KR930007135A - Hand-Free Circuit and Control Method for Bidirectional Communication of Automobile Telephones - Google Patents

Hand-Free Circuit and Control Method for Bidirectional Communication of Automobile Telephones Download PDF

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Publication number
KR930007135A
KR930007135A KR1019910016627A KR910016627A KR930007135A KR 930007135 A KR930007135 A KR 930007135A KR 1019910016627 A KR1019910016627 A KR 1019910016627A KR 910016627 A KR910016627 A KR 910016627A KR 930007135 A KR930007135 A KR 930007135A
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South Korea
Prior art keywords
receiver
microphone
amplifying means
capacitor
cpu
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KR1019910016627A
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Korean (ko)
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KR940004459B1 (en
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조형식
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정몽헌
현대전자선업 주식회사
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Priority to KR1019910016627A priority Critical patent/KR940004459B1/en
Publication of KR930007135A publication Critical patent/KR930007135A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Telephone Function (AREA)

Abstract

본 발명은 자동차 전화기의 쌍방향 통신 방식의 핸드프리 회로 및 제어 방법에 관한 것으로, 헤드세트를 사용하여 쌍방향 통신이 가능하도록 하고 하울링의 발생을 억제하기 위한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hands-free circuit and a control method of a two-way communication method of an automobile telephone, and to enable two-way communication using a headset and to suppress occurrence of howling.

따라서, 본 발명은 마이크(16)와 리시버(17)가 일체로 구성된 헤드세트(15), 마이크 증폭수단(13), 리시버 증폭수단(14), CPU(Central Procesing Unit)(11), 핸드세트(12), 및 송수신 수단(10)으로 구성되고, 상기와 같이 구성된 장치를 이용하여 수신모드에서 오프-훅크(OFF-HOOK) 상태이면 오디오 경로를 상기 핸드세트(12)로 하여 통화모드로 들어가는 제1단계(100, 110, 140), 상기 수신 모드에서 온-훅크(ON-HOOK) 상태이면 송신키의 DTMF(Dual Tone Multi-Frequency)톤이 발생될 때까지 훅크의 상태를 검색하는 제2단계(110, 120), 및 상기 온-훅크인 상태에서 상기 송신키의 DTMF톤이 발생하면 오디오 경로를 상기 헤드세트(15)로 하여 통화모드로 들어가는 제3단계(130)에 의해 수행하는 것을 특징으로 한다.Accordingly, the present invention provides a headset 15 in which the microphone 16 and the receiver 17 are integrated, a microphone amplifying means 13, a receiver amplifying means 14, a central processing unit (CPU) 11, a handset. (12) and the transmission / reception means (10), and when the device is configured as described above in the off-hook (OFF-HOOK) state, the audio path is entered into the call mode with the handset 12. First step (100, 110, 140), if the on-hook (ON-HOOK) state in the receiving mode (second) for searching the state of the hook until a Dual Tone Multi-Frequency (DTMF) tone of the transmit key is generated Steps 110 and 120, and when the DTMF tone of the transmission key is generated in the on-hook state, performing the third step 130 to enter a call mode using the audio path as the headset 15. It features.

Description

자동차전화기의 쌍방향 통신을 위한 핸드프리 회로 및 제어방법Hand-Free Circuit and Control Method for Bidirectional Communication of Automobile Telephones

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 의한 쌍방향 통신 방식의 핸드 프리 회로의 구성도,2 is a block diagram of a hand-free circuit of the bidirectional communication method according to the present invention,

제3도는 본 발명에 의한 쌍방향 통신 방식의 핸드 프리 제어 방법의 흐름도.3 is a flowchart of a hand-free control method of a bidirectional communication method according to the present invention.

Claims (4)

쌍방향 통신을 위한 자동차 전화기의 핸드프리 회로에 있어서, 마이크(16)와 리시버(17)가 일체로 구성된 헤드세트(15) , 상기 마이크(16)에 연결되어 상기 마이크(16)를 통해 입력되는 신호를 증폭하는 마이크 증폭수단(13), 상기 리시버(17)에 연결되어 상기 리시버(17)로 입력되는 신호를 증폭하는 리시버 증폭수단(14), 상기 마이크 증폭수단(13)과 리시버 증폭수단(14)에 연결된 CPU(Central Procesing Unit)(11), 상기 CPU(11)에 연결된 핸드세트(12) , 및 상기 CPU(11)에 연결되어 송수신을 위한 신호를 처리하는 송수신 수단(10)으로 구성되는 것을 특징으로 하는 핸드 프리 회로.In the hand-free circuit of an automobile telephone for two-way communication, a headset 15 having a microphone 16 and a receiver 17 integrated therein, a signal connected to the microphone 16 and input through the microphone 16 A microphone amplifying means 13 for amplifying the receiver a receiver amplifying means 14 connected to the receiver 17 for amplifying a signal input to the receiver 17, the microphone amplifying means 13 and the receiver amplifying means 14 A central processing unit (CPU) 11 connected to the CPU 11, a handset 12 connected to the CPU 11, and transmission / reception means 10 connected to the CPU 11 to process signals for transmission and reception. Hand-free circuit, characterized in that. 제1항에 있어서, 상기 마이크 증폭수단(13)은 상기 마이크(16)에 일단이 연결된 제1콘덴서(C2), 상기 마이크(16)에 일단이 연결된 제1저항(R3), 상기 제1저항(R3)의 타단과 상기 제1콘덴서(C2)의 타단에 연결된 제2저항(R2), 상기 제1콘덴서(C2)의 타단에 베이스가 연결되고 에미터는 접지된 npn트랜지스터(TR1), 상기 제1저항(R3)의 타단과 상기 npn트랜지스터(TR1)의 콜렉터에 연결된 제3저항(R1), 상기 npn트랜지스터(TR1)의 콜렉터에 일단이 연결된 제2콘덴서(Cl), 및 상기 제2콘덴서(Cl)의 타단에 입력단이 연결되고 상기 CPU(11)에 출력단이 연결된 버퍼(19)로 구성되는 것을 특징으로 하는 핸드 프리 회로.According to claim 1, wherein the microphone amplifying means 13 is a first capacitor (C2) one end is connected to the microphone 16, the first resistor (R3), one end connected to the microphone 16, the first resistor An npn transistor TR1 connected to a second resistor R2 connected to the other end of R3 and the other end of the first capacitor C2, the other end of the first capacitor C2, and an emitter connected to a ground, A third capacitor R1 connected to the other end of the first resistor R3 and the collector of the npn transistor TR1, a second capacitor Cl having one end connected to the collector of the npn transistor TR1, and the second capacitor ( And a buffer (19) having an input connected to the other end of Cl) and an output connected to the CPU (11). 제1항에 있어서, 상기 리시버 증폭수단(14)은 상기 CPU(11)에 일단이 연결된 제1콘덴서(C3), 상기 제1콘덴서(C3)의 타단에 연결된 제1저항(R7), 전원에 연결된 제2저항(R5), 상기 제1 및 제2저항(R7, R5)에 입력단이 연결된 증폭기(20) , 상기 증폭기(20)의 출력단과 상기 리시버(17)에 연결된 제2콘덴서(C4) , 및 상기 증폭기(20)의 입출력단에 연결된 제3저항(R4)으로 구성되는 것을 특징으로 하는 핸드 프리 회로.The method of claim 1, wherein the receiver amplifying means 14 is a first capacitor (C3), one end of which is connected to the CPU 11, the first resistor (R7) connected to the other end of the first capacitor (C3), power An amplifier 20 having an input terminal connected to the second resistor R5 connected to the first and second resistors R7 and R5, an output terminal of the amplifier 20, and a second capacitor C4 connected to the receiver 17. And a third resistor (R4) connected to an input / output terminal of the amplifier (20). 마이크(16)와 리시버(17)가 일체로 구성된 헤드세트(15), 상기 마이크(16)에 연결되어 상기 마이크(16)를 통해 입력되는 신호를 증폭하는 마이크 증폭수단(13), 상기 리시버(17)에 연결되어 상기 리시버(17)로 입력되는 신호를 증폭하는 리시버 증폭수단(14), 상기 마이크 증폭수단(13)과 리시버 증폭수단(14)에 연결된 CPU(Central Procesing Unit)(11), 상기 CPU(11)에 연결된 핸드세트(12), 및 상기 CPU(11)에 연결되어 송수신을 위한 신호를 처리하는 송수신 수단(10)으로 구성되는 자동차 전화기의 핸드 프리 제어 방법에 있어서, 수신모드에서 오프-훅크(OFF-HOOK) 상태이면 오디오 경로를 상기 핸드 세트(12)로 하여 통화모드로 들어가는 제1단계(100, 110, 140), 상기 수신 모드에서 온-훅크(ON-HOOK) 상태이면 송신키의 DTMF(Dual Tone Multi-Freauency) 톤이 발생될 때까지 훅크의 상태를 검색하는 제2단계(110, 120), 및 상기 온-훅크인 상태에서 상기 송신기의 DTMF 톤이 발생하면 오디오 경로를 상기 헤드세트(15)로 하여 통화모드로 들어가는 제3단계(130)에 의해 수행하는 것을 특징으로 하는 핸드 프리 제어 방법.A headset 15 having a microphone 16 and a receiver 17 integrated therein, a microphone amplifying means 13 and a receiver connected to the microphone 16 to amplify a signal input through the microphone 16. A receiver amplifying means 14 connected to the receiver 17 to amplify a signal input to the receiver 17, a central processing unit 11 connected to the microphone amplifying means 13 and the receiver amplifying means 14, A hand-free control method for an automobile telephone comprising a handset 12 connected to the CPU 11 and a transmission / reception means 10 connected to the CPU 11 for processing signals for transmission and reception, in a receiving mode. In the OFF-HOOK state, the first steps (100, 110, 140) of entering the call mode using the audio path to the handset 12, and the ON-HOOK state in the receive mode. Retrieve the status of the hook until a Dual Tone Multi-Freauency (DTMF) tone of the transmit key is generated. In the second step (110, 120) and when the DTMF tone of the transmitter in the on-hook state occurs by the third step 130 to enter the call mode with the audio path to the headset (15) Hand-free control method characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910016627A 1991-09-24 1991-09-24 Hand-free circuit and control method of car-phone KR940004459B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910016627A KR940004459B1 (en) 1991-09-24 1991-09-24 Hand-free circuit and control method of car-phone

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Application Number Priority Date Filing Date Title
KR1019910016627A KR940004459B1 (en) 1991-09-24 1991-09-24 Hand-free circuit and control method of car-phone

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KR930007135A true KR930007135A (en) 1993-04-22
KR940004459B1 KR940004459B1 (en) 1994-05-25

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