JPS61139041U - - Google Patents

Description

Translated fromJapanese

【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, and9 is an adding means.

Claims (1)

Translated fromJapanese

【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.