GB619228A - Improvements in or relating to circuits for generating high-frequency oscillations - Google Patents
Improvements in or relating to circuits for generating high-frequency oscillationsInfo
- Publication number
- GB619228A GB619228A GB12976/46A GB1297646A GB619228A GB 619228 A GB619228 A GB 619228A GB 12976/46 A GB12976/46 A GB 12976/46A GB 1297646 A GB1297646 A GB 1297646A GB 619228 A GB619228 A GB 619228A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- transformer
- coils
- grid
- circuits
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/40—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Power Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Ac-Ac Conversion (AREA)
Abstract
619,228. Valve generating circuits. PHILIPS LAMPS, Ltd. April 30, 1946, No. 12976. Convention date, Jan. 31, 1942. [Class 40 (vi)] An increase in the efficiency of push-pull connected oscillator using an A.C. anode supply connected to the valves in antiphase is obtained by suppressing the grid current of each valve during the half-cycle when the corresponding anode is negative. Fig. 2 shows an oscillator in which the grid coils 3 and 4 are coupled through the respective inter-electrode capacitance to anode coils 6 and 7. Coils 3 and 4 are preferably arranged to have no mutual coupling. The A.C. supply is fed to the anodes through transformer 9 and also in the same phase through transformer 15 to the grids. Alternatively, valves such as diodes or triodes may be used for the grid leaks and their impedance varied by means of the voltage obtained from transformer 15. In another arrangement, Fig. 4, the bias voltage for suppressing grid current is obtained from resistors 23 and 24 inserted in series with the anode circuits. Specifications 177,269 and 184,216, [both in Class 40 (v)], are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL619228X | 1942-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB619228A true GB619228A (en) | 1949-03-07 |
Family
ID=19788383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12976/46A Expired GB619228A (en) | 1942-01-31 | 1946-04-30 | Improvements in or relating to circuits for generating high-frequency oscillations |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE450127A (en) |
| GB (1) | GB619228A (en) |
| NL (1) | NL62736C (en) |
-
0
- BE BE450127D patent/BE450127A/xx unknown
- NL NL62736D patent/NL62736C/xx active
-
1946
- 1946-04-30 GB GB12976/46A patent/GB619228A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL62736C (en) | |
| BE450127A (en) |
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