GB297004A - Improvements in or relating to circuit arrangements for use in high frequency communication systems - Google Patents
Improvements in or relating to circuit arrangements for use in high frequency communication systemsInfo
- Publication number
- GB297004A GB297004A GB26000/28A GB2600028A GB297004A GB 297004 A GB297004 A GB 297004A GB 26000/28 A GB26000/28 A GB 26000/28A GB 2600028 A GB2600028 A GB 2600028A GB 297004 A GB297004 A GB 297004A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- transformer
- output
- audio
- couplings
- 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
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/46—Reflex amplifiers
- H03F3/48—Reflex amplifiers with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Superheterodyne Receivers (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
297,004. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Shapiro, L.). Sept. 10, 1927, [Convention date]. Thermionic amplifiers and heterodyne receivers. -In a supersonic heterodyne receiver having a common intermediate, radio and audio frequency amplifier the input and output impedances are connected in series or in series-parallel. The Figure shows an amplifier 3 for radio frequency from the loop 6 the output from which is applied through transformer 19 to a detector-oscillator 2. The output at intermediate frequency is applied to the amplifier 3 through transformer 14 and the amplified intermediate frequency energy is applied to a detector 4 through transformer 12. The audio-frequency output is applied to the amplier 3 through transformer 9 and the amplified audio-frequency is applied to an output amplifying valve 1 through transformer 23. In a modification, instead of the intermediate frequency couplings being arranged in parallel to the radio and audio-frequency couplings in seiries all the couplings are arranged in series each shunted by a. filter circuit having a high impedance at the frequency in question and a low impedance at other frequencies. Each filter comprises at least two meshes and accurate tuning of the rejector circuits is necessary.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US297004XA | 1927-09-10 | 1927-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB297004A true GB297004A (en) | 1929-02-21 |
Family
ID=21850403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26000/28A Expired GB297004A (en) | 1927-09-10 | 1928-09-10 | Improvements in or relating to circuit arrangements for use in high frequency communication systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB297004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2194110A (en) * | 1986-07-14 | 1988-02-24 | Era Patents Ltd | Reflex microwave amplifier |
-
1928
- 1928-09-10 GB GB26000/28A patent/GB297004A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2194110A (en) * | 1986-07-14 | 1988-02-24 | Era Patents Ltd | Reflex microwave amplifier |
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