KR930009318A - Zero cross detection circuit of ring signal - Google Patents
Zero cross detection circuit of ring signal Download PDFInfo
- Publication number
- KR930009318A KR930009318A KR1019910018850A KR910018850A KR930009318A KR 930009318 A KR930009318 A KR 930009318A KR 1019910018850 A KR1019910018850 A KR 1019910018850A KR 910018850 A KR910018850 A KR 910018850A KR 930009318 A KR930009318 A KR 930009318A
- Authority
- KR
- South Korea
- Prior art keywords
- resistor
- charge
- ring signal
- detection circuit
- diode
- Prior art date
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Abstract
링신호를 이용하는 통신 시스템에 있어서 상기 링 신호의 제로크로스점을 검출하는 회로에 관한 것이다. 정확한 링 제로 크로스점을 검출하여 교환기등의 중앙처리장치에 인가해 줌으로서 그 시점에서 링 전원 공급용 릴레이를 온/오프 시켜 릴레이 접점을 보호해 준다.A communication system using a ring signal relates to a circuit for detecting a zero cross point of the ring signal. By detecting the correct ring zero cross point and applying it to the central processing unit such as the exchanger, the relay relay is protected by turning on / off the ring power supply relay at that point.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제3도는 본 발명의 제로 크로스 검출 회로,3 is a zero cross detection circuit of the present invention,
제4도는 제3도의 비교기 입.출력과 제로 크로스 검출 파형도.4 is a comparator input / output and zero cross detection waveform diagram of FIG.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910018850A KR930009318A (en) | 1991-10-25 | 1991-10-25 | Zero cross detection circuit of ring signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910018850A KR930009318A (en) | 1991-10-25 | 1991-10-25 | Zero cross detection circuit of ring signal |
Publications (1)
Publication Number | Publication Date |
---|---|
KR930009318A true KR930009318A (en) | 1993-05-22 |
Family
ID=67348528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019910018850A KR930009318A (en) | 1991-10-25 | 1991-10-25 | Zero cross detection circuit of ring signal |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR930009318A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100475378B1 (en) * | 2000-10-17 | 2005-03-10 | 엘지전자 주식회사 | Control unit for ring relay of FXS |
-
1991
- 1991-10-25 KR KR1019910018850A patent/KR930009318A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100475378B1 (en) * | 2000-10-17 | 2005-03-10 | 엘지전자 주식회사 | Control unit for ring relay of FXS |
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Legal Events
Date | Code | Title | Description |
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WITN | Withdrawal due to no request for examination |