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KR950022306A - Frequency common communication terminal with sidetone suppression circuit - Google Patents

Frequency common communication terminal with sidetone suppression circuit Download PDF

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Publication number
KR950022306A
KR950022306A KR1019930026739A KR930026739A KR950022306A KR 950022306 A KR950022306 A KR 950022306A KR 1019930026739 A KR1019930026739 A KR 1019930026739A KR 930026739 A KR930026739 A KR 930026739A KR 950022306 A KR950022306 A KR 950022306A
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KR
South Korea
Prior art keywords
signal
voice
frequency
transmission
low frequency
Prior art date
Application number
KR1019930026739A
Other languages
Korean (ko)
Inventor
김동준
Original Assignee
정장호
금성정보통신 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 정장호, 금성정보통신 주식회사 filed Critical 정장호
Priority to KR1019930026739A priority Critical patent/KR950022306A/en
Publication of KR950022306A publication Critical patent/KR950022306A/en

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Abstract

본 발명은 주파수 공용통신 단말기에 관한 것으로, 특히 송신용으로 변조된 신호를 수신용 국부 발진 주파수 신호로 이용하기 때문에 발생하는 측음을 제거하기에 절당하도록 한 측음 제거회로를 갖는 주파수 공용 통신 단말기에 관한 것이다. 본 발명의 주파수 공용 통신 단말기는 무선 통신용 고주파 신호를 방사하거나 수신하기 위한 안테나와, 송수신에 필요한 변조된 고주파 송신신호와 반송주파수를 발생시키기 위한 주파수 합성부와, 상기 안테나로 부터 받은 고주파 신호를 상기 주파수 합성부로 부터의 반송주파수를 이용하여 복조된 저주파 신호를 발생하기 위한 수신부와, 외부로 부터 입력되는 음성을 전기 신호로 변환하여 출력하기 위한 음성/전기 변환수기, 상기 음성/전기 변환수단으로부터 전기 신호에 응답하여 송신 변조용 음성 신호를 발생하고 상기 복조된 저주파 신호를 처리하여 출력하며 단말기 전체 동작을 제어하기 위한 음성처리 및 제어부와 상기 음성처리 및 제어부로 부터으 저주파 신호에 응답하여 음성 출력을 발명하기 위한 전기/음성 변환 수단고, 상기 주파수 합성부의 변조된 고주파 송시신호를 증폭하여 상기 안테나로 출력하기 위한 송신부와, 수신된 저주파 신호와 함께, 상기 주파수 합성부와 수신부를 통하여 귀환되는 송신변조용 음성신호를 상기 송신 변조용 음성 신호의 지연신호를 이용하여 수신된 저주파 신호만을 상기 음성 처리 및 제어부로 출력하기 위한 측음제거 수단으로 구성된다.The present invention relates to a frequency common communication terminal, and more particularly, to a frequency common communication terminal having a side tone removing circuit adapted to remove side noises generated by using a modulated signal for transmission as a local oscillation frequency signal for reception. will be. The frequency common communication terminal of the present invention includes an antenna for radiating or receiving a radio frequency signal for wireless communication, a frequency synthesizer for generating a modulated high frequency transmission signal and a carrier frequency required for transmission and reception, and a high frequency signal received from the antenna. A receiver for generating a demodulated low frequency signal using a carrier frequency from the frequency synthesizer, a voice / electric converter for converting the voice input from the outside into an electric signal, and outputting the voice from the voice / electric converter Generates a voice signal for transmission modulation in response to the signal, processes and outputs the demodulated low frequency signal, and outputs a voice output in response to a low frequency signal from the voice processing and control unit and a voice processing and control unit for controlling the overall operation of the terminal. Electrical / voice conversion means for invention, the frequency A delay of the transmission modulated voice signal, which is transmitted through the frequency synthesizer and the receiver, together with a transmitter for amplifying and outputting the modulated high frequency transmitted signal to the antenna and the received low frequency signal And a sidetone removing means for outputting only the low frequency signal received using the signal to the voice processing and control unit.

Description

측음제거 회로를 갖는 주파수 공용 통신 단말기Frequency common communication terminal with sidetone suppression circuit

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

제2도는 볼 발명에 따른 측음 제거 회로를 가진 주파수 공용통신 단말기의 회로구성을 나타낸 개략블록도이다.2 is a schematic block diagram showing a circuit configuration of a frequency common communication terminal having a sidetone removing circuit according to the present invention.

Claims (3)

무선 통신용 고주파 신호를 방사하거나 수신하기 위한 안테나와, 송수신에 필요한 변조된 고주파 송신신호와 국부 발진 주파수를 발생시키기 위한 주파수 합성부와, 상기 안테나로 부터 받은 고주파 신호를 상기 주파수 합성부로 부터의 국부발진 주파수를 이용하여 복조된 저주파 신호를 발생하기 위한 수신부와, 외부로 부터 입력되는 음성을 전기 신호로 변환하여 출력하기 위한 음성/전기 변환수단, 상기 음성/전기 변환수단으로부터 전기 신호에 응답하여 송신 변조용 음성 신호를 발생하고 상기 복조된 저주파 신호를 처리하여 출력하며 단말기 전체 동작을 제어하기 위한 음성처리 및 제어부와 상기 음성처리 및 제어부로 부터의 저주파 신호에 응답하여 음성 출력을 발생하기 위한 전기/음성 변환 수단과, 상기 주파수 합성부의 변조된 고주파 송신신호를 증폭하여 상기 안테나로 출력하기 위한 송신부와, 수신된 저주파 신호와 함께, 상기 주파수 합성부와 수신부를 통하여 귀환되는 송신변조용 음성신호를 상기 송신 변조용 음성 신호의 지연신호를 이용하여 수신된 저주파 신호만을 상기 음성 처리 및 제어부로 출력하기 위한 측음제거 수단으로 구성되는 것을 특징으로 하는 측음 제거 기능을 갖는 주파수 공용 통신 단말기.An antenna for radiating or receiving a radio frequency signal for wireless communication, a frequency synthesizer for generating a modulated high frequency transmission signal and a local oscillation frequency required for transmission and reception, and a local oscillation from the frequency synthesizer for a high frequency signal received from the antenna A receiver for generating a demodulated low frequency signal using a frequency, voice / electric conversion means for converting and outputting voice input from the outside into an electrical signal, and transmission modulation in response to the electrical signal from the voice / electric conversion means Generates a voice signal, processes and outputs the demodulated low frequency signal, and processes and outputs a voice signal for controlling the overall operation of the terminal; and an electric / voice for generating a voice output in response to the low frequency signal from the voice signal and the controller. A conversion means, and a modulated high frequency part of the frequency combining section A transmission modulator for amplifying a new signal and outputting the signal to the antenna, and a received modulated voice signal fed back through the frequency synthesizer and the receiver, together with the received low frequency signal, are received using a delay signal of the transmission modulated voice signal. And a sidetone removing means for outputting only the low frequency signal to the voice processing and control unit. 제1항에 있어서, 상기 측음 제거 수단은 상기 송신 변조용 음성신호를 소정시간 지연시키기 위한 지연수단과, 비 반전단자를 통하여 인가된 사익 지연된 송신 변조용 음성 신호와 반전단자를 통하여 인가된 상기 수신부의 복조된 저주파 신호를 가산하여 안테나를 통하여 수신된 저주파 신호만을 출력하기 위한 합증폭기로 구성되는 것을 특징으로 하는 주파수 공용 통신 단말기.2. The apparatus of claim 1, wherein the sidetone removing means comprises: delay means for delaying the transmission modulated voice signal for a predetermined time, a sound delayed transmission modulated voice signal applied through a non-inverting terminal, and the receiving unit applied through a reverse terminal. And a demodulation amplifier configured to output only a low frequency signal received through the antenna by adding a demodulated low frequency signal of the terminal. 제2항에 있어서, 상기 소정 시간은 송신 변조용 음성신호가 상기 주파수 합성부와 수신부를 통하여 상기 합증폭기에 인가되는 시간과 동일하게 설정한 것을 특징으로 하는 주파수 공용 통신 단말기.3. The frequency common communication terminal as set forth in claim 2, wherein the predetermined time is set equal to the time for which the transmission modulation voice signal is applied to the combining amplifier through the frequency combining unit and the receiving unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930026739A 1993-12-07 1993-12-07 Frequency common communication terminal with sidetone suppression circuit KR950022306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930026739A KR950022306A (en) 1993-12-07 1993-12-07 Frequency common communication terminal with sidetone suppression circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930026739A KR950022306A (en) 1993-12-07 1993-12-07 Frequency common communication terminal with sidetone suppression circuit

Publications (1)

Publication Number Publication Date
KR950022306A true KR950022306A (en) 1995-07-28

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KR1019930026739A KR950022306A (en) 1993-12-07 1993-12-07 Frequency common communication terminal with sidetone suppression circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100255364B1 (en) * 1997-01-15 2000-05-01 윤종용 Radio receiver for suppressing attenuation properties of a low-frequency signal and method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100255364B1 (en) * 1997-01-15 2000-05-01 윤종용 Radio receiver for suppressing attenuation properties of a low-frequency signal and method thereof

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PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19931207

PG1501 Laying open of application
PC1203 Withdrawal of no request for examination
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid