GB304631A - Improvements in or relating to thermionic valve negative resistance devices and the like - Google Patents
Improvements in or relating to thermionic valve negative resistance devices and the likeInfo
- Publication number
- GB304631A GB304631A GB2793627A GB2793627A GB304631A GB 304631 A GB304631 A GB 304631A GB 2793627 A GB2793627 A GB 2793627A GB 2793627 A GB2793627 A GB 2793627A GB 304631 A GB304631 A GB 304631A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- circuit
- anode
- aerial
- coupling
- 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
- 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
- H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers
Abstract
304,631. Smith, W. S., and Mc- Lachlan, N. W. Oct. 20, 1927. Thermionic valve circuits.-The damping of an oscillatory circuit in a wireless receiver or the like is reduced by a negative - resistance device comprising a screened-grid valve. As shown in Fig. 2, the damping of an aerial circuit is reduced by variably coupling it to a tuned circuit 6, 7 connected between the anode and filament of a screen-grid valve 1. The inner grid 4 is maintained at a suitable low voltage, and the outer grid 3 has a higher voltage than the anode. An auxiliary screening-grid may be interposed between the screen-grid 3 and the anode. The degree of negative resistance applied to the aerial may be varied by adjusting its coupling to the circuit 6, 7, or by inserting a variable resistance in series or in shunt to the oscillatory circuit, or by varying the voltages of the electrodes. In a modification, a reaction coupling is provided between the aerial circuit and a tuned circuit connected to the inner grid 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2793627A GB304631A (en) | 1927-10-20 | 1927-10-20 | Improvements in or relating to thermionic valve negative resistance devices and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2793627A GB304631A (en) | 1927-10-20 | 1927-10-20 | Improvements in or relating to thermionic valve negative resistance devices and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB304631A true GB304631A (en) | 1929-01-21 |
Family
ID=10267662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2793627A Expired GB304631A (en) | 1927-10-20 | 1927-10-20 | Improvements in or relating to thermionic valve negative resistance devices and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB304631A (en) |
-
1927
- 1927-10-20 GB GB2793627A patent/GB304631A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB603437A (en) | Improvements in or relating to frequency discriminator circuits | |
| GB304631A (en) | Improvements in or relating to thermionic valve negative resistance devices and the like | |
| GB516647A (en) | Improvements in or relating to automatic frequency control circuits for superheterodyne wireless receivers | |
| GB557083A (en) | Improvements in and relating to means for reducing noise in radio receivers | |
| GB307177A (en) | Improvements in or relating to wireless receiving systems | |
| GB428285A (en) | Improvements in or relating to thermionic valve and like circuit arrangements | |
| GB413724A (en) | Improvements in or relating to superheterodyne wireless receiving sets | |
| GB271915A (en) | Improved system for controlling self-oscillation in radio apparatus | |
| GB447593A (en) | Improvements in and relating to means for avoiding disturbances in the reception of electric oscillations | |
| GB314534A (en) | Improvements in or relating to radio and the like valve transmitters | |
| GB608855A (en) | Improvements in and relating to mixer circuits; for example for superheterodyne receivers | |
| GB217259A (en) | Improvements in receiving apparatus for wireless telegraphy and telephony | |
| GB172127A (en) | Improvements in and relating to valve transmitters and receivers for wireless telegraphy and telephony | |
| GB289999A (en) | Improvements in or relating to wireless transmitting apparatus | |
| GB450136A (en) | Improvements in variable thermionic impedances | |
| GB382881A (en) | Improvements in or relating to super-regenerative receivers | |
| GB434638A (en) | Improvements in and relating to short wave radio communication | |
| GB306003A (en) | Improvements in or relating to electric circuit coupling devices suitable for use with thermionic valves and the like | |
| GB236156A (en) | Improvements in radio receiving apparatus | |
| GB515762A (en) | Improvements in or relating to high frequency amplifier arrangements | |
| GB424602A (en) | Method of, and apparatus for, amplifying and rectifying high frequency oscillations | |
| GB293926A (en) | Improvements in or relating to radio apparatus | |
| GB166260A (en) | Electron discharge devices especially for use in wireless communication | |
| GB220727A (en) | Improvements in or relating to thermionic valve arrangements | |
| GB291493A (en) | Improvements in or relating to wireless receiving apparatus |