JPS6286759U - - Google Patents
Info
- Publication number
- JPS6286759U JPS6286759U JP1725486U JP1725486U JPS6286759U JP S6286759 U JPS6286759 U JP S6286759U JP 1725486 U JP1725486 U JP 1725486U JP 1725486 U JP1725486 U JP 1725486U JP S6286759 U JPS6286759 U JP S6286759U
- Authority
- JP
- Japan
- Prior art keywords
- control transistor
- signal
- circuit
- outputs
- detection circuit
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Description
図面は本考案の通信接続状態表示回路を含み、
保持機能を有する電話機回路のブロツク図である
。
主な図番の説明、１９……電圧検出回路、２２
……第１コンパレーター、２４……第２コンパレ
ーター、２６……パルス幅識別回路、２９……第
１制御トランジスタ、３０……第２制御トランジ
スタ。
The drawing includes the communication connection status display circuit of the present invention,
FIG. 2 is a block diagram of a telephone circuit with a hold function. Explanation of main drawing numbers, 19 ... Voltage detection circuit, 22
...first comparator, 24...second comparator, 26...pulse width identification circuit, 29...first control transistor, 30...second control transistor.
Claims (1)
線の通話状態を検知して第１比較信号を出力する
電１電圧検出回路と、前記通話状態における、補
助機態の動作による電話回線間の電圧の変化を検
出して第２比較信号を出力する第２電圧検出回路
と、前記第１比較信号、第２比較信号とにより、
電話回線の使用状態に対応した検出信号を出力す
る検出回路と、前記、検出回路より出力された検
出信号を一定期間識別した時のみ識別信号を出力
するパルス幅識別回路と、前記パルス幅識別回路
より出力される識別信号を入力することによりパ
ルス信号を出力する報知信号発生回路と、前記第
１電圧検出回路よりの出力により制御される第１
制御トランジスタと、前記第１制御トランジスタ
に直列に接続され、前記報知信号発生回路の出力
により制御される第２制御トランジスタと、前記
第１制御トランジスタに直列接続され、第１制御
トランジスタと第２制御トランジスタにより制御
されて電話回線の使用状態の表示を行なう表示素
子とよりなる通信接続状態表示回路。 a voltage detection circuit that detects the telephone call state of the telephone line by detecting the voltage between the telephone lines and outputs a first comparison signal; A second voltage detection circuit that detects a change and outputs a second comparison signal, and the first comparison signal and second comparison signal,
a detection circuit that outputs a detection signal corresponding to the usage state of the telephone line; a pulse width identification circuit that outputs an identification signal only when the detection signal output from the detection circuit is identified for a certain period of time; and the pulse width identification circuit. a notification signal generation circuit that outputs a pulse signal by inputting an identification signal output from the first voltage detection circuit;
a control transistor; a second control transistor connected in series with the first control transistor and controlled by the output of the notification signal generation circuit; a first control transistor and a second control transistor connected in series with the first control transistor; A communication connection status display circuit consisting of a display element that is controlled by a transistor and displays the usage status of a telephone line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1725486U JPH0411403Y2 (en) | 1986-02-07 | 1986-02-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1725486U JPH0411403Y2 (en) | 1986-02-07 | 1986-02-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6286759U true JPS6286759U (en) | 1987-06-03 |
| JPH0411403Y2 JPH0411403Y2 (en) | 1992-03-23 |
Family
ID=30809842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1725486U Expired JPH0411403Y2 (en) | 1986-02-07 | 1986-02-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411403Y2 (en) |
-
1986
- 1986-02-07 JP JP1725486U patent/JPH0411403Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0411403Y2 (en) | 1992-03-23 |
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