KR930020906A - Line interface of wired terminal device - Google Patents
Line interface of wired terminal device Download PDFInfo
- Publication number
- KR930020906A KR930020906A KR1019920004988A KR920004988A KR930020906A KR 930020906 A KR930020906 A KR 930020906A KR 1019920004988 A KR1019920004988 A KR 1019920004988A KR 920004988 A KR920004988 A KR 920004988A KR 930020906 A KR930020906 A KR 930020906A
- Authority
- KR
- South Korea
- Prior art keywords
- voltage
- loop forming
- polarity
- line interface
- current
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
유선 단말 장치의 라인 인터페이스에 관한 것으로, 특히 직류 전류의 특성을 양호하게 개선시킨 라인 인터페이스에 관한것이다.The present invention relates to a line interface of a wired terminal device, and more particularly, to a line interface with improved characteristics of a direct current.
상기의 라인 인터페이스는 전화 라인(L1, L2)으로 입력되는 직류전압을 전파정류하여 극성정렬된 직류전압을 출력하는 극성정렬수단과, 상기 극성정력수단의 출력 양단자에 접속되어 있으며, 소정레벨의 구동전압의 입력에 의해 응답 스위칭되어 상기에서 출력되는 직류전압의 전류 루프를 형성하여 바이패스하는 전류 루프형성수단과, 상기 극성정렬수단의 출력단자에 접속되어 극성 정렬된 적류전압을 소정 레벨의 전압으로 분압하여 상기 전류루프형성수단을 구동하는 루프 형성 구동수단과, 상기 루프형성 구동수단의 출력단자와 상기 루프 형성부의 입력단자 사이에 접속되어 상기 루프 형성부의 스위칭 시간을 조절하는 과도 응답시간 조절수단으로 구성되어 있다.The line interface is connected to the polarity sorting means for full-wave rectifying the DC voltage inputted to the telephone lines L1 and L2 and outputting the polarized aligned DC voltage, and to the both terminals of the outputs of the polarity rectifying means. A current loop forming means for response-switching by input of a driving voltage to form a current loop of the DC voltage outputted above, and bypassing the current loop forming means; A loop forming driving means for driving the current loop forming means by dividing the voltage into a loop; and a transient response time adjusting means connected between an output terminal of the loop forming driving means and an input terminal of the loop forming portion to adjust the switching time of the loop forming portion. It consists of.
상기와 같은 구성으로 전화라인을 인터페이스함으로써 극성 반전시 직류 전류의 과도응단을 안정화 시킬 수 있으며, 통화 품질을 양호하게 할 수 있다.By interfacing the telephone line with the configuration as described above, it is possible to stabilize the transient response of the DC current during polarity inversion and to improve the call quality.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제3도는 본 발명에 따른 유선단말 장치의 라인 인터페이스의 회로도이다.3 is a circuit diagram of a line interface of a wired terminal device according to the present invention.
제4도는 제1도의 직류 전류 특성 그래프 및 제3도의 전류 특성 그래프이다.4 is a graph of direct current characteristics of FIG. 1 and a graph of current characteristics of FIG.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920004988A KR940010849B1 (en) | 1992-03-26 | 1992-03-26 | Terminal interface circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920004988A KR940010849B1 (en) | 1992-03-26 | 1992-03-26 | Terminal interface circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
KR930020906A true KR930020906A (en) | 1993-10-20 |
KR940010849B1 KR940010849B1 (en) | 1994-11-17 |
Family
ID=19330908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019920004988A KR940010849B1 (en) | 1992-03-26 | 1992-03-26 | Terminal interface circuit |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR940010849B1 (en) |
-
1992
- 1992-03-26 KR KR1019920004988A patent/KR940010849B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR940010849B1 (en) | 1994-11-17 |
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