NL66164C - - Google Patents
Info
- Publication number
- NL66164C NL66164C NL66164DA NL66164C NL 66164 C NL66164 C NL 66164C NL 66164D A NL66164D A NL 66164DA NL 66164 C NL66164 C NL 66164C
- Authority
- NL
- Netherlands
- Prior art keywords
- arm
- band
- series
- peaks
- shunt
- Prior art date
Links
- 239000013078 crystal Substances 0.000 abstract 10
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 230000003247 decreasing effect Effects 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
- H03H9/0023—Balance-unbalance or balance-balance networks
- H03H9/0095—Balance-unbalance or balance-balance networks using bulk acoustic wave devices
-
- 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
- H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements
-
- 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
- H03H9/58—Multiple crystal filters
- H03H9/60—Electric coupling means therefor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1708—Comprising bridging elements, i.e. elements in a series path without own reference to ground and spanning branching nodes of another series path
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1775—Parallel LC in shunt or branch path
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)
- Filters And Equalizers (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US221721A US2248776A (en) | 1938-07-28 | 1938-07-28 | Wave filter |
US232067A US2199921A (en) | 1938-07-28 | 1938-09-20 | Wave filter |
Publications (1)
Publication Number | Publication Date |
---|---|
NL66164C true NL66164C (xx) | 1950-03-15 |
Family
ID=27361364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL66164D NL66164C (xx) | 1938-07-28 | 1939-07-27 |
Country Status (7)
Country | Link |
---|---|
US (2) | US2248776A (xx) |
BE (1) | BE435676A (xx) |
CH (1) | CH215766A (xx) |
DE (1) | DE742179C (xx) |
FR (1) | FR858308A (xx) |
GB (1) | GB531662A (xx) |
NL (1) | NL66164C (xx) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3179906A (en) * | 1965-04-20 | By-pass netwoems when | ||
FR861831A (fr) * | 1939-08-08 | 1941-02-18 | Materiel Telephonique | Filtres d'ondes électriques |
US2485863A (en) * | 1946-01-05 | 1949-10-25 | Western Electric Co | Method of and apparatus for making electrical measurements |
DE1223900B (de) * | 1954-03-10 | 1966-09-01 | Siemens Ag | Aus mehreren, Resonanzkreise enthaltenden Filtergliedern bestehendes Bandpassfilter relativ schmalen Durchlassbereiches |
NL112778C (xx) * | 1955-05-16 | |||
US2929031A (en) * | 1957-02-06 | 1960-03-15 | Hermes Electronics Co | Intermediate band width crystal filter |
US2988714A (en) * | 1957-09-12 | 1961-06-13 | Gen Electric | Piezoelectric filter network |
BE622704A (xx) * | 1961-09-22 | |||
BE622703A (xx) * | 1961-09-22 | |||
US3396327A (en) * | 1961-12-27 | 1968-08-06 | Toyotsushinki Kabushiki Kaisha | Thickness shear vibration type, crystal electromechanical filter |
US3564463A (en) * | 1966-04-11 | 1971-02-16 | Bell Telephone Labor Inc | Monolithic piezoelectric filter having mass loaded electrodes for resonation regions acoustically coupled together |
US3697903A (en) * | 1968-05-17 | 1972-10-10 | Clevite Corp | Equal-resonator piezoelectric ladder filters |
BE758421A (fr) * | 1969-11-06 | 1971-05-04 | Automatic Elect Lab | Filtre passe-bande a cristal polylithique, presentant des frequences polaires d'attenuation dans la bande d'arret inferieure |
US3613031A (en) * | 1969-12-15 | 1971-10-12 | Hughes Aircraft Co | Crystal ladder network having improved passband attenuation characteristic |
DE2001433C3 (de) * | 1970-01-07 | 1983-06-01 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | Bandpaßfilter |
US3686592A (en) * | 1970-10-08 | 1972-08-22 | Us Army | Monolithic coupled crystal resonator filter having cross impedance adjusting means |
US3704433A (en) * | 1971-05-27 | 1972-11-28 | Bell Telephone Labor Inc | Band-elimination filter |
JPS5249618Y2 (xx) * | 1972-10-21 | 1977-11-11 | ||
CA1041186A (en) * | 1976-04-28 | 1978-10-24 | Henry K. Yee | Monolithic crystal filters |
CA1101945A (en) * | 1977-04-15 | 1981-05-26 | Henry K. Yee | Single side band monolithic crystal filter |
US4163959A (en) * | 1977-12-15 | 1979-08-07 | Motorola, Inc. | Monolithic crystal filter device |
US4207535A (en) * | 1978-03-20 | 1980-06-10 | Motorola, Inc. | Two-pole, fixed-tuned monolithic crystal frequency discriminator |
US4246554A (en) * | 1978-12-11 | 1981-01-20 | E-Systems, Inc. | Inductorless monolithic crystal filter network |
US4281300A (en) * | 1979-11-08 | 1981-07-28 | Motorola, Inc. | Multi-pole crystal filter and method of improving the frequency response |
US5051711A (en) * | 1989-04-27 | 1991-09-24 | Ten-Tec, Inc. | Variable bandwidth crystal filter with varactor diodes |
US5030934A (en) * | 1989-07-05 | 1991-07-09 | Motorola, Inc. | Crystal notch filter comprising discrete quartz crystals coupled to a trimmable RC bridging network |
US5703058A (en) * | 1995-01-27 | 1997-12-30 | Emory University | Compositions containing 5-fluoro-2',3'-didehydro-2',3'-dideoxycytidine or a mono-, di-, or triphosphate thereof and a second antiviral agent |
JP4073177B2 (ja) * | 2001-05-11 | 2008-04-09 | 株式会社村田製作所 | 圧電フィルタ |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1967250A (en) * | 1931-09-19 | 1934-07-24 | Bell Telephone Labor Inc | Wave filter |
-
1938
- 1938-07-28 US US221721A patent/US2248776A/en not_active Expired - Lifetime
- 1938-09-20 US US232067A patent/US2199921A/en not_active Expired - Lifetime
-
1939
- 1939-07-20 DE DEI65224D patent/DE742179C/de not_active Expired
- 1939-07-26 CH CH215766D patent/CH215766A/de unknown
- 1939-07-26 FR FR858308D patent/FR858308A/fr not_active Expired
- 1939-07-27 NL NL66164D patent/NL66164C/xx active
- 1939-07-28 GB GB21991/39A patent/GB531662A/en not_active Expired
- 1939-07-28 BE BE435676D patent/BE435676A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
BE435676A (xx) | 1939-08-31 |
GB531662A (en) | 1941-01-08 |
US2199921A (en) | 1940-05-07 |
CH215766A (de) | 1941-07-15 |
DE742179C (de) | 1943-12-11 |
FR858308A (fr) | 1940-11-22 |
US2248776A (en) | 1941-07-08 |
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