JPH10513628A - 有線通信用端末 - Google Patents
有線通信用端末Info
- Publication number
- JPH10513628A JPH10513628A JP9520315A JP52031597A JPH10513628A JP H10513628 A JPH10513628 A JP H10513628A JP 9520315 A JP9520315 A JP 9520315A JP 52031597 A JP52031597 A JP 52031597A JP H10513628 A JPH10513628 A JP H10513628A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- terminal
- voltage
- class
- signal
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
-
- 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
-
- 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
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.有線通信用端末(1)であって、この端末(1)は該端末(1)を接続しう る通信線(2)によって給電される増幅器(20)を有し、この端末(1)は、 呼出し状態で通信線(2)から到来する呼出し電圧(Vring)を用いて増幅器( 20)に給電するとともに、オフフック状態で通信線(2)から到来する線間電 圧(Vln)を用いて増幅器(20)に給電するように構成されている、当該端末 において、 前記増幅器(20)はD級増幅器であることを特徴とする端末。 2.請求の範囲1に記載の端末(1)において、D級増幅器(20)の出力端( 203)及び入力端(202)間で帰還が行われるようになっていることを特徴 とする端末。 3.請求の範囲1又は2に記載の端末(1)において、この端末(1)は、D級 増幅器(20)により増幅すべき呼出しメロディー(Sring)を形成するDTM F音を発生する信号発生器(11)を有していることを特徴とする端末。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95203286 | 1995-11-29 | ||
NL95203286.0 | 1995-11-29 | ||
PCT/IB1996/001250 WO1997020426A1 (en) | 1995-11-29 | 1996-11-19 | Terminal for wirebound telecommunication |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10513628A true JPH10513628A (ja) | 1998-12-22 |
JP4459305B2 JP4459305B2 (ja) | 2010-04-28 |
Family
ID=8220886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52031597A Expired - Lifetime JP4459305B2 (ja) | 1995-11-29 | 1996-11-19 | 有線通信用端末 |
Country Status (6)
Country | Link |
---|---|
US (1) | US5848147A (ja) |
EP (1) | EP0806106B1 (ja) |
JP (1) | JP4459305B2 (ja) |
KR (1) | KR100411533B1 (ja) |
DE (1) | DE69634722T2 (ja) |
WO (1) | WO1997020426A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7437298B2 (en) | 2003-03-31 | 2008-10-14 | Ricoh Company, Ltd. | Method and apparatus for mobile phone using semiconductor device capable of inter-processing voice signal and audio signal |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6400821B1 (en) * | 1998-05-29 | 2002-06-04 | Motorola, Inc. | Digital tone generator |
US9179010B2 (en) | 2007-05-02 | 2015-11-03 | British Telecommunications Public Limited Company | Remote powered node |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4233474A (en) * | 1978-01-10 | 1980-11-11 | Nippon Electric Co., Ltd. | Telephone transmitter amplifier |
CH668521A5 (de) * | 1983-10-18 | 1988-12-30 | Siemens Ag Albis | Schaltungsanordnung fuer einen fernsprechapparat. |
GB2163320B (en) * | 1984-08-14 | 1988-01-27 | Stc Plc | Telephone circuit |
GB2183964B (en) * | 1985-11-28 | 1989-10-11 | Stc Plc | Telephone power supply |
US4856055A (en) * | 1988-07-25 | 1989-08-08 | Nira Schwartz | Controllable telephone annunciator |
FR2650138B1 (fr) * | 1989-07-18 | 1991-09-20 | Alcatel Business Systems | Poste telephonique a prise de ligne sans decrochage |
DE4123763C2 (de) * | 1991-07-18 | 2000-01-20 | Bosch Gmbh Robert | Verfahren zur Einstellung der Lautstärke bei Fernsprech-Endgeräten |
US5118997A (en) * | 1991-08-16 | 1992-06-02 | General Electric Company | Dual feedback control for a high-efficiency class-d power amplifier circuit |
DE4211819C2 (de) * | 1992-04-04 | 1996-03-21 | Deutsche Telephonwerk Kabel | Schaltungsanordnung für Kommunikations-Endgeräte |
US5410592A (en) * | 1993-06-04 | 1995-04-25 | Harris Corporation | Class `D` audio speaker amplifier circuit with state variable feedback control |
US5672998A (en) * | 1995-08-09 | 1997-09-30 | Harris Corporation | Class D amplifier and method |
-
1996
- 1996-11-19 DE DE69634722T patent/DE69634722T2/de not_active Expired - Lifetime
- 1996-11-19 EP EP96935283A patent/EP0806106B1/en not_active Expired - Lifetime
- 1996-11-19 JP JP52031597A patent/JP4459305B2/ja not_active Expired - Lifetime
- 1996-11-19 KR KR1019970705217A patent/KR100411533B1/ko not_active IP Right Cessation
- 1996-11-19 WO PCT/IB1996/001250 patent/WO1997020426A1/en active IP Right Grant
- 1996-11-26 US US08/753,555 patent/US5848147A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7437298B2 (en) | 2003-03-31 | 2008-10-14 | Ricoh Company, Ltd. | Method and apparatus for mobile phone using semiconductor device capable of inter-processing voice signal and audio signal |
Also Published As
Publication number | Publication date |
---|---|
KR100411533B1 (ko) | 2004-04-03 |
WO1997020426A1 (en) | 1997-06-05 |
JP4459305B2 (ja) | 2010-04-28 |
DE69634722T2 (de) | 2006-01-19 |
EP0806106A1 (en) | 1997-11-12 |
DE69634722D1 (de) | 2005-06-16 |
US5848147A (en) | 1998-12-08 |
KR19980701820A (ko) | 1998-06-25 |
EP0806106B1 (en) | 2005-05-11 |
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