GB343869A - Improvements in means for the elimination of ripples in cascade coupled thermionic valves - Google Patents
Improvements in means for the elimination of ripples in cascade coupled thermionic valvesInfo
- Publication number
- GB343869A GB343869A GB23021/30A GB2302130A GB343869A GB 343869 A GB343869 A GB 343869A GB 23021/30 A GB23021/30 A GB 23021/30A GB 2302130 A GB2302130 A GB 2302130A GB 343869 A GB343869 A GB 343869A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- elimination
- thermionic valves
- ripples
- hum
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/005—Reducing noise, e.g. humm, from the supply
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
343,869. Valve amplifying and detecting circuits. TELEFONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. July 30, 1930, No. 23021. Convention date, Aug. 3, 1929. Addition to 309,902, [Class 40 (v), Wireless signalling &c.]. [Class 40 (v).] A number of thermionic valves V1, V2 coupled by transformers T are supplied with plate voltage, filament current, and grid bias, from a potentiometer 0 .. 6 connected across a D.C. source as in the parent Specification, and the elimination of hum or ripple is facilitated .by connecting a high resistance R between a high positive voltage point 6 on the potentiometer and the plate of a valve V1, other than the last valve V2. With a resistance R of suitable value in circuit, it is possible to adjust the slider X to a point where hum is eliminated, without giving the grid of valve V1 too heavy a negative bias.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE343869X | 1929-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB343869A true GB343869A (en) | 1931-02-26 |
Family
ID=20308446
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23644/28A Expired GB309902A (en) | 1929-08-03 | 1928-08-16 | Improved means for operating wireless sets from supply mains or machine generators |
| GB23021/30A Expired GB343869A (en) | 1929-08-03 | 1930-07-30 | Improvements in means for the elimination of ripples in cascade coupled thermionic valves |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23644/28A Expired GB309902A (en) | 1929-08-03 | 1928-08-16 | Improved means for operating wireless sets from supply mains or machine generators |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1923222A (en) |
| FR (2) | FR660716A (en) |
| GB (2) | GB309902A (en) |
-
1928
- 1928-08-06 FR FR660716D patent/FR660716A/en not_active Expired
- 1928-08-16 GB GB23644/28A patent/GB309902A/en not_active Expired
-
1930
- 1930-07-26 FR FR38903D patent/FR38903E/en not_active Expired
- 1930-07-28 US US471295A patent/US1923222A/en not_active Expired - Lifetime
- 1930-07-30 GB GB23021/30A patent/GB343869A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB309902A (en) | 1929-11-07 |
| US1923222A (en) | 1933-08-22 |
| FR660716A (en) | 1929-07-16 |
| FR38903E (en) | 1931-08-07 |
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