JPS62119033U - - Google Patents

Info

Publication number
JPS62119033U
JPS62119033U JP685886U JP685886U JPS62119033U JP S62119033 U JPS62119033 U JP S62119033U JP 685886 U JP685886 U JP 685886U JP 685886 U JP685886 U JP 685886U JP S62119033 U JPS62119033 U JP S62119033U
Authority
JP
Japan
Prior art keywords
filters
receiver
receiving
band switching
switching function
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP685886U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP685886U priority Critical patent/JPS62119033U/ja
Publication of JPS62119033U publication Critical patent/JPS62119033U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Superheterodyne Receivers (AREA)
  • Noise Elimination (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本考案の一実施例を示すブロツク図、
第2図は本考案による帯域切換え動作を説明する
ためのフローチヤート、第3図はそのタイミング
チヤート、第4図は従来例を示すブロツク図であ
る。 主要部分の符号の説明、2……高周波増幅回路
、3a,3b……帯域切換えスイツチ、4……広
帯域IFフイルタ、5……狭帯域IFフイルタ、
12……スイツチ駆動回路、13……ゲート回路
、14……コントローラ、15……ミユーテイン
グ回路、20……PLL回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a flow chart for explaining the band switching operation according to the present invention, FIG. 3 is a timing chart thereof, and FIG. 4 is a block diagram showing a conventional example. Explanation of symbols of main parts, 2... High frequency amplifier circuit, 3a, 3b... Band switching switch, 4... Wideband IF filter, 5... Narrowband IF filter,
12... Switch drive circuit, 13... Gate circuit, 14... Controller, 15... Muting circuit, 20... PLL circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 帯域幅が異なる少なくとも2つのIF(中間周
波)フイルタを備え、受信状態に応じて前記少な
くとも2つのIFフイルタの1つを選択する帯域
切換え機能を有する受信機であつて、所望の局の
受信時に一定の時間間隔で極短時間だけ受信周波
数を変化せしめる手段と、前記受信周波数の変化
時に妨害波が存在するか否かを検出する検出手段
とを備え、前記検出手段の検出出力に基づいて前
記少なくとも2つのIFフイルタの1つを選択す
るようになされたことを特徴とする帯域切換え機
能を有する受信機。
A receiver comprising at least two IF (intermediate frequency) filters with different bandwidths and having a band switching function of selecting one of the at least two IF filters depending on the reception condition, when receiving a desired station. comprising means for changing the receiving frequency for a very short time at regular time intervals, and detecting means for detecting whether or not interference waves are present when the receiving frequency changes, and based on the detection output of the detecting means. 1. A receiver having a band switching function, characterized in that one of at least two IF filters is selected.
JP685886U 1986-01-20 1986-01-20 Pending JPS62119033U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP685886U JPS62119033U (en) 1986-01-20 1986-01-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP685886U JPS62119033U (en) 1986-01-20 1986-01-20

Publications (1)

Publication Number Publication Date
JPS62119033U true JPS62119033U (en) 1987-07-28

Family

ID=30789765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP685886U Pending JPS62119033U (en) 1986-01-20 1986-01-20

Country Status (1)

Country Link
JP (1) JPS62119033U (en)

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