GB400473A - Improvements in or relating to electrical oscillation generators - Google Patents
Improvements in or relating to electrical oscillation generatorsInfo
- Publication number
- GB400473A GB400473A GB4144/33A GB414433A GB400473A GB 400473 A GB400473 A GB 400473A GB 4144/33 A GB4144/33 A GB 4144/33A GB 414433 A GB414433 A GB 414433A GB 400473 A GB400473 A GB 400473A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- valve
- tuned circuit
- grid
- coil
- 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 abstract 3
- 239000013078 crystal Substances 0.000 abstract 5
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 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
400,473. Valve generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London. -(Assignees of Franklin, R. E. ; Rocky Point, Long Island, New York, U.S.A.) Feb. 10, 1933, No. 4144. Convention date, Feb. 10, 1932. [Classes 40 (iii) and 40 (v).] An oscillation generator comprises a parallel tuned circuit 18, 20 connected between two electrodes of a valve 2, a piezo-electric crystal 16 being connected between the coil 18 and condenser 20. Spurious oscillations due to the crystal acting as a simple dielectric are avoided, the crystal acting as a series-tuned circuit for the desired frequency and the grid-tuned circuit acting as a byepass for the spurious frequencies. The tuned circuit 18, 16, 20 is preferably connected between grid and cathode of the valve, and the feed-back coil 24 is reversed relative to coil 18 so that the circuit fails to oscillate without the crystal. An earthed screen 26 between the coils 24, 18 prevents capacitive coupling. In a modification, a screen grid valve is used and one plate of the crystal is earthed, Fig. 2 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US400473XA | 1932-02-10 | 1932-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB400473A true GB400473A (en) | 1933-10-26 |
Family
ID=21908795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4144/33A Expired GB400473A (en) | 1932-02-10 | 1933-02-10 | Improvements in or relating to electrical oscillation generators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB400473A (en) |
-
1933
- 1933-02-10 GB GB4144/33A patent/GB400473A/en not_active Expired
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