BE441654A - - Google Patents
Info
- Publication number
- BE441654A BE441654A BE441654DA BE441654A BE 441654 A BE441654 A BE 441654A BE 441654D A BE441654D A BE 441654DA BE 441654 A BE441654 A BE 441654A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US327045A US2328478A (en) | 1940-03-30 | 1940-03-30 | Piezoelectric transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE441654A true BE441654A (enrdf_load_html_response) |
Family
ID=23274890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE441654D BE441654A (enrdf_load_html_response) | 1940-03-30 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2328478A (enrdf_load_html_response) |
| BE (1) | BE441654A (enrdf_load_html_response) |
| FR (1) | FR867852A (enrdf_load_html_response) |
| GB (1) | GB546182A (enrdf_load_html_response) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2594841A (en) * | 1945-08-11 | 1952-04-29 | Brush Dev Co | Piezoelectric transducer with pushpull and feedback circuit |
| US2635033A (en) * | 1947-08-05 | 1953-04-14 | Paul M Higgs | Recorder for use in missiles |
| US2549550A (en) * | 1948-08-19 | 1951-04-17 | Bell Telephone Labor Inc | Vibration-operated transistor |
| US2697757A (en) * | 1951-02-17 | 1954-12-21 | Pfanstiehl Chemical Corp | Preamplifier |
| US2722569A (en) * | 1951-04-12 | 1955-11-01 | Socony Mobil Oil Co Inc | Reproduction of low-frequency magnetically recorded signals |
| US2649507A (en) * | 1951-08-28 | 1953-08-18 | Paramount Pictures Corp | Crystal light valve for sound-on-film recording |
| US3001031A (en) * | 1954-11-18 | 1961-09-19 | Astatic Corp | Self-supporting electro-mechanical transducer assembly |
| NL104447C (enrdf_load_html_response) * | 1957-10-29 | |||
| NL233135A (enrdf_load_html_response) * | 1957-11-13 |
-
0
- BE BE441654D patent/BE441654A/xx unknown
-
1940
- 1940-03-30 US US327045A patent/US2328478A/en not_active Expired - Lifetime
- 1940-11-29 FR FR867852D patent/FR867852A/fr not_active Expired
-
1941
- 1941-01-27 GB GB1056/41A patent/GB546182A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR867852A (fr) | 1941-12-02 |
| US2328478A (en) | 1943-08-31 |
| GB546182A (en) | 1942-07-01 |