JPS6172928U - - Google Patents
Info
- Publication number
- JPS6172928U JPS6172928U JP15775384U JP15775384U JPS6172928U JP S6172928 U JPS6172928 U JP S6172928U JP 15775384 U JP15775384 U JP 15775384U JP 15775384 U JP15775384 U JP 15775384U JP S6172928 U JPS6172928 U JP S6172928U
- Authority
- JP
- Japan
- Prior art keywords
- reference voltage
- drive signal
- stop sensitivity
- comparator
- sensitivity
- 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
Links
- 230000035945 sensitivity Effects 0.000 claims description 8
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１図は本考案による自動停止感度設定回路を
具備する受信機の構成を示すブロツク図、第２図
は本考案による停止感度切換え回路および自動停
止信号発生回路の回路図、第３図は広帯域ＡＧＣ
駆動出力端子電圧と広帯域電界強度の関係を示す
グラフである。
１…アンテナ、２…フロントエンド、３…中間
周波増幅および検波回路、４…ノイズキヤンセラ
およびマルチブレツクス回路、５…電力増幅器、
６…スピーカ、７…停止感度切換え回路、８…自
動停止信号発生回路、９…制御回路、１０…広帯
域ＡＧＣ駆動出力端子、１１…停止信号発生端子
、１２…比較器、１３…ＤＸ／ＬＯ切換え端子、
ＶＲ１…ＤＸ停止感度調整用可変抵抗器、ＶＲ２
…基準電圧設定用可変抵抗器、Ｑ１…ＮＰＮトラ
ンジスタ、Ｄ１，Ｄ２…ダイオード。
Fig. 1 is a block diagram showing the configuration of a receiver equipped with an automatic stop sensitivity setting circuit according to the present invention, Fig. 2 is a circuit diagram of a stop sensitivity switching circuit and an automatic stop signal generation circuit according to the present invention, and Fig. 3 is a wideband AGC
It is a graph showing the relationship between drive output terminal voltage and broadband electric field strength. DESCRIPTION OF SYMBOLS 1...Antenna, 2...Front end, 3...Intermediate frequency amplification and detection circuit, 4...Noise canceller and multiplex circuit, 5...Power amplifier,
6... Speaker, 7... Stop sensitivity switching circuit, 8... Automatic stop signal generation circuit, 9... Control circuit, 10... Wideband AGC drive output terminal, 11... Stop signal generation terminal, 12... Comparator, 13... DX/LO switching terminal,
VR1...variable resistor for adjusting DX stop sensitivity, VR2
...variable resistor for setting reference voltage, Q1...NPN transistor, D1, D2...diode.
Claims (1)
準電圧と比較する比較器と自動停止感度を切り換
えるトランジスタを含み、ＡＧＣ駆動信号が基準
電圧以下になると、上記比較器出力が上記トラン
ジスタをオンし、停止感度を強制的に固定するこ
とを特徴とする自動停止感度設定回路。 (2) ＡＧＣ駆動信号が基準電圧以下に低下した
とき、上記比較器出力が停止感度をLOCALモード
に固定することを特徴とする実用新案登録請求の
範囲第１項記載の自動停止感度設定回路。[Claims for Utility Model Registration] (1) It includes a comparator that compares the AGC drive signal of the front end circuit with a reference voltage and a transistor that switches automatic stop sensitivity, and when the AGC drive signal becomes less than the reference voltage, the comparator outputs turns on the transistor and forcibly fixes the stop sensitivity. (2) The automatic stop sensitivity setting circuit according to claim 1, wherein the comparator output fixes the stop sensitivity to LOCAL mode when the AGC drive signal drops below a reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15775384U JPS6172928U (en) | 1984-10-19 | 1984-10-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15775384U JPS6172928U (en) | 1984-10-19 | 1984-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6172928U true JPS6172928U (en) | 1986-05-17 |
Family
ID=30715740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15775384U Pending JPS6172928U (en) | 1984-10-19 | 1984-10-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6172928U (en) |
-
1984
- 1984-10-19 JP JP15775384U patent/JPS6172928U/ja active Pending
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