GB595210A - Improvements in or relating to wide band thermionic amplifiers - Google Patents
Improvements in or relating to wide band thermionic amplifiersInfo
- Publication number
- GB595210A GB595210A GB8576/45A GB857645A GB595210A GB 595210 A GB595210 A GB 595210A GB 8576/45 A GB8576/45 A GB 8576/45A GB 857645 A GB857645 A GB 857645A GB 595210 A GB595210 A GB 595210A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistors
- valve
- frequencies
- coupling condenser
- low
- 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)
Abstract
595,210. Thermionic valve circuits for amplifying. 'PHILCO RADIO & TELEVISION CORPORATION. April 6, 1945, No. 8576. Convention date, Nov. 20, 1944. [Class 40 (v)] An amplifier operating over an extended frequency range comprises two valves connected by a coupling condenser in shunt with two resistors having a constant potential device between them, the resistors having impedances high compared with that of the device at low frequencies and low compared with that of the coupling condenser. As shown, the anode of valve 10 is coupled to the grid of valve 26 through coupling condenser 23, which has a low impedance at the higher frequencies, the resistors 40 and 41 being high enough to isolate the gas discharge tube 42 so that its distributed capacity to ground does not effect the upper cut-off frequency. The resistors are made physically quite small so that they have negligible distributed capacity. At the lower frequencies, including direct current, the impedance of condenser 23 is high compared with that of resistors 40, 41, causing tube 42 to strike, thus providing a path for the lowfrequency signals. A peaking inductance 18 may be provided in the output circuit of the first valve for maintaining the output voltage at the higher frequencies.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US564312A US2429419A (en) | 1944-11-20 | 1944-11-20 | Electrical amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595210A true GB595210A (en) | 1947-11-28 |
Family
ID=24253973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8576/45A Expired GB595210A (en) | 1944-11-20 | 1945-04-06 | Improvements in or relating to wide band thermionic amplifiers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2429419A (en) |
| GB (1) | GB595210A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2699260A (en) * | 1948-07-27 | 1955-01-11 | Thomas R Komline | Filter media |
| US3081435A (en) * | 1955-10-20 | 1963-03-12 | Electronic Associates | Suppression of grid current effects in d. c. amplifiers |
| US3065428A (en) * | 1955-11-25 | 1962-11-20 | Reeves Instrument Corp | Apparatus for reducing effects of grid current in stabilized amplifiers |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1927755A (en) * | 1930-03-08 | 1933-09-19 | Rogowski Walter | Method of transmitting electric potentials |
| GB369578A (en) * | 1930-12-20 | 1932-03-21 | William Beveridge Mackenzie | Improvements in and relating to electrical circuit arrangements using a gas discharge device, applicable to direct current amplifiers, and other electrical control amplifying and relaying apparatus |
| GB433545A (en) * | 1934-02-16 | 1935-08-16 | Richard Hugh Loraine Bevan | Improvements in and relating to automatic stabilisation for electrical circuit arrangements using a gas discharge tube as an intervalve coupling |
| US2243121A (en) * | 1938-04-01 | 1941-05-27 | Rca Corp | Amplifying system |
| US2324279A (en) * | 1941-11-29 | 1943-07-13 | Rca Corp | Amplifier |
-
1944
- 1944-11-20 US US564312A patent/US2429419A/en not_active Expired - Lifetime
-
1945
- 1945-04-06 GB GB8576/45A patent/GB595210A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2429419A (en) | 1947-10-21 |
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