JPS5925864U - portable listening device - Google Patents
portable listening deviceInfo
- Publication number
- JPS5925864U JPS5925864U JP12064582U JP12064582U JPS5925864U JP S5925864 U JPS5925864 U JP S5925864U JP 12064582 U JP12064582 U JP 12064582U JP 12064582 U JP12064582 U JP 12064582U JP S5925864 U JPS5925864 U JP S5925864U
- Authority
- JP
- Japan
- Prior art keywords
- container
- amplifier
- earphone
- output side
- listening device
- 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
- Monitoring And Testing Of Exchanges (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ａは本考案の主要部となる高入力インピーダンス
増幅器の基本回路を示す回路図、第１図すは同応用回路
を示す回路図、栢２図は本考案の一実施例を示す回路図
、第３図はその外形斜視図、である。
符号説明、１・・・・・・信号入力端子、２・・・・・
・結合用コンデンサ、３・・・・・・帰還抵抗、４・・
・・・・信号出力端子、５・・・・・・ジャック、６・
・・・・・プラグ、７・・・・・・イヤホン、８・・・
・・・高入出力インピーダンス増幅器、９・・・・・・
電池、１０・・・・−・・筒状容器。Figure 1a is a circuit diagram showing the basic circuit of a high input impedance amplifier which is the main part of the present invention, Figure 1 is a circuit diagram showing an applied circuit of the same, and Figure 2 is a circuit diagram showing an embodiment of the present invention. FIG. 3 is a perspective view of its external appearance. Symbol explanation, 1...Signal input terminal, 2...
・Coupling capacitor, 3... Feedback resistor, 4...
...Signal output terminal, 5... Jack, 6.
...Plug, 7...Earphone, 8...
...High input/output impedance amplifier, 9...
Battery, 10... - Cylindrical container.
Claims (1)
たは奇数個直列接続し、その出力側から入力側へ帰還抵
抗を接続して成る増幅器およびその電源を筒形の容器に
収め、該容器の先端から前記増幅器の信号入力端を突出
させ、該容器の後端に取り付は固定したジャックに前記
増幅器の出力側および容器内の前記電源の回路を接続し
、イヤホンを接続したプラグを前記ジャックに差し込む
ことにより、イヤホンと前記増幅器の出力側が接続され
、かつ前記電源から増幅器に対する電源供給回路が形成
されるようにして成り、前記容器の先端から突出してい
る信号入力端を通話線に接触させることにより前記イヤ
ホンから通話内容を聴取可能にしたことを特徴とする携
帯可能な聴話器。An amplifier consisting of one or an odd number of inverters made of C-MO5 type integrated circuit elements connected in series, and a feedback resistor connected from the output side to the input side, and its power source are housed in a cylindrical container, and the tip of the container is The signal input end of the amplifier is made to protrude from the rear end of the container, and the output side of the amplifier and the power supply circuit inside the container are connected to a jack fixedly attached to the rear end of the container, and the plug to which the earphone is connected is connected to the jack. When inserted, the earphone and the output side of the amplifier are connected, and a power supply circuit is formed from the power source to the amplifier, and the signal input end protruding from the tip of the container is brought into contact with the communication line. A portable listening device characterized in that the content of a call can be heard through the earphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12064582U JPS5925864U (en) | 1982-08-10 | 1982-08-10 | portable listening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12064582U JPS5925864U (en) | 1982-08-10 | 1982-08-10 | portable listening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5925864U true JPS5925864U (en) | 1984-02-17 |
Family
ID=30276427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12064582U Pending JPS5925864U (en) | 1982-08-10 | 1982-08-10 | portable listening device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5925864U (en) |
-
1982
- 1982-08-10 JP JP12064582U patent/JPS5925864U/en active Pending
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