JPS6232650U - - Google Patents
Info
- Publication number
- JPS6232650U JPS6232650U JP12402785U JP12402785U JPS6232650U JP S6232650 U JPS6232650 U JP S6232650U JP 12402785 U JP12402785 U JP 12402785U JP 12402785 U JP12402785 U JP 12402785U JP S6232650 U JPS6232650 U JP S6232650U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pair
- attenuators
- transmitting
- comparator
- 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 1
Description
第２図は従来の構成図、第１図は本考案の一実
施例である。
１：ＦＥＴ１（Ｑ１）、２：ＦＥＴ２（Ｑ２）
、３：受話信号入力端子、４：受話信号出力端子
、５：信号レベル検出器、６：送話信号入力端子
、７：送話信号出力端子、８，９：オペアンプ、
１０：基準電圧、１１：抵抗、１２：抵抗。
FIG. 2 is a conventional configuration diagram, and FIG. 1 is an embodiment of the present invention. 1: FET 1 (Q 1 ), 2: FET 2 (Q 2 )
, 3: Receiving signal input terminal, 4: Receiving signal output terminal, 5: Signal level detector, 6: Transmitting signal input terminal, 7: Transmitting signal output terminal, 8, 9: Operational amplifier,
10: Reference voltage, 11: Resistor, 12: Resistor.
Claims (1)
を検出し、信号レベルの大きい方の信号を通過さ
せ、信号レベルの小さい方の信号を遮断するよう
に、それぞれ逆方向の減衰度を与える一対の減衰
器を送信および受話信号路に挿入してなるハンズ
・フリー端末機において、一対の減衰器にＦＥＴ
を用い、又該送信および受話信号レベルを比較す
る比較器を有し、その出力に接続された積分器出
力信号で一対のＦＥＴのゲート電圧を制御するこ
とにより該一対の減衰器の減衰量を可変すること
を特徴とするハンズ・フリー端末機。 A pair of attenuators that detect the magnitude of the signal level of the transmitted signal and the received signal and provide attenuation degrees in opposite directions so that the signal with the higher signal level is passed and the signal with the lower signal level is blocked. In a hands-free terminal device in which a receiver is inserted into the transmitting and receiving signal path, an FET is installed in a pair of attenuators.
It also has a comparator that compares the transmitting and receiving signal levels, and the attenuation amount of the pair of attenuators is controlled by controlling the gate voltage of the pair of FETs with the integrator output signal connected to the output of the comparator. A hands-free terminal device characterized by being variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12402785U JPS6232650U (en) | 1985-08-14 | 1985-08-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12402785U JPS6232650U (en) | 1985-08-14 | 1985-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6232650U true JPS6232650U (en) | 1987-02-26 |
Family
ID=31015667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12402785U Pending JPS6232650U (en) | 1985-08-14 | 1985-08-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6232650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61222637A (en) * | 1985-03-27 | 1986-10-03 | Fujitsu Ltd | Production of thin sheet elastic material having spring pressure of high accuracy |
| US20160125918A1 (en) * | 2014-10-30 | 2016-05-05 | Nhk Spring Co., Ltd. | Warp correction apparatus for plate-like workpiece and warp correction method |
-
1985
- 1985-08-14 JP JP12402785U patent/JPS6232650U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61222637A (en) * | 1985-03-27 | 1986-10-03 | Fujitsu Ltd | Production of thin sheet elastic material having spring pressure of high accuracy |
| JPH0334408B2 (en) * | 1985-03-27 | 1991-05-22 | Fujitsu Ltd | |
| US20160125918A1 (en) * | 2014-10-30 | 2016-05-05 | Nhk Spring Co., Ltd. | Warp correction apparatus for plate-like workpiece and warp correction method |
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