GB494884A - Improvements in or relating to electrical oscillation generators - Google Patents
Improvements in or relating to electrical oscillation generatorsInfo
- Publication number
- GB494884A GB494884A GB8526/38A GB852638A GB494884A GB 494884 A GB494884 A GB 494884A GB 8526/38 A GB8526/38 A GB 8526/38A GB 852638 A GB852638 A GB 852638A GB 494884 A GB494884 A GB 494884A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- series
- circuit
- tuned
- valve
- 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
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 239000013078 crystal Substances 0.000 abstract 3
- 230000001939 inductive effect Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 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
494,884. Valve generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 19, 1938, No. 8526. Convention date, March 20, 1937. [Class 40 (v)] A generator comprises a pair of valves in push-pull having a tuned output circuit and coupling between the grid and anode circuits and a tuned circuit comprising a condenser in series with two inductance coils connected in push-pull to the valve grids and between, and in series with, the coils a sharply resonant frequency stabilizing circuit or device, of substantially zero impedance at the operating frequency, shunted by resistance. The Figure shows a grid tuned circuit 16, 18, 20 and a piezoelectric crystal 26 having series inductances 28, 30 for tuning out crystal electrode and holder capacity. In place of capacitive coupling 22, 24 inductive coupling may be used between the grid and anode circuits. The Specification as open to inspection under Sect. 91 describes also a single valve oscillator in which a piezo-electric crystal shunted by a resistance is included in series in the grid circuit of a back-coupled tetrode, Fig. 2 (Cancelled) (not shown). This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US494884XA | 1937-03-20 | 1937-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB494884A true GB494884A (en) | 1938-11-02 |
Family
ID=21960085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8526/38A Expired GB494884A (en) | 1937-03-20 | 1938-03-19 | Improvements in or relating to electrical oscillation generators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB494884A (en) |
-
1938
- 1938-03-19 GB GB8526/38A patent/GB494884A/en not_active Expired
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