KR910007300A - Audio detection circuit - Google Patents

Audio detection circuit Download PDF

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Publication number
KR910007300A
KR910007300A KR1019890014177A KR890014177A KR910007300A KR 910007300 A KR910007300 A KR 910007300A KR 1019890014177 A KR1019890014177 A KR 1019890014177A KR 890014177 A KR890014177 A KR 890014177A KR 910007300 A KR910007300 A KR 910007300A
Authority
KR
South Korea
Prior art keywords
output
frequency
detection circuit
voltage controlled
controlled oscillator
Prior art date
Application number
KR1019890014177A
Other languages
Korean (ko)
Inventor
정종관
Original Assignee
서주인
삼성전기 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 서주인, 삼성전기 주식회사 filed Critical 서주인
Priority to KR1019890014177A priority Critical patent/KR910007300A/en
Publication of KR910007300A publication Critical patent/KR910007300A/en

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  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

내용 없음No content

Description

오디오 검파회로Audio detection circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 따른 오디오 검파회로도.2 is an audio detection circuit diagram according to the present invention.

Claims (1)

마이컴등에 의해서 선택된 채널 데이터에 따른 기준 주파수와 전압 제어발진기의 출력 주파수 위상을 비교하여 전압제어 발진기의 출력 주파수를 콘트롤하는 수단과, 상기 콘트롤 수단에 의해서 제어되는 전압제어 발진기에서 출력되는 주파수와 희망하는 멀티 오디오 부반송파를 믹서하는 수단과, 상기 수단에서 믹싱되어 출력되는 FM IF 신호중에서 잡음 주파수를 차단하는 필터 수단과, 그리고 필터링된 FM IF 신호와 발진기에서 공급된 주파수를 혼합하여 베이스밴드의 오디오 신호를 취출하는 검파수단을 구비하여 이루어짐을 특징으로 하는 오디오 검파회로.Means for controlling the output frequency of the voltage controlled oscillator by comparing the reference frequency according to the channel data selected by the microcomputer and the like with the output frequency phase of the voltage controlled oscillator, and the frequency output from the voltage controlled oscillator controlled by the control means. A baseband audio signal is mixed by means of mixing a multi-audio subcarrier, a filter means for cutting out noise frequencies among the FM IF signals mixed and output from the means, and a filtered FM IF signal and a frequency supplied from an oscillator. An audio detection circuit comprising a detection means for taking out. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890014177A 1989-09-29 1989-09-29 Audio detection circuit KR910007300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890014177A KR910007300A (en) 1989-09-29 1989-09-29 Audio detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890014177A KR910007300A (en) 1989-09-29 1989-09-29 Audio detection circuit

Publications (1)

Publication Number Publication Date
KR910007300A true KR910007300A (en) 1991-04-30

Family

ID=67661471

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890014177A KR910007300A (en) 1989-09-29 1989-09-29 Audio detection circuit

Country Status (1)

Country Link
KR (1) KR910007300A (en)

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