BE420493A - - Google Patents
Info
- Publication number
- BE420493A BE420493A BE420493DA BE420493A BE 420493 A BE420493 A BE 420493A BE 420493D A BE420493D A BE 420493DA BE 420493 A BE420493 A BE 420493A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
- H03H11/1291—Current or voltage controlled filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/18—Automatic control in untuned amplifiers
- H03G5/20—Automatic control in untuned amplifiers having discharge tubes
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US645343XA | 1946-01-17 | 1946-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE420493A true BE420493A (cs) |
Family
ID=22056633
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE470828D BE470828A (cs) | 1946-01-17 | ||
| BE420493D BE420493A (cs) | 1946-01-17 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE470828D BE470828A (cs) | 1946-01-17 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2606973A (cs) |
| BE (2) | BE420493A (cs) |
| GB (2) | GB645343A (cs) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2774043A (en) * | 1953-03-03 | 1956-12-11 | Jr Oswald G Villard | Frequency selective apparatus |
| US2852750A (en) * | 1955-02-25 | 1958-09-16 | Rca Corp | Delay line |
| US3182271A (en) * | 1960-12-15 | 1965-05-04 | Aiken William Ross | Tone control circuit for emphasizing low volume high and low frequency signals |
| JPS499371B1 (cs) * | 1968-07-19 | 1974-03-04 | ||
| US3688010A (en) * | 1970-06-11 | 1972-08-29 | Alfred B Freeman | Tone modulation system |
| US3678416A (en) * | 1971-07-26 | 1972-07-18 | Richard S Burwen | Dynamic noise filter having means for varying cutoff point |
| US4014237A (en) * | 1972-03-01 | 1977-03-29 | Milde Karl F Jr | Musical note detecting apparatus |
| US4584880A (en) * | 1984-06-04 | 1986-04-29 | Dymax Corporation | Tissue signature tracking tranceiver |
| US4809338A (en) * | 1985-07-05 | 1989-02-28 | Harman International Industries, Incorporated | Automotive sound system |
| US4759065A (en) * | 1986-09-22 | 1988-07-19 | Harman International Industries, Incorporated | Automotive sound system |
| US5471527A (en) * | 1993-12-02 | 1995-11-28 | Dsc Communications Corporation | Voice enhancement system and method |
| US8712076B2 (en) | 2012-02-08 | 2014-04-29 | Dolby Laboratories Licensing Corporation | Post-processing including median filtering of noise suppression gains |
| US9173025B2 (en) | 2012-02-08 | 2015-10-27 | Dolby Laboratories Licensing Corporation | Combined suppression of noise, echo, and out-of-location signals |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1947822A (en) * | 1931-04-15 | 1934-02-20 | Rca Corp | Automatic tone control |
| US1950759A (en) * | 1931-05-25 | 1934-03-13 | Frederick E Terman | Variable reactance circuit |
| US2017270A (en) * | 1932-10-19 | 1935-10-15 | Rca Corp | Electronic tone control |
| US2002216A (en) * | 1933-06-07 | 1935-05-21 | Bell Telephone Labor Inc | Wave filter |
| US2072708A (en) * | 1934-08-04 | 1937-03-02 | Hazeltine Corp | Amplification control |
| US2053841A (en) * | 1935-08-05 | 1936-09-08 | Continental Oil Co | Method and apparatus for making geophysical explorations |
| US2148030A (en) * | 1936-07-25 | 1939-02-21 | Rca Corp | Automatic tone control system |
| US2263683A (en) * | 1936-08-28 | 1941-11-25 | Crosley Corp | Expander and limiter circuits |
| US2369952A (en) * | 1943-10-23 | 1945-02-20 | Gen Electric | Background noise suppressor |
-
0
- BE BE470828D patent/BE470828A/xx unknown
- BE BE420493D patent/BE420493A/xx unknown
-
1946
- 1946-02-09 US US646620A patent/US2606973A/en not_active Expired - Lifetime
-
1947
- 1947-01-01 GB GB97/47A patent/GB645343A/en not_active Expired
- 1947-01-07 GB GB545/47A patent/GB643662A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE470828A (cs) | |
| GB645343A (en) | 1950-11-01 |
| GB643662A (en) | 1950-09-27 |
| US2606973A (en) | 1952-08-12 |