GB519672A - Improvements in and relating to electric oscillation generators - Google Patents
Improvements in and relating to electric oscillation generatorsInfo
- Publication number
- GB519672A GB519672A GB1952338A GB1952338A GB519672A GB 519672 A GB519672 A GB 519672A GB 1952338 A GB1952338 A GB 1952338A GB 1952338 A GB1952338 A GB 1952338A GB 519672 A GB519672 A GB 519672A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rectifier
- grid
- feedback
- circuit
- resistance
- 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
- 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
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
519,672. Valve generating circuits. TELEPHONE MANUFACTURING CO., Ltd., and PADDLE, L. H. July 1, 1938, Nos. 19523 and 24014. [Class 40 (v)] In a generator the path from the valve output to the resonant circuit or the path to the valve input includes means including an asymmetrically conducting impedance the voltage conditions of which are adjustable for suppressing part of the cycle of current in that path so that feedback occurs during less than 360 degrees in each cycle. Fig. 2 shows an arrangement in which the feedback from the anode to the tuned circuit L1C1, includes a rectifier M1 biassed from a resistance R4 in the anode supply. The pass direction of the rectifier determines whether a positive or negative pulse permits current to flow to the tuned circuit and is preferably so arranged that the feed is when the grid is swinging negative to avoid grid current. The bias of the rectifier controls the length of the cycle and so the amount of feedback. The feedback path may include a resistance in series with the rectifier and the bias may be derived from a separate battery. The resonant circuit may be coupled to the input by an impedance step-down device. A screen grid or pentode valve may be used with the load taken from the screen and the feedback from the anode circuit. The anode may be operated at a low potential so that a non-sinusoidal voltage is produced thereat. The asymmetric conductor may be a dry contact rectifier and may be arranged in the grid circuit in series with a resistance, Fig. 10 (not shown). The bias control may be automatic by means of a rectifier M2 and load resistance R8, Fig. 5, fed from the output. The grid potential may be limited by a grid leak or a rectifier and condenser when grid current occurs. Phase control means may be associated with the feedback circuit comprising a condenser in series or parallel with the rectifier, Fig. 8 shows an arrangement in which phase control is produced by condenser C4 and adjusted by series resistance R10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1952338A GB519672A (en) | 1938-07-01 | 1938-07-01 | Improvements in and relating to electric oscillation generators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1952338A GB519672A (en) | 1938-07-01 | 1938-07-01 | Improvements in and relating to electric oscillation generators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB519672A true GB519672A (en) | 1940-04-03 |
Family
ID=10130811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1952338A Expired GB519672A (en) | 1938-07-01 | 1938-07-01 | Improvements in and relating to electric oscillation generators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB519672A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760070A (en) * | 1955-02-04 | 1956-08-21 | Gen Electric | Amplitude stabilized transistor oscillator circuit |
| US2841711A (en) * | 1953-09-23 | 1958-07-01 | Rca Corp | Oscillation generator |
-
1938
- 1938-07-01 GB GB1952338A patent/GB519672A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2841711A (en) * | 1953-09-23 | 1958-07-01 | Rca Corp | Oscillation generator |
| US2760070A (en) * | 1955-02-04 | 1956-08-21 | Gen Electric | Amplitude stabilized transistor oscillator circuit |
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