JPS61162173U - - Google Patents
Info
- Publication number
- JPS61162173U JPS61162173U JP4573485U JP4573485U JPS61162173U JP S61162173 U JPS61162173 U JP S61162173U JP 4573485 U JP4573485 U JP 4573485U JP 4573485 U JP4573485 U JP 4573485U JP S61162173 U JPS61162173 U JP S61162173U
- Authority
- JP
- Japan
- Prior art keywords
- telephone circuit
- circuit
- signal
- gain control
- receiving
- 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
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例のブロツク図、第２
図は第１図の一実施例の受話系回路の特性を示す
図、第３図は従来の電話機回路のブロツク図、第
４図は第３図の受話系回路の特性を示す図である
。
４……回線、５……受話入力アンプ、６……検
波回路、７……受話閾値回路、８……コンパレー
タ、９……アンプ、１０……ボリユーム、１２…
…ＡＧＣアンプ。
Figure 1 is a block diagram of one embodiment of the present invention;
1, FIG. 3 is a block diagram of a conventional telephone circuit, and FIG. 4 is a diagram showing characteristics of the receiving circuit shown in FIG. 3. 4... Line, 5... Receiving input amplifier, 6... Detection circuit, 7... Receiving threshold circuit, 8... Comparator, 9... Amplifier, 10... Volume, 12...
...AGC amplifier.
Claims (1)
る音量調整手段と、該受話信号に対する利得制御
を行なう受話ＡＧＣ回路とを備えた電話機回路に
おいて、前記受話ＡＧＣ回路の後段に前記音量調
整手段を配置したことを特徴とする電話機回路。 (2) 受話ＡＧＣ回路は、入力される受話信号と
基準信号とに基き、前記受話信号に対する利得制
御を行なうことを特徴とする実用新案登録請求の
範囲第(1)項記載の電話機回路。[Claims for Utility Model Registration] (1) A telephone circuit comprising a volume adjustment means for adjusting the level of a received signal in accordance with a predetermined operation, and a receive AGC circuit that performs gain control on the received signal; A telephone circuit characterized in that the volume adjustment means is disposed at a subsequent stage of the telephone circuit. (2) The telephone circuit according to claim (1), wherein the receiving AGC circuit performs gain control on the receiving signal based on the input receiving signal and a reference signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4573485U JPS61162173U (en) | 1985-03-28 | 1985-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4573485U JPS61162173U (en) | 1985-03-28 | 1985-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61162173U true JPS61162173U (en) | 1986-10-07 |
Family
ID=30559494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4573485U Pending JPS61162173U (en) | 1985-03-28 | 1985-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61162173U (en) |
-
1985
- 1985-03-28 JP JP4573485U patent/JPS61162173U/ja active Pending
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