GB527146A - Improvements in vacuum tube oscillators - Google Patents
Improvements in vacuum tube oscillatorsInfo
- Publication number
- GB527146A GB527146A GB10181/39A GB1018139A GB527146A GB 527146 A GB527146 A GB 527146A GB 10181/39 A GB10181/39 A GB 10181/39A GB 1018139 A GB1018139 A GB 1018139A GB 527146 A GB527146 A GB 527146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- circuit
- crystal
- valve
- potential
- 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
- 239000013078 crystal Substances 0.000 abstract 4
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 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
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Abstract
527,146. Valve generating circuits. BRITISH THOMSON-HOUSTON CO., Ltd. March 31, 1939, No. 10181. Convention date, March 31, 1938. [Classes 39 (i) and 40 (v)] A valve oscillator comprises one grid 16 at a higher positive potential than the anode 21, a second grid 24 at a negative potential, a tuned circuit 14, 15 connected between the first grid and the cathode, and resonant means such as a piezo-electric crystal 29 for providing feed-back from the first grid to the second. With this arrangement, an increase of potential across circuit 14, 15 results in a decrease of current flowing from this circuit to grid 16 so that a negative-resistance effect is obtained. If the crystal breaks down the valve will continue to oscillate by feed-back through the inherent capacity of the crystal holder and associated wiring. In a modification, Fig. 3 (not shown), the crystal is replaced by a sharply-resonant series tuned circuit which is preferably enclosed under constant temperature and humidity conditions, and a third grid 27, which in Fig. 1 is connected directly to the cathode, is given a small negative bias. The circuit 14, 15 may be tuned to a harmonic of the fundamental frequency.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US527146XA | 1938-03-31 | 1938-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB527146A true GB527146A (en) | 1940-10-03 |
Family
ID=21979433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10181/39A Expired GB527146A (en) | 1938-03-31 | 1939-03-31 | Improvements in vacuum tube oscillators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB527146A (en) |
-
1939
- 1939-03-31 GB GB10181/39A patent/GB527146A/en not_active Expired
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