GB419661A - Improvements in or relating to the control of high frequency currents - Google Patents
Improvements in or relating to the control of high frequency currentsInfo
- Publication number
- GB419661A GB419661A GB2834134A GB2834134A GB419661A GB 419661 A GB419661 A GB 419661A GB 2834134 A GB2834134 A GB 2834134A GB 2834134 A GB2834134 A GB 2834134A GB 419661 A GB419661 A GB 419661A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- frequencies
- crystals
- range
- relating
- 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 7
- 241000220479 Acacia Species 0.000 abstract 1
- 235000010643 Leucaena leucocephala Nutrition 0.000 abstract 1
- 238000007689 inspection 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/56—Monolithic crystal filters
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
419,661. Piezo - electric crystals. GUERBILSKY, A., 45<ter>, Rue des Acacias, Paris. May 17, 1933, No. 28341/34. Divided out of 418,603 under which a Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 20, 1933. [Classes 40 (iii) and 40 (v).] A band-pass filter comprises a piezoelectric crystal whose thickness in its direction of vibration varies over its surface. In Fig. 2, the crystal Q has one electrode effectively interrupted at x<1> so as to render the crystal ineffective over one range of its frequencies. The crystal will byepass frequencies on either side of the excluded range. In another modification, two crystals Q<1>, Q2, Fig. 1, are used with frequency ranges separated by the desired width. The principle of the invention may be utilized in a series arrangement of the crystal as in Specification 282,445, [Class 40 (v)], instead of the parallel arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2834134A GB419661A (en) | 1933-05-17 | 1933-05-17 | Improvements in or relating to the control of high frequency currents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2834134A GB419661A (en) | 1933-05-17 | 1933-05-17 | Improvements in or relating to the control of high frequency currents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB419661A true GB419661A (en) | 1934-11-15 |
Family
ID=10274146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2834134A Expired GB419661A (en) | 1933-05-17 | 1933-05-17 | Improvements in or relating to the control of high frequency currents |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB419661A (en) |
-
1933
- 1933-05-17 GB GB2834134A patent/GB419661A/en not_active Expired
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