JPS6312959U - - Google Patents
Info
- Publication number
- JPS6312959U JPS6312959U JP9483886U JP9483886U JPS6312959U JP S6312959 U JPS6312959 U JP S6312959U JP 9483886 U JP9483886 U JP 9483886U JP 9483886 U JP9483886 U JP 9483886U JP S6312959 U JPS6312959 U JP S6312959U
- Authority
- JP
- Japan
- Prior art keywords
- mode
- switch means
- signal indicating
- output
- semiconductor switch
- 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
- 239000004065 semiconductor Substances 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 3
Description
第1図は本考案の実施例を示す回路図、第2図
は本考案の他の実施例を示す回路図、第3図は従
来例を示す回路図である。
2……キー入力回路、3……制御回路、4……
トーン発生回路、5……トーン出力回路、6……
パルス発生回路、7……パルス出力回路、8……
モード出力トランジスタ、14,16……抵抗、
15……トランジスタ、17……モード切換スイ
ツチ、18,19……ダイオード、22,23,
25……抵抗、24……トランジスタ。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing another embodiment of the present invention, and FIG. 3 is a circuit diagram showing a conventional example. 2...Key input circuit, 3...Control circuit, 4...
Tone generation circuit, 5... Tone output circuit, 6...
Pulse generation circuit, 7... Pulse output circuit, 8...
Mode output transistor, 14, 16...resistor,
15...transistor, 17...mode changeover switch, 18,19...diode, 22,23,
25...Resistor, 24...Transistor.
Claims (1)
ス出力モードが交互に切換えられると共にモード
を示す信号が出力される電話機に於いて、前記モ
ードを示す信号が印加される半導体スイツチ手段
と、電源電圧を前記半導体スイツチ手段に印加す
るモード切換スイツチと、前記半導体スイツチ手
段の出力をモード切換入力端に印加する手段とを
備え、前記モード切換スイツチの操作で所定モー
ドになつたとき、次の切換スイツチの操作を無効
とすることを特徴とする電話機のモード切換回路
。 A telephone in which a dial tone output mode and a pulse output mode are alternately switched with each key operation and a signal indicating the mode is output includes a semiconductor switch means to which the signal indicating the mode is applied, and a semiconductor switch means to which the signal indicating the mode is applied; a mode change-over switch for applying voltage to the switch means; and means for applying the output of the semiconductor switch means to a mode change-over input terminal; A telephone mode switching circuit characterized in that it is disabled.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9483886U JPS6312959U (en) | 1986-06-20 | 1986-06-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9483886U JPS6312959U (en) | 1986-06-20 | 1986-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6312959U true JPS6312959U (en) | 1988-01-28 |
Family
ID=30958704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9483886U Pending JPS6312959U (en) | 1986-06-20 | 1986-06-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6312959U (en) |
-
1986
- 1986-06-20 JP JP9483886U patent/JPS6312959U/ja active Pending