JPS6150451A - Telephone with receiver volume switch - Google Patents

Telephone with receiver volume switch

Info

Publication number
JPS6150451A
JPS6150451A JP59172865A JP17286584A JPS6150451A JP S6150451 A JPS6150451 A JP S6150451A JP 59172865 A JP59172865 A JP 59172865A JP 17286584 A JP17286584 A JP 17286584A JP S6150451 A JPS6150451 A JP S6150451A
Authority
JP
Japan
Prior art keywords
turned
switch
gain
amplifier
fet2
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
Application number
JP59172865A
Other languages
Japanese (ja)
Inventor
Tadashi Omori
正 大森
Hiroshi Kawabe
河辺　博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59172865A priority Critical patent/JPS6150451A/en
Publication of JPS6150451A publication Critical patent/JPS6150451A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To attain ease of listening of received sound by using a switch so as to decrease transmitted sound volume and to increase received sound volume when the surrounding noise is large during talking and the received sound volume is small. CONSTITUTION:When a switch 2 is turned off, the transmission input from a handset 1 is amplified with a gain of (1+R1/R2) times by a transmission amplifier A1 while a switching element FET1 is turned off and the gain of the transmission signal is increased. Since the FET2 is turned off, the gain of the reception signal at the reception amplifier A2 is unity. When the switch 2 is turned on, the FETs 1, 2 are turned respectively on through R6, R7. Since the FET1 is turned on, no transmission signal is transmitted to a hybrid transformer 4. When the FET2 is turned on, the reception signal has a gain of (1+R4/R3) times by using the A2 than the case with the switch 2 turned off, to increase the gain of the reception signal.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、送話増巾器、受話増巾器を備えた電話機に利
用する受話音量切換スイッチ付電話機に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a telephone equipped with a receiving volume changeover switch, which is used in a telephone equipped with a transmitting amplification device and a receiving amplification device.

従来例の構成とその問題点 従来の電話機では、周囲騒音が大きく、かつ、相手から
の受話音量が小さい場合 ｆｌ＋　　送話機を手で抑えて受話を行っても、遮音が
充分に行われない為、側音により相手の音声が聞きとり
にくい。Conventional configuration and its problems With conventional telephones, when the ambient noise is large and the volume of the call from the other party is low, the sound isolation is not sufficient even if you press the transmitter with your hand to receive the call. , it is difficult to hear the other party's voice due to sidetone.

（２）他方の耳に入る音声にマスクされて、相手の音声
が小さい場合は、聞きとりにくさは改善されない。(2) If the other party's voice is low because it is masked by the voice entering the other ear, the difficulty of hearing will not be improved.

という問題点があった。There was a problem.

発明の目的 本発明は、上記従来の電話機の問題点を除去するもので
あり、周囲騒音が大きく、カつ、相手からの受話音量が
小さい場合に、１つのスイッチ操作で送話信号と受話信
号とを制御することを目的とする。OBJECT OF THE INVENTION The present invention eliminates the above-mentioned problems with conventional telephones.When the surrounding noise is large and the receiving volume from the other party is low, the present invention is capable of transmitting and receiving signals by operating a single switch. The purpose is to control the

発明の構成 本発明は、一つの機械的スイッチと、このスイッチの操
作に連動して送話信号を減衰させて受話信号と側音との
Ｓ／Ｎを改善させる第１のスイッチ手段と、受話信号を
増巾させて、受話音を聞きとりやすくする第２のスイッ
チ手段を備えた受話音量切換スイッチ付電話機である。Structure of the Invention The present invention comprises one mechanical switch, a first switch means that improves the S/N between the received signal and the sidetone by attenuating the transmitted signal in conjunction with the operation of the switch, and the receiving device. This telephone set is equipped with a receiving volume changeover switch and is equipped with a second switch means for amplifying the signal to make the receiving sound easier to hear.

実施例の説明 以下に本発明の一実施例の構成について、図面とともに
説明する。DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings.

図は本発明の一実施例である受話音量切換スイッチ付電
話機のブロック図である。The figure is a block diagram of a telephone set with a receiving volume changeover switch, which is an embodiment of the present invention.

図において、１は送話器、２は機械的なスイッチとして
の受話音量切換スイッチ、３は受話器。In the figure, 1 is a transmitter, 2 is a mechanical switch for changing the volume of a receiving volume, and 3 is a receiver.

４はハイブリットトランス、ＡＩは送話増巾器。4 is a hybrid transformer, and AI is a transmitting amplifier.

Ａ２は受話増巾器、ＦＢＴＩは第１のスイッチ手段とし
ての送話を禁止するだめのスイッチング素子、ＦＥＴ２
は第２のスイッチング手段としての受話増巾器Ａ２の利
得を決定するスイッチング素子、Ｒ１，Ｒ２はそれぞれ
増巾器Ａ１の送話時利得決定用抵抗器、Ｒ３，Ｒ４はそ
れぞれ増巾器Ａ２の受話時利得決定用抵抗器、Ｒ５はス
イッチＯＦＦ時にＦＥＴＩ、ＦＥＴ２のゲートを接地す
るための抵抗器、Ｒ６は１１ｉ”ＥＴｌのゲートバイア
ス抵抗器、Ｒ７はＦＥＴ２のゲートバイアス抵抗器であ
る。A2 is a receiver amplifier, FBTI is a switching element used as a first switch means to prohibit transmitting, and FET2
is a switching element that determines the gain of the receive amplifier A2 as a second switching means, R1 and R2 are resistors for determining the transmit gain of the amplifier A1, and R3 and R4 are the resistors of the amplifier A2, respectively. R5 is a resistor for determining the gain during reception, R5 is a resistor for grounding the gates of FETI and FET2 when the switch is OFF, R6 is a gate bias resistor of 11i''ETl, and R7 is a gate bias resistor of FET2.

次に上記実施例の動作について説明する。図に１　　　
　　　　　おいて、スイッチ２がＯＦＦしている場合は
、１からの送話人力は、スイッチング素子ＦＥＴｘ、が
ＯＦＦであり、そのためにＡＩＫよって（１＋Ｒ１／Ｒ
２）　（ここではＲ１，Ｒ２はそれぞれ抵抗Ｒ１゜Ｒ２
の抵抗値を表す）倍の利得を得て送話信号の利得を増す
。又、ＦＥＴ２もＯＦＦであるから、受話信号のＡ２で
の利得は１倍である。Next, the operation of the above embodiment will be explained. Figure 1
In this case, when switch 2 is OFF, the switching element FETx is OFF, and the transmitter power from 1 is therefore
2) (Here, R1 and R2 are resistances R1゜R2, respectively.
(representing the resistance value of ) to increase the gain of the transmitted signal. Furthermore, since FET2 is also OFF, the gain of the received signal at A2 is 1 times.

スイッチ２をＯＮＩ、たときはＦＥＴＩ、ＦＥＴ２がそ
れぞれＲ６，Ｒ７を通じてＯＮとなる。ＦＥＴ１がＯＮ
となることにより、送話信号は・・イブリットトランス
４に送出されない。又、ＦＥＴ２がＯＮとなることＫよ
り、受話信号はＡ２によりスイッチ２がＯＦＦのときよ
りも（１＋Ｒ４／Ｒ３）（ここではＲ３，Ｒ４はそれぞ
れ抵抗Ｒ３，Ｒ４の抵抗値を表す）倍の利得を得て受話
信号の利得を増す。When switch 2 is turned ON, FETI and FET2 are turned ON through R6 and R7, respectively. FET1 is ON
As a result, the transmission signal is not sent to the hybrid transformer 4. Also, since FET2 is turned ON, the received signal has a gain of (1+R4/R3) (here, R3 and R4 represent the resistance values of resistors R3 and R4, respectively) due to A2 than when switch 2 is OFF. to increase the gain of the received signal.

発明の効果 本発明は上記のような構成であシ、通話中に周囲騒音が
大きく、かつ相手からの受話音量が小さい場合Ｋ、一つ
のスイッチにより、送話音量を小さくシ、受話音量を大
きくできるために、送受話器を手で抑えたりしなくても
、受話音が聞きとりやすくなるという利点を有する。Effects of the Invention The present invention has the above-mentioned configuration, and when there is a lot of ambient noise during a call and the receiving volume from the other party is low, a single switch can be used to reduce the transmitting volume and increase the receiving volume. This has the advantage of making it easier to hear the received voice without having to hold the handset with your hand.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明の一実施例のブロック図である。 １・・・送話器、２・・受話音量切換スイッチ（機械的
なスイッチ）、３・・受話器、４・・・ハイブリットト
ランス、Ａ１・・送話増巾器、Ａ２・・・受話増巾器、
ＦＥＴＩ・・・第１のスイッチング手段（素子）、ＦＥ
Ｔ２・・第２のスイッチング手段（素子）。The drawing is a block diagram of one embodiment of the present invention. 1... Transmitter, 2... Receiving volume changeover switch (mechanical switch), 3... Receiver, 4... Hybrid transformer, A1... Transmitting amplifier, A2... Receiving amplifier. vessel,
FETI...first switching means (element), FE
T2: second switching means (element).

Claims (1)

【特許請求の範囲】[Claims] 送話増巾器、受話増巾器を備えた電話機であって、一つ
の機械的なスイッチと、このスイッチの押下に連動する
送話信号を減衰させる第１のスイッチ手段と、受話信号
を増巾させる第２のスイッチ手段とを備えた受話音量切
換スイッチ付電話機。A telephone equipped with a transmitting signal amplifier and a receiving signal amplifier, comprising one mechanical switch, a first switch means for attenuating the transmitting signal in response to pressing of the switch, and a first switch means for attenuating the transmitting signal and increasing the receiving signal. and a second switch means for increasing the volume of the telephone.
JP59172865A 1984-08-20 1984-08-20 Telephone with receiver volume switch Pending JPS6150451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59172865A JPS6150451A (en) 1984-08-20 1984-08-20 Telephone with receiver volume switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59172865A JPS6150451A (en) 1984-08-20 1984-08-20 Telephone with receiver volume switch

Publications (1)

Publication Number Publication Date
JPS6150451A true JPS6150451A (en) 1986-03-12

Family

ID=15949729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59172865A Pending JPS6150451A (en) 1984-08-20 1984-08-20 Telephone with receiver volume switch

Country Status (1)

Country Link
JP (1) JPS6150451A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6214561A (en) * 1985-07-11 1987-01-23 Toa Tokushu Denki Kk Sound volume controller for loudening telephone set
JPS62196444U (en) * 1986-05-30 1987-12-14

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6214561A (en) * 1985-07-11 1987-01-23 Toa Tokushu Denki Kk Sound volume controller for loudening telephone set
JPS62196444U (en) * 1986-05-30 1987-12-14

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