KR100255378B1 - 메시지대기링 발생회로 - Google Patents
메시지대기링 발생회로 Download PDFInfo
- Publication number
- KR100255378B1 KR100255378B1 KR1019970076028A KR19970076028A KR100255378B1 KR 100255378 B1 KR100255378 B1 KR 100255378B1 KR 1019970076028 A KR1019970076028 A KR 1019970076028A KR 19970076028 A KR19970076028 A KR 19970076028A KR 100255378 B1 KR100255378 B1 KR 100255378B1
- Authority
- KR
- South Korea
- Prior art keywords
- terminal
- ring
- message waiting
- transistor
- diode
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/02—Diodes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/04—Transistors
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
Description
Claims (3)
- 메시지대기링 발생회로에 있어서,링신호를 입력하기 위한 입력단과,메시지대기링을 출력하기 위한 출력단과;애노드단자와 캐소드단자를 구비하고 있으며, 상기 입력단에 상기 캐소드단자가 접속되어 상기 입력단으로 입력된 상기 링신호의 플러스성분을 제거시켜 상기 애노드단자로 출력하는 다이오드와;상기 다이오드의 애노드단자에 접속된 컬렉터단자와, 상기 출력단에 접속된 이미터단자와, 베이스단자를 구비하고 있으며 상기 이미터단자로 상기 메시지대기링을 출력하는 트랜지스터와;상기 다이오드의 애노드단자와 상기 트랜지스터의 베이스단자에 접속되는 저항과,상기 트랜지스터의 베이스단자에 애노드단자가 접속되며 접지단에 캐소드단자가 접속되는 제너다이오드를 적어도 포함하여 이루어짐을 특징으로 하는 회로.
- 제1항에 있어서, 상기 트랜지스터는 피엔피(PNP)형 트랜지스터임을 특징으로 하는 회로.
- 제1항 또는 제2항에 있어서, 상기 접지단과 상기 출력단의 사이에 접속되어 상기 메시지대기링을 안정화시켜 출력하는 캐패시터를 더 구비함을 특징으로 하는 회로.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970076028A KR100255378B1 (ko) | 1997-12-29 | 1997-12-29 | 메시지대기링 발생회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970076028A KR100255378B1 (ko) | 1997-12-29 | 1997-12-29 | 메시지대기링 발생회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR19990056052A KR19990056052A (ko) | 1999-07-15 |
KR100255378B1 true KR100255378B1 (ko) | 2000-05-01 |
Family
ID=19529168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019970076028A KR100255378B1 (ko) | 1997-12-29 | 1997-12-29 | 메시지대기링 발생회로 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100255378B1 (ko) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100438179B1 (ko) * | 2001-12-24 | 2004-07-01 | 엘지전자 주식회사 | 디씨 전압 발생 장치 및 디씨 전압 안정화 방법 |
-
1997
- 1997-12-29 KR KR1019970076028A patent/KR100255378B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR19990056052A (ko) | 1999-07-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4803719A (en) | Method for powering telephone apparatus and telephone apparatus powered directly from the telephone line without external power | |
EP0112119B1 (en) | Bridge rectifier circuit | |
DE69939845D1 (de) | Schaltungsanordnung | |
KR100663987B1 (ko) | 스위칭 전원 장치 | |
KR100255378B1 (ko) | 메시지대기링 발생회로 | |
US4648109A (en) | Light emitting diode message waiting lamp circuit | |
ID16431A (id) | Sirkuit pembatas arus | |
GB2182527A (en) | Telephone circuit | |
US6914980B2 (en) | Power switch device utilizing phone loop signals to control supply of electrical power to a telephony instrument | |
KR100194411B1 (ko) | 전화기의 다이얼러 동작을 위한 전원 공급회로 | |
KR970077033A (ko) | Crt 보호 장치 | |
KR940001493Y1 (ko) | 분기된 전화기를 이용한 멜로디홀드 자동 해제회로 | |
JP3047992U (ja) | 呼出音発生装置 | |
DE69531720D1 (de) | Rufgeneratorschaltung | |
KR19990023907A (ko) | 전원 공급 어댑터 회로 | |
KR0136483Y1 (ko) | 스탠바이 회로 | |
JP2538227Y2 (ja) | 電話着信報知用電源供給回路 | |
KR200181634Y1 (ko) | 휴대 전화 단말 장치의 전력단 전류 소모 감소 장치 | |
KR100251693B1 (ko) | 피시엠 단국장치에서 이엔엠 시그날링 검출 및 송출회로 | |
KR200176773Y1 (ko) | 보류음자동해제회로 | |
KR940002727Y1 (ko) | 전화기의 전원공급회로 | |
KR100232725B1 (ko) | 키폰시스템에서 루프 다이얼링회로 | |
KR100255377B1 (ko) | 교환기의 가입자부에서 왜곡방지장치 | |
KR100259050B1 (ko) | 교환시스템의 링공급 장치 | |
JPH01245639A (ja) | ラストナンバリダイヤルメモリ消去機能付電話機 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19971229 |
|
PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 19971229 Comment text: Request for Examination of Application |
|
PG1501 | Laying open of application | ||
E701 | Decision to grant or registration of patent right | ||
PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 20000117 |
|
GRNT | Written decision to grant | ||
PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 20000212 Patent event code: PR07011E01D |
|
PR1002 | Payment of registration fee |
Payment date: 20000214 End annual number: 3 Start annual number: 1 |
|
PG1601 | Publication of registration | ||
PR1001 | Payment of annual fee |
Payment date: 20030124 Start annual number: 4 End annual number: 4 |
|
PR1001 | Payment of annual fee |
Payment date: 20040119 Start annual number: 5 End annual number: 5 |
|
PR1001 | Payment of annual fee |
Payment date: 20050124 Start annual number: 6 End annual number: 6 |
|
PR1001 | Payment of annual fee |
Payment date: 20060119 Start annual number: 7 End annual number: 7 |
|
PR1001 | Payment of annual fee |
Payment date: 20070115 Start annual number: 8 End annual number: 8 |
|
PR1001 | Payment of annual fee |
Payment date: 20080108 Start annual number: 9 End annual number: 9 |
|
PR1001 | Payment of annual fee |
Payment date: 20090121 Start annual number: 10 End annual number: 10 |
|
PR1001 | Payment of annual fee |
Payment date: 20100128 Start annual number: 11 End annual number: 11 |
|
PR1001 | Payment of annual fee |
Payment date: 20110128 Start annual number: 12 End annual number: 12 |
|
PR1001 | Payment of annual fee |
Payment date: 20120130 Start annual number: 13 End annual number: 13 |
|
FPAY | Annual fee payment |
Payment date: 20130130 Year of fee payment: 14 |
|
PR1001 | Payment of annual fee |
Payment date: 20130130 Start annual number: 14 End annual number: 14 |
|
FPAY | Annual fee payment |
Payment date: 20140128 Year of fee payment: 15 |
|
PR1001 | Payment of annual fee |
Payment date: 20140128 Start annual number: 15 End annual number: 15 |
|
FPAY | Annual fee payment |
Payment date: 20150129 Year of fee payment: 16 |
|
PR1001 | Payment of annual fee |
Payment date: 20150129 Start annual number: 16 End annual number: 16 |
|
FPAY | Annual fee payment |
Payment date: 20160128 Year of fee payment: 17 |
|
PR1001 | Payment of annual fee |
Payment date: 20160128 Start annual number: 17 End annual number: 17 |
|
LAPS | Lapse due to unpaid annual fee | ||
PC1903 | Unpaid annual fee |
Termination category: Default of registration fee Termination date: 20171123 |