GB563486A - Improvements in thermionic valve circuits employing degenerative feedback - Google Patents
Improvements in thermionic valve circuits employing degenerative feedbackInfo
- Publication number
- GB563486A GB563486A GB204543A GB204543A GB563486A GB 563486 A GB563486 A GB 563486A GB 204543 A GB204543 A GB 204543A GB 204543 A GB204543 A GB 204543A GB 563486 A GB563486 A GB 563486A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- frequency
- output
- grid
- earth
- 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
- 230000003412 degenerative effect Effects 0.000 title abstract 3
- 230000007850 degeneration Effects 0.000 abstract 2
- 230000005284 excitation Effects 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
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
563,486. Thermionic valve circuits. COSSOR, Ltd., A. C., and WYNN, A. H. A. Feb. 8, 1943, No. 2045. [Classes 40 (iii) and 40 (v)] A circuit, the impedance/frequency characteristic of which simulates that of a series resonant circuit, comprises the anode cathode path of a valve, the grid of which is excited solely with a degenerative feedback signal derived from the output of the valve through an auxiliary thermionic valve amplifier which itself has a degenerative feedback path including a bridge balanced at the resonant frequency. The Figure shows an arrangement in which there is obtained between terminal T and earth the properties of a circuit series resonant at the balance frequency of the twin-T networks R1, R2, R3, C1, C2, C3. The grid excitation of the valve V1 consists solely of a signal developed across its cathode load R8 and the output consists of load resistance R7 in parallel with the external circuits connected between the terminal T and earth. The output voltage is applied through a condenser C5 to the suppressor grid of amplifying valve V2, the output of which comprises a resistance R6 in parallel with the cathode resistance R8. The output voltage is also applied degeneratively through the twin-T network to the control grid of the valve V2. At the bridge balance-frequency this feedback is zero so that the valve V2 has maximum gain giving maximum degeneration at this frequency in the valve VI and so producing a low impedance between the terminal T and earth. At other frequencies the gain in V2 is low due to degeneration and consequently the impedance of the valve V1 is high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB204543A GB563486A (en) | 1943-02-08 | 1943-02-08 | Improvements in thermionic valve circuits employing degenerative feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB204543A GB563486A (en) | 1943-02-08 | 1943-02-08 | Improvements in thermionic valve circuits employing degenerative feedback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB563486A true GB563486A (en) | 1944-08-16 |
Family
ID=9732641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB204543A Expired GB563486A (en) | 1943-02-08 | 1943-02-08 | Improvements in thermionic valve circuits employing degenerative feedback |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB563486A (en) |
-
1943
- 1943-02-08 GB GB204543A patent/GB563486A/en not_active Expired
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