GB876919A - Improvements in and relating to cascode amplifiers - Google Patents
Improvements in and relating to cascode amplifiersInfo
- Publication number
- GB876919A GB876919A GB162157A GB162157A GB876919A GB 876919 A GB876919 A GB 876919A GB 162157 A GB162157 A GB 162157A GB 162157 A GB162157 A GB 162157A GB 876919 A GB876919 A GB 876919A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- tapped
- passband
- jan
- coupling network
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Superheterodyne Receivers (AREA)
Abstract
876,919. Valve frequency selective amplifying circuits. PLESSEY CO. Ltd. Jan. 16, 1958 [Jan. 16, 1957], No. 1621/57. Class 40(6) A bandpass cascode amplifier has a coupling network connected between the two stages which produces a high attenuation at a frequency outside the passband, and a low attenuation at a frequency within the passband. In Fig. 1, the coupling network comprises a tuned circuit Lac and Cl which is tapped at b. The gain frequency characteristic, Fig. 2, is flat over a wide frequency range and the apparatus may form part of a television receiver adapted to receive bands I and III the rejection frequency f 1 being that of the receiver intermediate frequency. In further embodiments, the inductor Lac may be symetrically tapped, Fig. 5 (not shown) or the tapped portion may be replaced by a double-wound transformer, Fig. 6 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB162157A GB876919A (en) | 1957-01-16 | 1957-01-16 | Improvements in and relating to cascode amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB162157A GB876919A (en) | 1957-01-16 | 1957-01-16 | Improvements in and relating to cascode amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB876919A true GB876919A (en) | 1961-09-06 |
Family
ID=9725120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB162157A Expired GB876919A (en) | 1957-01-16 | 1957-01-16 | Improvements in and relating to cascode amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB876919A (en) |
-
1957
- 1957-01-16 GB GB162157A patent/GB876919A/en not_active Expired
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