JPS61139041U - - Google Patents

Info

Publication number
JPS61139041U
JPS61139041U JP2138785U JP2138785U JPS61139041U JP S61139041 U JPS61139041 U JP S61139041U JP 2138785 U JP2138785 U JP 2138785U JP 2138785 U JP2138785 U JP 2138785U JP S61139041 U JPS61139041 U JP S61139041U
Authority
JP
Japan
Prior art keywords
transformer
input
output
output signal
whose
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
JP2138785U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP2138785U priority Critical patent/JPS61139041U/ja
Publication of JPS61139041U publication Critical patent/JPS61139041U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Transceivers (AREA)
  • Telephone Set Structure (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Description

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

図面は本考案に係る電話装置の送受信回路を示
す図である。 １はトランス、３は送信用トランジスタ、４は
受信用トランジスタ、９は加算手段。 The drawing is a diagram showing a transmitting and receiving circuit of a telephone device according to the present invention. 1 is a transformer, 3 is a transmitting transistor, 4 is a receiving transistor, and 9 is an adding means.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] １次側が電話回線側に、２次側が電話装置側に
夫々接続されたトランスと、入力側に送信信号が
印加され、出力側より出力される第１の出力信号
が前記トランジスの２次側に印加される送信用ト
ランジスタと、入力側が前記トランスの２次側に
接続され、出力側より電話回線を介して入力され
た受信信号を得る受信用トランジスタと、前記送
信用トランジスタより出力される前記第１の出力
信号とこれと逆相の第２の出力信号とを加算して
前記送信用トランジスタの入力側に印加する加算
手段とよりなる電話装置の送受信回路。 A transformer whose primary side is connected to a telephone line side and whose secondary side is connected to a telephone device side, a transmission signal is applied to the input side, and a first output signal outputted from the output side is connected to the secondary side of the transformer. a receiving transistor whose input side is connected to the secondary side of the transformer and obtains a received signal input from the output side via the telephone line; 1. A transmitting/receiving circuit for a telephone device, comprising an adding means for adding a first output signal and a second output signal having an opposite phase thereto and applying the resultant to the input side of the transmitting transistor.
JP2138785U 1985-02-18 1985-02-18 Pending JPS61139041U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2138785U JPS61139041U (en) 1985-02-18 1985-02-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2138785U JPS61139041U (en) 1985-02-18 1985-02-18

Publications (1)

Publication Number Publication Date
JPS61139041U true JPS61139041U (en) 1986-08-28

Family

ID=30512733

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2138785U Pending JPS61139041U (en) 1985-02-18 1985-02-18

Country Status (1)

Country Link
JP (1) JPS61139041U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012138680A (en) * 2010-12-24 2012-07-19 Sony Corp Full duplex transmission circuit and electronic apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5168708A (en) * 1974-12-11 1976-06-14 Ricoh Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5168708A (en) * 1974-12-11 1976-06-14 Ricoh Kk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012138680A (en) * 2010-12-24 2012-07-19 Sony Corp Full duplex transmission circuit and electronic apparatus

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