GB412154A - Improvements in or relating to electron discharge device oscillation generators - Google Patents
Improvements in or relating to electron discharge device oscillation generatorsInfo
- Publication number
- GB412154A GB412154A GB6639/34A GB663934A GB412154A GB 412154 A GB412154 A GB 412154A GB 6639/34 A GB6639/34 A GB 6639/34A GB 663934 A GB663934 A GB 663934A GB 412154 A GB412154 A GB 412154A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- valve
- harmonic
- frequency
- tuned
- 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
- 230000010355 oscillation Effects 0.000 title 1
- 235000001188 Peltandra virginica Nutrition 0.000 abstract 1
- 244000197580 Poria cocos Species 0.000 abstract 1
- 235000008599 Poria cocos Nutrition 0.000 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
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
- H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
- H03B19/06—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes
- H03B19/08—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a discharge device
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
412,154. Valve generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Whitaker, J. N. ; 95, Highland Avenue, Tuckahoe, New York, U.S.A.) March 1, 1934, No. 6639. Convention date, March 1, 1933. [Class 40 (v).] An harmonic or sub-harmonic frequency generator comprises a dynatron oscillator with an input circuit supplied with a fundamental frequency and an output circuit tuned to a desired harmonic or sub-harmonic. As shown, the input is applied from a source 3 through a transformer 4 to the control grid circuit 5 of a screen-grid valve 1 operating as a dynatron. The plate circuit is tuned by a circuit 7, 8 to the desired harmonic or sub-harmonic, and is coupled through a condenser K to the input grid circuit of a second dynatron 2. The plate circuit of this valve is tuned by a circuit 11, 12, and the condensers 8, 12 may be ganged. One valve only may be used, but preferably the first valve is used for effecting the frequency change, and the second for restoring the wave to sine form. Alternatively, one valve may be used for frequency multiplication, and the other for frequency reduction. In this way a large number of harmonically-related tone frequencies may be produced for use as carriers in facsimile or other high-speed telegraphy.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US412154XA | 1933-03-01 | 1933-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB412154A true GB412154A (en) | 1934-06-21 |
Family
ID=21915358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6639/34A Expired GB412154A (en) | 1933-03-01 | 1934-03-01 | Improvements in or relating to electron discharge device oscillation generators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB412154A (en) |
-
1934
- 1934-03-01 GB GB6639/34A patent/GB412154A/en not_active Expired
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