GB431900A - Improvements in or relating to thermionic valve circuit arrangements - Google Patents
Improvements in or relating to thermionic valve circuit arrangementsInfo
- Publication number
- GB431900A GB431900A GB33760/34A GB3376034A GB431900A GB 431900 A GB431900 A GB 431900A GB 33760/34 A GB33760/34 A GB 33760/34A GB 3376034 A GB3376034 A GB 3376034A GB 431900 A GB431900 A GB 431900A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tuned
- circuits
- circuit
- rejector
- amplifier
- 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
- 230000003472 neutralizing effect Effects 0.000 abstract 2
- 230000001808 coupling effect Effects 0.000 abstract 1
- 238000013016 damping Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
- H03H7/0161—Bandpass filters
Landscapes
- Amplifiers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
431,900. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Plebanski, J. ; 32, Wspolna, Warsaw) Nov. 23, 1934, No. 33760. Convention date, Aug. 18. [Class 40 (v)] In a thermionic amplifier of the kind employing one or more tuned rejector circuits connected to auxiliary grids, means are provided for eliminating capacity coupling effects between the auxiliary grid and the input grid. As shown, an auxiliary grid is situated between the input grid and the output anode of a tuned high-frequency valve amplifier and .is connected to a tapping on a circuit L, C tuned to an undesired frequency. One side of the tuned circuit is earthed through a condenser and is connected to a positive voltage source through a resistance R. The other side of the tuned circuit is connected to the input grid through a neutralizing condenser NC. If the rejector circuit L, C is tuned fairly closely at one side of the desired frequency, it produces a sharp fall in the resonance characteristic on that side ; and by employing two rejector circuits tuned respectively on each side of the desired frequency the resonance characteristic falls sharply on both sides. The two rejector circuits may be included in successive stages of a cascade amplifier, Fig. 3, (not shown) ; or they may be connected to separate grids of the same valve, Fig. 5, (not shown). Self-oscillation may be prevented by the use of additional screening-grids and screening-boxes for the circuit elements. Damping of the rejector circuits may be controlled by unbalancing the neutralizing condensers. The amplifier is given a band-pass characteristic by employing coupled output circuits OC.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL431900X | 1934-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB431900A true GB431900A (en) | 1935-07-17 |
Family
ID=19936338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33760/34A Expired GB431900A (en) | 1934-08-18 | 1934-11-23 | Improvements in or relating to thermionic valve circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB431900A (en) |
-
1934
- 1934-11-23 GB GB33760/34A patent/GB431900A/en not_active Expired
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