성신호를 차동증폭하여 믹싱출력하는 차동증폭기와,A differential amplifier for differentially amplifying the mixed voice signal and the received voice signal and outputting the mixed sound; 상기 차동증폭기로부터 믹싱된 음성신호를 반전 증폭 출력하는 반전증폭기와,An inverting amplifier for inverting and amplifying and outputting the mixed voice signal from the differential amplifier; 상기 반전증폭기로부터 반전 증폭된 음성신호의 레벨을 조절하여 출력하는 레벨조절부로 구성함을 특징으로 하는 전화단말기에서 통화음성 녹음 인터페이스회로.And a level control unit configured to adjust and output a level of the voice signal inverted and amplified from the inverting amplifier. 제1항에 있어서, 상기 레벨조절부는,The method of claim 1, wherein the level control unit, 상기 차동증폭기의 출력단에 캐패시터 C4 및 저항 R9가 직렬연결되어 녹음잭 J1의 한단자에 접속되고, 상기 반전증폭기 U1B의 출력단에 캐패시터 C5 및 저항 R10이가 직렬연결되어 녹음잭 J1의 다른 단자에 접속되는 구성을 가지는 것을 특징으로 하는 전화단말기에서 통화음성 녹음 인터페이스회로.Capacitor C4 and resistor R9 are connected in series at the output terminal of the differential amplifier and connected to one terminal of recording jack J1, and capacitor C5 and resistor R10 are connected in series at the output terminal of the inverting amplifier U1B and connected to the other terminal of recording jack J1. Call voice recording interface circuit in the telephone terminal, characterized in that the configuration. 제2항에 있어서,The method of claim 2, 상기 저항 R9 및 R10은, 600ohm의 임피던스를 갖도록 하는 것을 특징으로 하는 전화단말기에서 통화음성 녹음 인터페이스회로.And the resistors R9 and R10 have an impedance of 600 ohms. 제3항에 있어서,The method of claim 3, 상기 캐패시터 C4 및 C5는, 음성신호의 DC를 차단함을 특징으로 하는 전화단말기에서 통화음성 녹음 인터페이스회로.The capacitors C4 and C5, the voice call recording interface circuit in the telephone terminal, characterized in that to cut off the DC of the voice signal.
KR1019970034144A 1997-07-22 1997-07-22 Interface circuit for recording a speech voice in a telephone terminal, particularly concerned with recording speech contents or a transceiving response message by using an external recording device in the telephone terminal KR100442606B1 (en)

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KR1019970034144A KR100442606B1 (en) 1997-07-22 1997-07-22 Interface circuit for recording a speech voice in a telephone terminal, particularly concerned with recording speech contents or a transceiving response message by using an external recording device in the telephone terminal

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