DK134090C - - Google Patents
Info
- Publication number
- DK134090C DK134090C DK627271A DK627271A DK134090C DK 134090 C DK134090 C DK 134090C DK 627271 A DK627271 A DK 627271A DK 627271 A DK627271 A DK 627271A DK 134090 C DK134090 C DK 134090C
- Authority
- DK
- Denmark
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE17418/70A SE339704B (xx) | 1970-12-22 | 1970-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK134090B DK134090B (da) | 1976-09-06 |
| DK134090C true DK134090C (xx) | 1977-02-07 |
Family
ID=20303614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK627271AA DK134090B (da) | 1970-12-22 | 1971-12-21 | Forstærkerapparat til et telefonapparat. |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3745262A (xx) |
| CA (1) | CA941534A (xx) |
| CH (1) | CH543840A (xx) |
| DE (1) | DE2163126C3 (xx) |
| DK (1) | DK134090B (xx) |
| FR (1) | FR2119584A5 (xx) |
| GB (1) | GB1351328A (xx) |
| IT (1) | IT944168B (xx) |
| NO (1) | NO125753B (xx) |
| SE (1) | SE339704B (xx) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE365375B (xx) * | 1972-12-18 | 1974-03-18 | Ericsson Telefon Ab L M | |
| JPS5242643B2 (xx) * | 1973-10-18 | 1977-10-26 | ||
| JPS5411203B2 (xx) * | 1974-05-02 | 1979-05-12 | ||
| US4002852A (en) * | 1975-07-08 | 1977-01-11 | International Telephone And Telegraph Corporation | Electronic telephone network |
| DE2822069C2 (de) * | 1978-05-20 | 1986-02-20 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schaltungsanordnung für einen Abhörschutz bei sprachgesteuerten Freisprecheinrichtungen, insbesondere in Fernsprechapparaten |
| GB2285356B (en) * | 1993-12-28 | 1998-02-25 | Nec Corp | Reception volume limiting circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL267461A (xx) * | 1960-10-04 | 1900-01-01 | ||
| US3395255A (en) * | 1964-07-01 | 1968-07-30 | Bell Telephone Labor Inc | Loudspeaking telephone |
| SE311031B (xx) * | 1965-12-16 | 1969-05-27 | Ericsson Telefon Ab L M | |
| US3562791A (en) * | 1967-12-07 | 1971-02-09 | Int Standard Electric Corp | Loudspeaker telephone circuit arrangement |
-
1970
- 1970-12-22 SE SE17418/70A patent/SE339704B/xx unknown
-
1971
- 1971-12-01 US US00203599A patent/US3745262A/en not_active Expired - Lifetime
- 1971-12-14 DE DE2163126A patent/DE2163126C3/de not_active Expired
- 1971-12-17 CH CH1842571A patent/CH543840A/de not_active IP Right Cessation
- 1971-12-21 NO NO4765/71A patent/NO125753B/no unknown
- 1971-12-21 DK DK627271AA patent/DK134090B/da unknown
- 1971-12-21 GB GB5943771A patent/GB1351328A/en not_active Expired
- 1971-12-21 FR FR7146002A patent/FR2119584A5/fr not_active Expired
- 1971-12-21 IT IT32699/71A patent/IT944168B/it active
- 1971-12-22 CA CA130,859A patent/CA941534A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2163126B2 (de) | 1973-02-08 |
| IT944168B (it) | 1973-04-20 |
| CA941534A (en) | 1974-02-05 |
| GB1351328A (en) | 1974-04-24 |
| US3745262A (en) | 1973-07-10 |
| DE2163126A1 (de) | 1972-07-06 |
| SE339704B (xx) | 1971-10-18 |
| CH543840A (de) | 1973-10-31 |
| DE2163126C3 (de) | 1979-06-21 |
| NO125753B (xx) | 1972-10-23 |
| FR2119584A5 (xx) | 1972-08-04 |
| DK134090B (da) | 1976-09-06 |