JPS61163469U - - Google Patents
Info
- Publication number
- JPS61163469U JPS61163469U JP4539585U JP4539585U JPS61163469U JP S61163469 U JPS61163469 U JP S61163469U JP 4539585 U JP4539585 U JP 4539585U JP 4539585 U JP4539585 U JP 4539585U JP S61163469 U JPS61163469 U JP S61163469U
- Authority
- JP
- Japan
- Prior art keywords
- receiving
- input
- transmitting
- level
- input level
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
Description
第１図は本考案に係る拡声電話機の一実施例を
示すブロツク的電気回路図、第２図は従来の拡声
電話機のブロツク的電気回路図、第３図ａ，ｂは
送信用電子ボリウムおよび受信用電子ボリウムの
調整位置と比較回路の入力条件の違いによる減衰
カーブを示す特性線図である。
２：受信用電子ボリユウム、７：送信用電子ボ
リユウム、９：比較回路、１０：コントロール回
路、１２：受信レベルコントロールボリユウム。
Fig. 1 is a block electric circuit diagram showing an embodiment of the loudspeaker telephone according to the present invention, Fig. 2 is a block electric circuit diagram of a conventional loudspeaker telephone, and Figs. 3a and 3b show the transmitting electronic volume and the receiving FIG. 4 is a characteristic diagram showing attenuation curves depending on the adjustment position of the electronic volume control circuit and the input conditions of the comparison circuit. 2: Electronic volume for reception, 7: Electronic volume for transmission, 9: Comparison circuit, 10: Control circuit, 12: Reception level control volume.
Claims (1)
衰量と、及び送信入力を減衰させる送信用電子ボ
リウラの減衰量とが、受信入力レベルと送信入力
レベルの比較器による比較結果によつて切換える
ようになされた拡声電話機において、前記受信入
力レベルを受け入れる上記比較器の入力端子の前
段に受信入力レベルを変化させる受信レベルコン
トロールボリユウムを挿入して成る拡声電話機。 The attenuation amount of the receiving electronic volume that attenuates the receiving input and the attenuation amount of the transmitting electronic volume regulator that attenuates the transmitting input are switched based on the comparison result of the receiving input level and the transmitting input level by a comparator. A loudspeaker telephone comprising a receiving level control volume for changing the receiving input level inserted before the input terminal of the comparator for receiving the receiving input level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985045395U JPH0432843Y2 (en) | 1985-03-26 | 1985-03-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985045395U JPH0432843Y2 (en) | 1985-03-26 | 1985-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61163469U true JPS61163469U (en) | 1986-10-09 |
| JPH0432843Y2 JPH0432843Y2 (en) | 1992-08-06 |
Family
ID=30558860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985045395U Expired JPH0432843Y2 (en) | 1985-03-26 | 1985-03-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0432843Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5894257A (en) * | 1981-11-30 | 1983-06-04 | Fujitsu Ltd | Voice switching circuit |
-
1985
- 1985-03-26 JP JP1985045395U patent/JPH0432843Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5894257A (en) * | 1981-11-30 | 1983-06-04 | Fujitsu Ltd | Voice switching circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0432843Y2 (en) | 1992-08-06 |
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