NL68241C - - Google Patents
Info
- Publication number
- NL68241C NL68241C NL68241DA NL68241C NL 68241 C NL68241 C NL 68241C NL 68241D A NL68241D A NL 68241DA NL 68241 C NL68241 C NL 68241C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1607—Supply circuits
- H04B1/1623—Supply circuits using tubes
-
- 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
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
- H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
- H03G3/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US371498A US2342822A (en) | 1940-12-24 | 1940-12-24 | Amplifying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL68241C true NL68241C (fr) |
Family
ID=23464205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL68241D NL68241C (fr) | 1940-12-24 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2342822A (fr) |
| BE (1) | BE471331A (fr) |
| FR (1) | FR942174A (fr) |
| GB (1) | GB552331A (fr) |
| NL (1) | NL68241C (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481533A (en) * | 1944-06-06 | 1949-09-13 | Rca Corp | Audio amplifier circuits for radio transmitters |
| US2710721A (en) * | 1945-11-27 | 1955-06-14 | Amasa S Bishop | Electronic dividing circuit |
| US2541811A (en) * | 1947-10-10 | 1951-02-13 | Joseph W Crownover | Hearing aid amplifier |
| US2761918A (en) * | 1952-11-19 | 1956-09-04 | Dictograph Products Co Inc | Amplifier with gain control and power control |
| US8085954B2 (en) | 2005-07-21 | 2011-12-27 | Freescale Semiconductor, Inc. | Microphone amplification arrangement and integrated circuit therefor |
-
0
- NL NL68241D patent/NL68241C/xx active
- BE BE471331D patent/BE471331A/xx unknown
-
1940
- 1940-12-24 US US371498A patent/US2342822A/en not_active Expired - Lifetime
-
1941
- 1941-12-15 GB GB16139/41A patent/GB552331A/en not_active Expired
-
1947
- 1947-02-03 FR FR942174D patent/FR942174A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2342822A (en) | 1944-02-29 |
| FR942174A (fr) | 1949-02-01 |
| GB552331A (en) | 1943-04-01 |
| BE471331A (fr) |