JPS583651U - Tone signal detection circuit - Google Patents
Tone signal detection circuitInfo
- Publication number
- JPS583651U JPS583651U JP1981098039U JP9803981U JPS583651U JP S583651 U JPS583651 U JP S583651U JP 1981098039 U JP1981098039 U JP 1981098039U JP 9803981 U JP9803981 U JP 9803981U JP S583651 U JPS583651 U JP S583651U
- Authority
- JP
- Japan
- Prior art keywords
- tone signal
- signal detection
- detection circuit
- rectifier
- circuit
- 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
- Mobile Radio Communication Systems (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
第１図は従来のトーン信号検出回路を示すブロック図、
第２図ａ、 ｂ、 ｃはそれぞれ従来のトーン信号
検出回路の動作を説明するタイムチャート、第３図は本
考案に係わるトーン信号検出回路を示すブロック図であ
る。
１・・・・・・信号入力端子、２，１２・・・・・・低
周波増幅器、３・・・・・・帯域フィルタ、４，１３・
・・・・・整流器、５・・・・・・レベル弁別器、６・
・・・・・信号出力端子、７・・・・・・バーストトー
ン信号、訃・・・・・出力パルス、１０・・・・・・Ａ
ＧＣ回路、１１・・・・・・可変減衰器。FIG. 1 is a block diagram showing a conventional tone signal detection circuit.
2a, b, and c are time charts illustrating the operation of the conventional tone signal detection circuit, respectively, and FIG. 3 is a block diagram showing the tone signal detection circuit according to the present invention. 1... Signal input terminal, 2, 12... Low frequency amplifier, 3... Bandpass filter, 4, 13...
... Rectifier, 5 ... Level discriminator, 6.
...Signal output terminal, 7...Burst tone signal, Death...Output pulse, 10...A
GC circuit, 11...variable attenuator.
Claims (3)
出出力を整流器を介して出力するトーン信号−、検出回
路において、前記帯域フィルタと整流器との間に自動利
得制御回路を挿入したことを特徴とするトーン信号検出
回路。(1) A tone signal detection circuit that detects a tone signal using a bandpass filter and outputs the detection output via a rectifier, characterized in that an automatic gain control circuit is inserted between the bandpass filter and the rectifier. Tone signal detection circuit.
む整流器を用いて整流し、該整流器の出力に対応して可
変減衰器を制御するものである実用新案登録請求の範囲
第（１）項記載のトーン信号検出回路。(2) The automatic gain control circuit rectifies the output signal using a rectifier including a smoothing circuit, and controls a variable attenuator in accordance with the output of the rectifier.Claim No. 1 of Utility Model Registration The tone signal detection circuit described in Section 1.
を大きく設定したことを特徴とする実用新案登録請求の
範囲第（２）項記載のトーン信号検出回路。(3) The tone signal detection circuit according to claim (2), wherein the smoothing circuit has a small charging time constant and a large discharging time constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981098039U JPS583651U (en) | 1981-06-30 | 1981-06-30 | Tone signal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981098039U JPS583651U (en) | 1981-06-30 | 1981-06-30 | Tone signal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS583651U true JPS583651U (en) | 1983-01-11 |
Family
ID=29892808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981098039U Pending JPS583651U (en) | 1981-06-30 | 1981-06-30 | Tone signal detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS583651U (en) |
-
1981
- 1981-06-30 JP JP1981098039U patent/JPS583651U/en active Pending
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