GB627608A - Improvements in or relating to piezo-electric crystal circuit arrangements - Google Patents
Improvements in or relating to piezo-electric crystal circuit arrangementsInfo
- Publication number
- GB627608A GB627608A GB36066/46A GB3606646A GB627608A GB 627608 A GB627608 A GB 627608A GB 36066/46 A GB36066/46 A GB 36066/46A GB 3606646 A GB3606646 A GB 3606646A GB 627608 A GB627608 A GB 627608A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- frequencies
- common
- piezo
- crystals
- 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 title abstract 6
- 230000010355 oscillation Effects 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
627,608. Impedance networks. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and MORTLEY, W. S. Dec. 5, 1946, No. 36066. [Class 40 (viii)] A piezo - electrically controlled circuit includee a number of crystal circuits designed to have a common resonant frequency and loss intro. ducing coupling means connect points in the cir. cuits which have sub. stantially no potential difference therebetween in operation at the common frequency but are not at the same potential at other frequencies. The loss producing means will then damp out oscillations at all frequencies other than the common frequency. In order to ensure that the unwanted resonances in the crystals are dissimilar, a slight deliberate difference may be made in their electrode or quartz dimensions. As shown, crystals C are coupled to a negative inductance D by lines of length #/4, where A is the common resonant wave length and damping- resistances R are inserted. At unwanted resonance frequencies in one crystal and its attendant network, the other crystal will act substantially as a short circuit and its resistance R will damp the oscillations. Specification 618,967 is referred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB269327X | 1946-12-05 | ||
| GB30947X | 1947-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB627608A true GB627608A (en) | 1949-08-11 |
Family
ID=26238015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36066/46A Expired GB627608A (en) | 1946-12-05 | 1946-12-05 | Improvements in or relating to piezo-electric crystal circuit arrangements |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH269327A (en) |
| DE (1) | DE806556C (en) |
| FR (1) | FR958936A (en) |
| GB (1) | GB627608A (en) |
-
0
- FR FR958936D patent/FR958936A/fr not_active Expired
-
1946
- 1946-12-05 GB GB36066/46A patent/GB627608A/en not_active Expired
-
1947
- 1947-12-29 CH CH269327D patent/CH269327A/en unknown
-
1949
- 1949-03-01 DE DEP30035D patent/DE806556C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE806556C (en) | 1951-07-12 |
| CH269327A (en) | 1950-06-30 |
| FR958936A (en) | 1950-03-21 |
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