KR970055232A - Car audio FM noise reduction device - Google Patents

Car audio FM noise reduction device Download PDF

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Publication number
KR970055232A
KR970055232A KR1019950065799A KR19950065799A KR970055232A KR 970055232 A KR970055232 A KR 970055232A KR 1019950065799 A KR1019950065799 A KR 1019950065799A KR 19950065799 A KR19950065799 A KR 19950065799A KR 970055232 A KR970055232 A KR 970055232A
Authority
KR
South Korea
Prior art keywords
electric field
car audio
field strength
treble
antenna
Prior art date
Application number
KR1019950065799A
Other languages
Korean (ko)
Inventor
옥도길
Original Assignee
배순훈
대우전자 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.)
Filing date
Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950065799A priority Critical patent/KR970055232A/en
Publication of KR970055232A publication Critical patent/KR970055232A/en

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  • Noise Elimination (AREA)

Abstract

마이컴을 이용하여 자동차의 주행시에 약전계의 수신시에 카 오디오의 트레블조정을 가변시켜 노이즈를 감쇄시키고 깨끗한 음질을 제공하는 카 오디오의 FM노이즈 감쇄장치가 개시된다. 본 발명은 안테나를 통하여 유입된 FM주파수의 전계강도를 판단하여 약전계라고 판단되면 트레블을 감소하는 방향으로 조정하는 방법을 기존의 HCC 회로에 의한 노이즈차단방법에 부가한다. 카오디오에 수신된 FM주파수의 전계강도를 감지바는 SM단자에서 수신된 주파수의 전계강도를 파악한 마이컴에의하여 전계강도가 약하면 출력되는 음성 신호에서 고음역을 강조하는 트레블조정을 미약하게 함으로써 고음부의 감쇄효과에 의한 약전계시 노이즈를 대폭 경감한다.Disclosed is an FM noise reduction device for car audio that uses a microcomputer to vary the treble adjustment of car audio when receiving a weak electric field while driving a car to reduce noise and provide clean sound quality. The present invention adds a method of determining the electric field strength of the FM frequency introduced through the antenna to adjust the direction of the treble to reduce the treble if it is determined to be a weak electric field to the noise blocking method by the existing HCC circuit. The microcomputer detects the electric field strength of the FM frequency received by the car audio. The microcomputer detects the electric field strength of the frequency received by the SM terminal. Significantly reduces noise during weak electric field due to effects.

※선택도:제2도※ Selectivity: The second

Description

카 오디오의 FM 노이즈 감쇄장치Car audio FM noise reduction device

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

제 3도는 본 발명에 따른 카 오디오의 FM 노이즈 감쇄장치를 동작을 설명하기 위한 흐름도이다.3 is a flowchart illustrating the operation of the FM audio attenuator for car audio according to the present invention.

Claims (2)

자동차의 소정위치에 장착되어 전파를 수신하는 안테나(10), 상기 안테나(10)의 출력단에는 특정주파수를 선택하는 FM튜너부(20) 및 입력된 음성 신호를 증폭하여 스피커(60)를 통하여 출력시키는 파워회로(50)를 구비하는 카 오디오에 있어서, 상기 FM튜너부(20)의 일측에 접속되어 전계강도에 비례하는 전압을 출력시키는 SM단자(21); 상기 SM단자(21)의 출력신호에 의하여 수신된 주파수의 전계강도를 판단하고, 노이즈를 감쇄시키는 제어를 수행하는 제어부(30); 상기 제어부(30)의 출력되는 제어신호에 따라 고음역의 강조를 위한 트레블조정을 증가 및 감소하는 음성처리부(40)로 이루어진 것을 특징으로 하는 카 오디오의 FM노이즈 감쇄장치.An antenna 10 mounted at a predetermined position of a vehicle for receiving radio waves, an FM tuner 20 for selecting a specific frequency at an output end of the antenna 10, and amplifying an input voice signal and outputting the same through a speaker 60 A car audio having a power circuit (50), comprising: an SM terminal (21) connected to one side of the FM tuner unit (20) to output a voltage proportional to electric field strength; A control unit (30) for determining an electric field strength of a frequency received by the output signal of the SM terminal (21), and controlling to attenuate noise; FM audio attenuation device of the car audio, characterized in that made of a voice processing unit 40 to increase and decrease the treble adjustment for the emphasis of the high range in accordance with the control signal output from the control unit (30). 카 오디오에 있어서, 안테나를 통하여 유입된 FM주파수의 전계강도를 판단하여 약전계라고 판단되면 트레블을 감소하는 방향으로 조정하는 방법을 구비하는 카 오디오의 FM 노이즈 감쇄장치.In car audio, FM audio attenuation apparatus of a car audio comprising a method of determining the electric field strength of the FM frequency introduced through the antenna to adjust the direction of the treble if it is determined to be a weak electric field. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950065799A 1995-12-29 1995-12-29 Car audio FM noise reduction device KR970055232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950065799A KR970055232A (en) 1995-12-29 1995-12-29 Car audio FM noise reduction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950065799A KR970055232A (en) 1995-12-29 1995-12-29 Car audio FM noise reduction device

Publications (1)

Publication Number Publication Date
KR970055232A true KR970055232A (en) 1997-07-31

Family

ID=66624208

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950065799A KR970055232A (en) 1995-12-29 1995-12-29 Car audio FM noise reduction device

Country Status (1)

Country Link
KR (1) KR970055232A (en)

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