KR820001673B1 - 음성 스위칭 회로 - Google Patents
음성 스위칭 회로 Download PDFInfo
- Publication number
- KR820001673B1 KR820001673B1 KR1019810000892A KR810000892A KR820001673B1 KR 820001673 B1 KR820001673 B1 KR 820001673B1 KR 1019810000892 A KR1019810000892 A KR 1019810000892A KR 810000892 A KR810000892 A KR 810000892A KR 820001673 B1 KR820001673 B1 KR 820001673B1
- Authority
- KR
- South Korea
- Prior art keywords
- amplifier
- variable gain
- comparator
- transmission
- voice
- 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.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
Description
Claims (1)
- 송화갑(10), 수화갑(20), 음성 스위칭회로(40), 그리고 하이브리드(30)등으로 구성된 스피커폰에 있어서, 송신용 가변이득 증폭기(48)의 가변 이득 제어단자에 증폭기(47)를 접속하고, 이 증폭기(47)의 1입력에는 순차적으로 시정회로(46), 비교기 (43) 및 정류기(42)(44)를 연결하고 그 타입력에는 가변저항기(49)를 연결하며, 수신용 가변이득 증폭기(57)의 가변이득 제어단자에는 인버터(56)를 연결하고, 이 인버터(56)의 1입력에는 순차적으로 시정수회로(46), 비교기(50) 및 정류기 (52)(53)를 연결하고 그 타입력에는 가변저항기(55)를 연결하여 구성된 음성스위칭회로.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019810000892A KR820001673B1 (ko) | 1981-03-18 | 1981-03-18 | 음성 스위칭 회로 |
CA000396221A CA1186826A (en) | 1981-03-18 | 1982-02-12 | Loudspeaker telephone system |
JP57022947A JPS5817755A (ja) | 1981-03-18 | 1982-02-17 | スピ−カ電話方式 |
GB8207037A GB2096434B (en) | 1981-03-18 | 1982-03-10 | Loudspeaking telephone system |
IT20160/82A IT1150308B (it) | 1981-03-18 | 1982-03-15 | Perfezionamenti per apparecchi telefonici muniti di trasduttori ausiliari per consentire le conversazioni a viva voce |
US06/358,965 US4507524A (en) | 1981-03-18 | 1982-03-17 | Loudspeaker telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019810000892A KR820001673B1 (ko) | 1981-03-18 | 1981-03-18 | 음성 스위칭 회로 |
Publications (1)
Publication Number | Publication Date |
---|---|
KR820001673B1 true KR820001673B1 (ko) | 1982-09-15 |
Family
ID=19220472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019810000892A Expired KR820001673B1 (ko) | 1981-03-18 | 1981-03-18 | 음성 스위칭 회로 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5817755A (ko) |
KR (1) | KR820001673B1 (ko) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59153472A (ja) * | 1983-02-19 | 1984-09-01 | Ikeda Denki Kk | インバ−タ電源装置の出力電圧変動防止装置 |
JPS60182249A (ja) * | 1984-02-29 | 1985-09-17 | Nippon Telegr & Teleph Corp <Ntt> | 通話路利得制御方法 |
FI73341C (fi) * | 1985-08-06 | 1987-09-10 | Outel Oy | Mellanfoerstaerkare som anvaends i tvaoledningsfoerbindelser i ett valbart telefonnaet samt foerfarande foer reglering av dess foerstaerkning. |
KR101513209B1 (ko) | 2013-11-08 | 2015-04-17 | 엘에스산전 주식회사 | 배선용 차단기 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3963876A (en) * | 1975-06-30 | 1976-06-15 | Bell Telephone Laboratories, Incorporated | Amplifier circuit for increasing transmit and receive levels in a telephone hybrid network |
JPS5317361A (en) * | 1976-07-31 | 1978-02-17 | Japan National Railway | Automatic date and time printer for trackkinspecting car |
JPS5392607A (en) * | 1977-01-25 | 1978-08-14 | Nippon Telegr & Teleph Corp <Ntt> | Voice switch circuit |
JPS53114305A (en) * | 1977-03-16 | 1978-10-05 | Nitsuko Ltd | Loudspeaking telephone set |
-
1981
- 1981-03-18 KR KR1019810000892A patent/KR820001673B1/ko not_active Expired
-
1982
- 1982-02-17 JP JP57022947A patent/JPS5817755A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS5817755A (ja) | 1983-02-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19810318 |
|
PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 19820210 Patent event code: PE09021S01D |
|
PG1605 | Publication of application before grant of patent |
Comment text: Decision on Publication of Application Patent event code: PG16051S01I Patent event date: 19820817 |
|
O132 | Decision on opposition [patent] | ||
PO1301 | Decision on opposition |
Comment text: Decision on Opposition Patent event date: 19831021 Patent event code: PO13011S01D |
|
GRNT | Written decision to grant | ||
PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 19831102 Patent event code: PR07011E01D |
|
PR1002 | Payment of registration fee |
Payment date: 19831102 End annual number: 3 Start annual number: 1 |
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PR1001 | Payment of annual fee |
Payment date: 19850910 Start annual number: 4 End annual number: 4 |
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PR1001 | Payment of annual fee |
Payment date: 19851224 Start annual number: 5 End annual number: 5 |
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PR1001 | Payment of annual fee |
Payment date: 19870624 Start annual number: 6 End annual number: 6 |
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PR1001 | Payment of annual fee |
Payment date: 19871230 Start annual number: 7 End annual number: 7 |
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PR1001 | Payment of annual fee |
Payment date: 19890123 Start annual number: 8 End annual number: 8 |
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PR1001 | Payment of annual fee |
Payment date: 19900117 Start annual number: 9 End annual number: 9 |
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PR1001 | Payment of annual fee |
Payment date: 19910103 Start annual number: 10 End annual number: 10 |
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FPAY | Annual fee payment |
Payment date: 19911223 Year of fee payment: 11 |
|
PR1001 | Payment of annual fee |
Payment date: 19911223 Start annual number: 11 End annual number: 11 |
|
LAPS | Lapse due to unpaid annual fee | ||
PC1903 | Unpaid annual fee |
Termination category: Default of registration fee Termination date: 19941008 |