GB1476739A - Frequency stop band electric filter - Google Patents
Frequency stop band electric filterInfo
- Publication number
- GB1476739A GB1476739A GB4704174A GB4704174A GB1476739A GB 1476739 A GB1476739 A GB 1476739A GB 4704174 A GB4704174 A GB 4704174A GB 4704174 A GB4704174 A GB 4704174A GB 1476739 A GB1476739 A GB 1476739A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- resonant circuit
- arm
- oct
- capacitor
- 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
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
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezo-electric or electrostrictive material
- H03H9/542—Filters comprising resonators of piezo-electric or electrostrictive material including passive elements
Abstract
1476739 Filter circuits COMPAGNIE D'ELECTRONIQUE ET DE PIEZOELECTRICITE CEPE 30 Oct 1974 [31 Oct 1973 47041/74 Heading H3U A bridged-T filter circuit comprises: a horizontal arm comprising a parallel connection of a capacitor C 2 and two serially-connected inductances L 1 ; a vertical arm comprising a capacitor C 1 ; a resonant circuit connected in parallel with either the horizontal arm, Fig. 2, or the vertical arm, Fig. 3; and a bridging inductance L 2 with a value determined, by means of a given relationship, by the load impedance Z of the filter. The resonant circuit may be constituted by a piezoelectric resonator Q. Alternatively or in addition the resonant circuit may be connected to the associated arm by means of an impedance-matching transformer T 1 , Fig. 5; in one such arrangement, Fig. 8, the bridging inductance L 2 constitutes the primary winding of the transformer. The characteristic of the filter (Fig. 1, not shown) is a wide pass-band containing a relatively narrow stop-band centred at the resonant frequency of the resonant circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7338911A FR2250229B1 (en) | 1973-10-31 | 1973-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1476739A true GB1476739A (en) | 1977-06-16 |
Family
ID=9127200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4704174A Expired GB1476739A (en) | 1973-10-31 | 1974-10-30 | Frequency stop band electric filter |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5075754A (en) |
| DD (1) | DD114732A5 (en) |
| DE (1) | DE2451653A1 (en) |
| FR (1) | FR2250229B1 (en) |
| GB (1) | GB1476739A (en) |
| PL (1) | PL94893B1 (en) |
| SE (1) | SE394168B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10700666B2 (en) | 2017-02-08 | 2020-06-30 | Taiyo Yuden Co., Ltd. | Filter circuit, multiplexer, and module |
| CN114448387A (en) * | 2021-12-28 | 2022-05-06 | 深圳市恒运昌真空技术有限公司 | Method for adjusting impedance matching and impedance matching circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19843465B4 (en) * | 1998-09-22 | 2005-06-02 | Vacuumschmelze Gmbh | Current-compensated radio interference suppression choke |
-
1973
- 1973-10-31 FR FR7338911A patent/FR2250229B1/fr not_active Expired
-
1974
- 1974-10-29 SE SE7413622A patent/SE394168B/en unknown
- 1974-10-30 DE DE19742451653 patent/DE2451653A1/en not_active Withdrawn
- 1974-10-30 PL PL1974175245A patent/PL94893B1/pl unknown
- 1974-10-30 GB GB4704174A patent/GB1476739A/en not_active Expired
- 1974-10-31 DD DD182070A patent/DD114732A5/xx unknown
- 1974-10-31 JP JP49126047A patent/JPS5075754A/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10700666B2 (en) | 2017-02-08 | 2020-06-30 | Taiyo Yuden Co., Ltd. | Filter circuit, multiplexer, and module |
| CN114448387A (en) * | 2021-12-28 | 2022-05-06 | 深圳市恒运昌真空技术有限公司 | Method for adjusting impedance matching and impedance matching circuit |
| CN114448387B (en) * | 2021-12-28 | 2022-12-27 | 深圳市恒运昌真空技术有限公司 | Method for adjusting impedance matching and impedance matching circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| SE394168B (en) | 1977-06-06 |
| DD114732A5 (en) | 1975-08-12 |
| JPS5075754A (en) | 1975-06-21 |
| DE2451653A1 (en) | 1975-05-07 |
| SE7413622L (en) | 1975-05-02 |
| FR2250229B1 (en) | 1976-10-01 |
| FR2250229A1 (en) | 1975-05-30 |
| PL94893B1 (en) | 1977-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |