KR840002778A - Fm수신기 - Google Patents

Fm수신기 Download PDF

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Publication number
KR840002778A
KR840002778A KR1019820005085A KR820005085A KR840002778A KR 840002778 A KR840002778 A KR 840002778A KR 1019820005085 A KR1019820005085 A KR 1019820005085A KR 820005085 A KR820005085 A KR 820005085A KR 840002778 A KR840002778 A KR 840002778A
Authority
KR
South Korea
Prior art keywords
receiver
diode
input
circuit
voltage
Prior art date
Application number
KR1019820005085A
Other languages
English (en)
Inventor
가스캄프 아르놀두스
Original Assignee
디. 제이. 삭커스
엔. 브이. 필립스 글로아이람펜파브리켄
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 디. 제이. 삭커스, 엔. 브이. 필립스 글로아이람펜파브리켄 filed Critical 디. 제이. 삭커스
Publication of KR840002778A publication Critical patent/KR840002778A/ko

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/06—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators
    • H03D3/08—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators by means of diodes, e.g. Foster-Seeley discriminator
    • H03D3/10—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators by means of diodes, e.g. Foster-Seeley discriminator in which the diodes are simultaneously conducting during the same half period of the signal, e.g. radio detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

내용 없음.

Description

FM수신기
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 FM수신기에 사용하는 IF회로 및 비검파기의 회로도를 도시한다.
제2도는 게르마늄 다이오드를 사용했을때와 실리콘 다이오드를 사용했을 IF입력에 인가된 IF-FM신호의 함수로서 비검파기 출력신호 진폭의 변화를 그린 곡선을 도시한다.
제3도는 본 발명에 따른 FM수신기의 회로도를 도시한다.

Claims (3)

  1. 비검파기 입력 신호의 진폭에 따라 비검파기 출력신호의 다이나믹 진폭을 제한하기 위하여 다이오드에 도통하게 접속된 평활 콘덴서와 마찬가지로 FM채널에서 FM신호의 검파를 위한 실리콘 다이오드와 협동하는 비검파기, RF입력단, 혼합단 및 IF회로를 구비한 FM채널이 안테나 입력에 접속된 FM수신기에서, 비검파기의 실리콘 검파 다이오드 앞의 FM채널부에서 발생한 잡음이 다이오드에 평균 잡음 전압을 공급하여 다이오드의 순방향 전류와 동일한 실리콘 다이오드의 임계 전압 및 평균 잡음과 일치하며 이 평균잡음은 평활회로 양단의 전압이 0에서 벗어나서 dc전압을 발생하는 것을 특징으로 하는 실리콘 다이오드를 가진 비검파기를 사용한 FM수신기.
  2. 제1항의 FM수신기에서 RF입력 단자에서 잡음 펙터가 적어도 4dB이며, IF회로의 대역이 적어도 100KHz이며, 입력강도가 4㎶/3dB보다 적은 값인 것을 특징으로 하는 실리콘 다이오드를 가진 비검파기를 사용한 FM수신기.
  3. 제2항의 FM수신기에서 입력단의 잡음 펙터가 5dB이며 IF회로의 대역이 150KHz 및 입력감도가 10㎶/3dB인 것을 특징으로 하는 실리콘 다이오드를 가진 비검파기를 사용한 FM수신기.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019820005085A 1981-11-13 1982-11-10 Fm수신기 KR840002778A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8105147A NL8105147A (nl) 1981-11-13 1981-11-13 Fm-ontvanger voorzien van een ratiodetektor met siliciumdiodes.
NL05147 1981-11-13

Publications (1)

Publication Number Publication Date
KR840002778A true KR840002778A (ko) 1984-07-16

Family

ID=19838367

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019820005085A KR840002778A (ko) 1981-11-13 1982-11-10 Fm수신기

Country Status (11)

Country Link
US (1) US4499605A (ko)
JP (1) JPS5888906A (ko)
KR (1) KR840002778A (ko)
BR (1) BR8206522A (ko)
DE (1) DE3240854C2 (ko)
ES (1) ES517268A0 (ko)
FR (1) FR2516725B1 (ko)
GB (1) GB2110021B (ko)
HK (1) HK28286A (ko)
IT (1) IT1154543B (ko)
NL (1) NL8105147A (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5214708A (en) * 1991-12-16 1993-05-25 Mceachern Robert H Speech information extractor
JP3473511B2 (ja) * 1999-07-22 2003-12-08 三菱電機株式会社 マルチパスノイズ除去装置、オーディオ出力装置およびｆｍ受信機

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501077A (en) * 1947-12-26 1950-03-21 Rca Corp Ratio detector circuit
FR1600318A (ko) * 1968-01-24 1970-07-20
DE1766326A1 (de) * 1968-05-04 1971-07-01 Itt Ind Gmbh Deutsche Schaltungsanordnung nach Art eines Radiodetektors
US3633134A (en) * 1969-10-10 1972-01-04 Motorola Inc Crystal band pass filter circuit
JPS5439161Y2 (ko) * 1975-06-23 1979-11-20
JPS5335413A (en) * 1976-09-14 1978-04-01 Mitsubishi Electric Corp Noise limiter circuit for fm receivers

Also Published As

Publication number Publication date
GB2110021B (en) 1985-11-06
DE3240854A1 (de) 1983-05-26
ES8308175A1 (es) 1983-08-01
GB2110021A (en) 1983-06-08
BR8206522A (pt) 1983-09-27
FR2516725B1 (fr) 1986-02-28
US4499605A (en) 1985-02-12
JPS5888906A (ja) 1983-05-27
HK28286A (en) 1986-04-25
DE3240854C2 (de) 1986-08-28
ES517268A0 (es) 1983-08-01
NL8105147A (nl) 1983-06-01
IT8224149A0 (it) 1982-11-10
FR2516725A1 (fr) 1983-05-20
IT1154543B (it) 1987-01-21

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