JPH0266056U - - Google Patents
Info
- Publication number
- JPH0266056U JPH0266056U JP14562088U JP14562088U JPH0266056U JP H0266056 U JPH0266056 U JP H0266056U JP 14562088 U JP14562088 U JP 14562088U JP 14562088 U JP14562088 U JP 14562088U JP H0266056 U JPH0266056 U JP H0266056U
- Authority
- JP
- Japan
- Prior art keywords
- rectifier
- transformer
- modem
- modulation
- ground
- 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
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 1
Landscapes
- Communication Control (AREA)
Description
第１図は本考案を適用したデータ通信装置の構
成を示すブロツク図、第２図は本考案におけるブ
リツジ整流回路及びＤＣ／ＤＣ電圧コンバータの
回路構成図、第３図は第２図に係るＤＣ／ＤＣ電
圧コンバータの動作波形図である。
２０……ＲＳ２３２Ｃインターフエイス回路、
２４……マイクロプロセツサコントローラ、２６
……モデム、２８……２線４線回路、３２……Ｎ
ＣＵ、３４……電話機、４１……ＤＣ／ＤＣ電圧
コンバータ、ＢＤ……ブリツジ整流回路、４２…
…絶縁性トランス、４６……ブリツジ整流器。
FIG. 1 is a block diagram showing the configuration of a data communication device to which the present invention is applied, FIG. 2 is a circuit configuration diagram of a bridge rectifier circuit and a DC/DC voltage converter in the present invention, and FIG. 3 is a DC/DC voltage converter according to FIG. FIG. 3 is an operation waveform diagram of the /DC voltage converter. 20...RS232C interface circuit,
24...Microprocessor controller, 26
...Modem, 28...2-wire 4-wire circuit, 32...N
CU, 34...telephone, 41...DC/DC voltage converter, BD...bridge rectifier circuit, 42...
...Isolation transformer, 46...Bridge rectifier.
Claims (1)
への電力供給を行う変復調装置の電源回路におい
て、 端末機と変復調器との間における電圧信号の伝
達を行うＲＳ２３２Ｃ規格の信号伝送ケーブルの
所定の複数の信号線に接続され、それぞれの信号
を取り出す整流回路と、 各整流回路の出力側に接続されその内部に絶縁
性トランスを含むＤＣ／ＤＣ電圧コンバータと、 前記ＤＣ／ＤＣ電圧コンバータ内におけるトラ
ンスの二次側コイルの両端出力を整流する整流器
と、を含み、 前記トランスの二次側中間電圧端子を前記入力
信号線のグラウンドに接続することにより整流器
の出力から得られる正負電圧を変復調装置に供給
することを特徴とする変復調装置の電源回路。[Scope of Claim for Utility Model Registration] In a power supply circuit of a modem device that supplies power to a modem installed between a terminal device and a communication line, the transmission of voltage signals between the terminal device and the modem device is provided. A rectifier circuit that is connected to a plurality of predetermined signal lines of an RS232C standard signal transmission cable and extracts each signal, and a DC/DC voltage converter that is connected to the output side of each rectifier circuit and includes an insulating transformer inside. , a rectifier that rectifies the outputs at both ends of the secondary coil of the transformer in the DC/DC voltage converter, and the rectifier is connected to the ground of the input signal line by connecting the secondary intermediate voltage terminal of the transformer to the ground of the input signal line. A power supply circuit for a modulation/demodulation device, characterized in that it supplies positive and negative voltages obtained from an output to the modulation/demodulation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14562088U JPH0266056U (en) | 1988-11-08 | 1988-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14562088U JPH0266056U (en) | 1988-11-08 | 1988-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266056U true JPH0266056U (en) | 1990-05-18 |
Family
ID=31414375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14562088U Pending JPH0266056U (en) | 1988-11-08 | 1988-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266056U (en) |
-
1988
- 1988-11-08 JP JP14562088U patent/JPH0266056U/ja active Pending
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