KR910010952A - Volume control circuit of telephone ring signal - Google Patents
Volume control circuit of telephone ring signal Download PDFInfo
- Publication number
- KR910010952A KR910010952A KR1019890017313A KR890017313A KR910010952A KR 910010952 A KR910010952 A KR 910010952A KR 1019890017313 A KR1019890017313 A KR 1019890017313A KR 890017313 A KR890017313 A KR 890017313A KR 910010952 A KR910010952 A KR 910010952A
- Authority
- KR
- South Korea
- Prior art keywords
- volume control
- ring signal
- control circuit
- telephone ring
- resistor
- 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)
- Control Of Amplification And Gain Control (AREA)
Abstract
내용 없음No content
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
제1도는 본 발명의 회로도.1 is a circuit diagram of the present invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019890017313A KR940008109B1 (en) | 1989-11-28 | 1989-11-28 | Telephone ringing control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019890017313A KR940008109B1 (en) | 1989-11-28 | 1989-11-28 | Telephone ringing control circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
KR910010952A true KR910010952A (en) | 1991-06-29 |
KR940008109B1 KR940008109B1 (en) | 1994-09-02 |
Family
ID=19292155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019890017313A KR940008109B1 (en) | 1989-11-28 | 1989-11-28 | Telephone ringing control circuit |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR940008109B1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10223895B2 (en) | 2010-04-07 | 2019-03-05 | Clean Hands Safe Hands Llc | Systems for monitoring hand sanitization |
US10467884B2 (en) | 2010-04-07 | 2019-11-05 | Clean Hands Safe Hands Llc | Systems for monitoring hand sanitization |
US10540881B2 (en) | 2010-04-07 | 2020-01-21 | Clean Hands Safe Hands Llc | Systems and methods for pattern recognition and individual detection |
US9123233B2 (en) | 2010-04-07 | 2015-09-01 | Clean Hands Safe Hands | Systems for monitoring hand sanitization |
US10282969B2 (en) | 2013-06-19 | 2019-05-07 | Clean Hands Safe Hands | System and methods for wireless hand hygiene monitoring |
-
1989
- 1989-11-28 KR KR1019890017313A patent/KR940008109B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR940008109B1 (en) | 1994-09-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR880001154A (en) | Remote control system | |
KR880009516A (en) | Luminance signal forming circuit | |
KR890001293A (en) | Output circuit | |
KR910010952A (en) | Volume control circuit of telephone ring signal | |
KR910005574A (en) | Constant voltage circuit | |
KR830006990A (en) | Constant current circuit | |
KR910019357A (en) | Portable Transceiver with Low Voltage Operation Integrated Circuit | |
KR880002319A (en) | Gain control amplifier | |
KR920003659A (en) | Low Noise Output Buffer Circuit | |
KR900004094A (en) | Current output comparison device | |
KR890011076A (en) | Telephone semiconductor integrated circuit | |
KR920005460A (en) | Amplification circuit | |
KR920014205A (en) | Specific Date Alarm Circuit | |
KR890015602A (en) | Magnetic recording device | |
KR950022580A (en) | Selective call circuit of answering machine | |
KR910015917A (en) | Talking computer | |
KR880002347A (en) | Phone with Speed Dial Function | |
KR890011170A (en) | Bicy MOS inverter circuit | |
KR880009482A (en) | Output circuit in solid state imaging device | |
KR900002657A (en) | Wireless Headphones (HEAD phoNE) | |
KR880006866A (en) | Ringer auto increment circuit of telephone | |
KR890016803A (en) | One-button telephone | |
KR900016930A (en) | Alarm device using wireless call function of telephone communication network | |
KR920022693A (en) | Dial pulse generator circuit | |
KR910010991A (en) | Photo device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20000901 Year of fee payment: 7 |
|
LAPS | Lapse due to unpaid annual fee |