JPS5816943U - Squelch circuit in radio equipment - Google Patents
Squelch circuit in radio equipmentInfo
- Publication number
- JPS5816943U JPS5816943U JP11006481U JP11006481U JPS5816943U JP S5816943 U JPS5816943 U JP S5816943U JP 11006481 U JP11006481 U JP 11006481U JP 11006481 U JP11006481 U JP 11006481U JP S5816943 U JPS5816943 U JP S5816943U
- Authority
- JP
- Japan
- Prior art keywords
- squelch circuit
- squelch
- level
- circuit
- utility
- 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
Landscapes
- Noise Elimination (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のスケルチ回路のブロック図、第２図は本
考案によるスケルチ回路の一実施例を示すブロック図、
第３図は電圧比較器のヒステリシス特性図である。
１．１０・・・入力端子、２．１４・・・バンドパスフ
ィルタ回路、３．１５・・・検波回路、４．１７・・・
スイッチング回路、５．１１・・・オーディオ回路、６
゜１２・・・スピーカ、１３・・・スケルチ回路、１６
・・・電圧比較器、１８．１９・・・可変抵抗。FIG. 1 is a block diagram of a conventional squelch circuit, and FIG. 2 is a block diagram showing an embodiment of the squelch circuit according to the present invention.
FIG. 3 is a hysteresis characteristic diagram of the voltage comparator. 1.10...Input terminal, 2.14...Band pass filter circuit, 3.15...Detection circuit, 4.17...
Switching circuit, 5.11...Audio circuit, 6
゜12...Speaker, 13...Squelch circuit, 16
...Voltage comparator, 18.19...Variable resistor.
Claims (3)
レベルが一定以上か否かによってオン、オフ制御するよ
うにしたスケルを回路において、該スケルチ回路中に、
該識別信号の検波出力で作動し、その作動のためのオン
レベルとオフレベルにヒステリシス特性を有し、カッつ
検波出力と比較するための基準電圧レベルを可変するこ
とのできる電圧比較器を具備してなることを特徴とする
無線機におけるスケルチ回路。(1) In the squelch circuit, a squelch is controlled to be turned on and off depending on whether the electric field strength level of the own station's identification signal included in the received signal is above a certain level, and in the squelch circuit,
Equipped with a voltage comparator that operates on the detection output of the identification signal, has hysteresis characteristics in the on level and off level for the operation, and can vary the reference voltage level for comparison with the cut detection output. A squelch circuit in a radio device characterized by:
波出力レベルを可変抵抗により可変することができるよ
うにした無線機におけるスケルチ回路。(2) Utility Model Registration The squelch circuit for a radio device as set forth in claim 1, wherein the detection output level can be varied by a variable resistor.
において、該識別信号はトーン信号からなり、スケルチ
回路は自局に対応したトーン信号ヲトラエルトーンスケ
ルチバンドパスフィルタ回路を具備してなる無線機にお
けるスケルチ回路。(3) Utility model registration Claims 1 or 2, wherein the identification signal is comprised of a tone signal, and the squelch circuit is equipped with a tone squelch band-pass filter circuit that converts the tone signal corresponding to the own station. Squelch circuit in radio equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11006481U JPS5816943U (en) | 1981-07-24 | 1981-07-24 | Squelch circuit in radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11006481U JPS5816943U (en) | 1981-07-24 | 1981-07-24 | Squelch circuit in radio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5816943U true JPS5816943U (en) | 1983-02-02 |
Family
ID=29904423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11006481U Pending JPS5816943U (en) | 1981-07-24 | 1981-07-24 | Squelch circuit in radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5816943U (en) |
-
1981
- 1981-07-24 JP JP11006481U patent/JPS5816943U/en active Pending
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