JPS5837241U - squelch circuit - Google Patents
squelch circuitInfo
- Publication number
- JPS5837241U JPS5837241U JP1981130962U JP13096281U JPS5837241U JP S5837241 U JPS5837241 U JP S5837241U JP 1981130962 U JP1981130962 U JP 1981130962U JP 13096281 U JP13096281 U JP 13096281U JP S5837241 U JPS5837241 U JP S5837241U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- transistor
- output
- switching
- tone
- 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
- Transceivers (AREA)
- 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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案の一実施例を示すトーンスケルチ回路である
。
1:トーン検出回路、2. 7:トランジスタ、5:切
替スイッチ、9ニスイツチング回路。The figure shows a tone squelch circuit showing one embodiment of the present invention. 1: Tone detection circuit, 2. 7: Transistor, 5: Selector switch, 9 Niswitching circuit.
Claims (1)
出回路の出力によってス・イツチング動作する第1のト
ランジスタと、この第1のトランジスタの出力回路を切
替える切替スイッチと、この切替スイッチの一方の出力
回路に接続する音声出力信号のスイッチング回路と、前
記切替スイッチの他方の出力回路及び前記スイッチング
回路との間に設けた反転スイッチング動作する第2のト
ランジスタとで構成し、前記切替スイッチにより音声出
力信号の立上り時間の比を変えることなく、トーン信号
の有無による音声出力信号の接、断の動作を反転させる
ことを特徴とするスケルチ回路。A tone detection circuit that detects a tone signal, a first transistor that performs a switching operation based on the output of the tone detection circuit, a changeover switch that changes over the output circuit of the first transistor, and an output circuit of one of the changeover switches. a switching circuit for the audio output signal connected to the switching circuit, and a second transistor that performs inverse switching operation and provided between the other output circuit of the changeover switch and the switching circuit, A squelch circuit is characterized in that it reverses the connection/disconnection of an audio output signal depending on the presence or absence of a tone signal without changing the rise time ratio.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981130962U JPS5837241U (en) | 1981-09-04 | 1981-09-04 | squelch circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981130962U JPS5837241U (en) | 1981-09-04 | 1981-09-04 | squelch circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5837241U true JPS5837241U (en) | 1983-03-10 |
Family
ID=29924564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1981130962U Pending JPS5837241U (en) | 1981-09-04 | 1981-09-04 | squelch circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5837241U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62102341U (en) * | 1985-12-19 | 1987-06-30 |
-
1981
- 1981-09-04 JP JP1981130962U patent/JPS5837241U/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62102341U (en) * | 1985-12-19 | 1987-06-30 |
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