JPS5920740U - squelch circuit - Google Patents
squelch circuitInfo
- Publication number
- JPS5920740U JPS5920740U JP11495882U JP11495882U JPS5920740U JP S5920740 U JPS5920740 U JP S5920740U JP 11495882 U JP11495882 U JP 11495882U JP 11495882 U JP11495882 U JP 11495882U JP S5920740 U JPS5920740 U JP S5920740U
- Authority
- JP
- Japan
- Prior art keywords
- squelch circuit
- active filter
- control signal
- audio signal
- signal
- 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
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を示す回路図、及び第２図
は本考案によるスケルチ回路の一実施例を示す回路図で
ある。
１０・・・アクティブフィルタ、ＱＩＯ・・・トランジ
スタ、Ｒ□５・・・抵抗、ｉｎ ｌ Ｑ・・・第１の入
力端、１ｎｌｌ・・・第２の入力端、ＯＵＴ・・・出力
端子。FIG. 1 is a circuit diagram showing a conventional squelch circuit, and FIG. 2 is a circuit diagram showing an embodiment of the squelch circuit according to the present invention. 10... Active filter, QIO... Transistor, R□5... Resistor, in l Q... First input terminal, 1nll... Second input terminal, OUT... Output terminal.
Claims (1)
て音声信号の通過を制御するスケルチ回路であって、前
記直流制御信号と前記音声信号とが入力されるアクティ
ブフィルタを有し、このアクティブフィルタを構成して
いるトランジスタのコレクタを抵抗を介して直流電源に
接続し、前記直流制御信号によって前記トランジス゛り
を導通して前記アクティブフィルタを動作させ、前記ト
ランジスタのコレクタから前記音声信号を出力するよう
にしたことを特徴とするスケルチ回路。A squelch circuit that controls passage of an audio signal by a DC control signal generated depending on the presence or absence of a received signal, the squelch circuit having an active filter to which the DC control signal and the audio signal are input, and the active filter The collectors of the constituent transistors are connected to a DC power supply via a resistor, the transistors are made conductive by the DC control signal to operate the active filter, and the audio signal is output from the collector of the transistor. The squelch circuit is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11495882U JPS5920740U (en) | 1982-07-30 | 1982-07-30 | squelch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11495882U JPS5920740U (en) | 1982-07-30 | 1982-07-30 | squelch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5920740U true JPS5920740U (en) | 1984-02-08 |
Family
ID=30265535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11495882U Pending JPS5920740U (en) | 1982-07-30 | 1982-07-30 | squelch circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920740U (en) |
-
1982
- 1982-07-30 JP JP11495882U patent/JPS5920740U/en active Pending
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