DE2964149D1 - A monolithic crystal filter having a passband symmetrical about a center frequency - Google Patents

A monolithic crystal filter having a passband symmetrical about a center frequency

Info

Publication number
DE2964149D1
DE2964149D1 DE7979301868T DE2964149T DE2964149D1 DE 2964149 D1 DE2964149 D1 DE 2964149D1 DE 7979301868 T DE7979301868 T DE 7979301868T DE 2964149 T DE2964149 T DE 2964149T DE 2964149 D1 DE2964149 D1 DE 2964149D1
Authority
DE
Germany
Prior art keywords
passband
symmetrical
center frequency
crystal filter
monolithic crystal
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
Application number
DE7979301868T
Other languages
English (en)
Inventor
Loving, Jr
Kamin, Jr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of DE2964149D1 publication Critical patent/DE2964149D1/de
Expired legal-status Critical Current

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 piezoelectric or electrostrictive material
    • H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Filters And Equalizers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
DE7979301868T 1978-10-10 1979-09-12 A monolithic crystal filter having a passband symmetrical about a center frequency Expired DE2964149D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/950,201 US4224586A (en) 1978-10-10 1978-10-10 Monolithic crystal filter having a passband symmetrical about a center frequency

Publications (1)

Publication Number Publication Date
DE2964149D1 true DE2964149D1 (en) 1983-01-05

Family

ID=25490099

Family Applications (1)

Application Number Title Priority Date Filing Date
DE7979301868T Expired DE2964149D1 (en) 1978-10-10 1979-09-12 A monolithic crystal filter having a passband symmetrical about a center frequency

Country Status (12)

Country Link
US (1) US4224586A (de)
EP (1) EP0009900B1 (de)
JP (1) JPS5552624A (de)
AR (1) AR217203A1 (de)
AU (1) AU524799B2 (de)
BR (1) BR7906228A (de)
CA (1) CA1125397A (de)
DE (1) DE2964149D1 (de)
IL (1) IL58156A (de)
MX (1) MX148075A (de)
PH (1) PH18857A (de)
ZA (1) ZA794565B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409927A1 (de) * 1984-03-17 1985-09-26 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Breitbandiges anpassungsnetzwerk

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2198684A (en) * 1938-09-20 1940-04-30 Bell Telephone Labor Inc Wave filter
US2271870A (en) * 1939-11-10 1942-02-03 Bell Telephone Labor Inc Wave transmission network
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
FR1523518A (fr) * 1966-04-11 1968-05-03 Western Electric Co Dispositif acoustique servant à transmettre de l'énergie entre deux circuits d'énergie
US3716808A (en) * 1971-05-20 1973-02-13 Motorola Inc Bandpass filter including monolithic crystal elements with resonating portions selected for symmetrical response
CA1101945A (en) * 1977-04-15 1981-05-26 Henry K. Yee Single side band monolithic crystal filter

Also Published As

Publication number Publication date
EP0009900B1 (de) 1982-12-01
ZA794565B (en) 1980-08-27
US4224586A (en) 1980-09-23
MX148075A (es) 1983-03-10
AU5110079A (en) 1980-04-17
BR7906228A (pt) 1980-07-15
JPS5552624A (en) 1980-04-17
CA1125397A (en) 1982-06-08
EP0009900A1 (de) 1980-04-16
AU524799B2 (en) 1982-10-07
IL58156A (en) 1981-11-30
PH18857A (en) 1985-10-21
AR217203A1 (es) 1980-02-29
IL58156A0 (en) 1979-12-30

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee