GB631177A - Amplification devices for amplifying variable width pass bands in radio electrical apparatus - Google Patents
Amplification devices for amplifying variable width pass bands in radio electrical apparatusInfo
- Publication number
- GB631177A GB631177A GB25725/46A GB2572546A GB631177A GB 631177 A GB631177 A GB 631177A GB 25725/46 A GB25725/46 A GB 25725/46A GB 2572546 A GB2572546 A GB 2572546A GB 631177 A GB631177 A GB 631177A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- stage
- receiver
- frequency
- resonant
- 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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/42—Modifications of amplifiers to extend the bandwidth
- H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
- H03F1/50—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with tubes only
-
- 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
- H04B1/26—Circuits for superheterodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
631,177. Valve circuits. HATTE, P. L. M. Aug. 28, 1946, No. 25725. Convention date, Oct. 11, 1944. [Classes 40 (v) and 40 (vi)] A H.F. amplifier comprising a high Q resonant circuit is given an effective wideband characteristic by continuously varying the point of resonance on either side of the mid-band position at a very high frequency. The Figure shows the application to the I.F. amplifier of a superheterodyne receiver. The incoming signals at antenna 1 are amplified in stage 2 and converted to the intermediate frequency in stage 3 the resonant frequency of this stage being determined by the high Q circuit comprising inductor 5 tuned by capacitor 6 in parallel with the input capacities of valves 9 and 7. Valve 9 is an I.F. amplifier stage beyond which point the circuit of the receiver may be conventional. The input capacity of valve 7 is varied continuously and very rapidly over a range by varying the suppressor grid potential by oscillator 12 so that the resonant point of the I.F. amplifier is rapidly varied over a considerable frequency range and the amplifier is thus given an effective wide-band characteristic, the band width of which may be varied by adjustment of the output amplitude of oscillator 12. An H.F. amplifier of this type may be used in a super-regenerative receiver in conjunction with a, number of normal amplifying stages the receiver tending to oscillate when the resonant frequency of the controlled stage passes through the resonant frequency which is common to the other stages. A wideband amplifier of this type may also be used for H.F. amplification in a television transmitter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR631177X | 1944-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB631177A true GB631177A (en) | 1949-10-28 |
Family
ID=8991594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25725/46A Expired GB631177A (en) | 1944-10-11 | 1946-08-28 | Amplification devices for amplifying variable width pass bands in radio electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB631177A (en) |
-
1946
- 1946-08-28 GB GB25725/46A patent/GB631177A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB713674A (en) | Improvements in frequency converters | |
| US2281661A (en) | Tuning system | |
| GB631177A (en) | Amplification devices for amplifying variable width pass bands in radio electrical apparatus | |
| GB548539A (en) | Wide-band coupling circuits | |
| US2120998A (en) | Coupled circuits | |
| US2570016A (en) | Superheterodyne receiving circuit arrangement | |
| GB887615A (en) | Improvements in or relating to radio frequency reactance amplifiers | |
| GB702310A (en) | Improvements in wide-band amplifier circuits | |
| GB201591A (en) | Improvements in systems of reception for modulated wave telegraphy and telephony | |
| GB1003288A (en) | Improvements relating to transistor circuits | |
| US2547984A (en) | Selectivity switching device | |
| GB484701A (en) | Improvements in or relating to frequency controlling electrical circuits | |
| GB303180A (en) | Improvements in filter circuit arrangements comprising piezo crystals | |
| US1897735A (en) | Multiple range radio receiving system | |
| US1921088A (en) | Wave signaling system | |
| US2013650A (en) | Preselector circuit for high frequency receivers | |
| GB645955A (en) | Improvements in electronic amplifiers | |
| GB855560A (en) | Improvements in or relating to band pass filters and amplifiers for use on very highfrequencies | |
| GB663667A (en) | Improvements in or relating to ultra high-frequency thermionic amplifiers | |
| US1996831A (en) | High frequency band filter | |
| GB577462A (en) | Improvements in electric multistage amplifiers | |
| SU77468A3 (en) | UHF receiver | |
| GB864444A (en) | A circuit connection for the input circuit of a receiver | |
| GB440333A (en) | Improvements in or relating to thermionic valve amplifiers | |
| GB468784A (en) | Improvements in or relating to radio receivers |