JPS61103947U - - Google Patents
Info
- Publication number
- JPS61103947U JPS61103947U JP18729684U JP18729684U JPS61103947U JP S61103947 U JPS61103947 U JP S61103947U JP 18729684 U JP18729684 U JP 18729684U JP 18729684 U JP18729684 U JP 18729684U JP S61103947 U JPS61103947 U JP S61103947U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- modulation
- demodulation
- input
- output
- 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
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
第３図は従来のモデムのＤＣループ形成回路、
第２図は接続構成回路、第１図はこの考案の一実
施例、第４図はこの考案の動作説明図。
２２：変調回路、２３：復調回路、２５：ルー
プ形成回路、２６：制御回路。
Figure 3 shows the DC loop forming circuit of a conventional modem.
FIG. 2 is a connection configuration circuit, FIG. 1 is an embodiment of this invention, and FIG. 4 is an explanatory diagram of the operation of this invention. 22: Modulation circuit, 23: Demodulation circuit, 25: Loop forming circuit, 26: Control circuit.
Claims (1)
調装置の直流信号を折返す回路において、変調回
路の入力信号を復調回路の出力信号へ折返す切替
回路、変調回路の入力信号を定期的にＯＮ／ＯＦ
Ｆして変調回路入力とする切替回路、及び復調回
路出力を変調回路入力に切替えしさらに直列に定
期的にＯＮ／ＯＦＦして変換回路入力とする切替
回路を有して自局の直流折返し情報をキヤリアの
ＯＮ／ＯＦＦにより相手局に伝送する機能を設け
た変復調装置。 In a circuit that folds back a DC signal of a modulation/demodulation device consisting of a modulation circuit, a demodulation circuit, and a control circuit, there is a switching circuit that folds back an input signal of the modulation circuit to an output signal of the demodulation circuit, and a switch circuit that periodically turns the input signal of the modulation circuit ON/OFF.
A switching circuit that switches the output of the demodulation circuit to the input of the modulation circuit, and further switches the output of the demodulation circuit to the input of the modulation circuit and periodically turns it on and off in series to input the conversion circuit. A modulation/demodulation device that has the function of transmitting the information to the other station by turning the carrier ON/OFF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18729684U JPS61103947U (en) | 1984-12-12 | 1984-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18729684U JPS61103947U (en) | 1984-12-12 | 1984-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61103947U true JPS61103947U (en) | 1986-07-02 |
Family
ID=30744757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18729684U Pending JPS61103947U (en) | 1984-12-12 | 1984-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61103947U (en) |
-
1984
- 1984-12-12 JP JP18729684U patent/JPS61103947U/ja active Pending