ZA794565B - 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
ZA794565B
ZA794565B ZA00794565A ZA794565A ZA794565B ZA 794565 B ZA794565 B ZA 794565B ZA 00794565 A ZA00794565 A ZA 00794565A ZA 794565 A ZA794565 A ZA 794565A ZA 794565 B ZA794565 B ZA 794565B
Authority
ZA
South Africa
Prior art keywords
passband
symmetrical
center frequency
crystal filter
monolithic crystal
Prior art date
Application number
ZA00794565A
Other languages
English (en)
Inventor
R Loving
R Kamin
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
Publication of ZA794565B publication Critical patent/ZA794565B/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; 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)
ZA00794565A 1978-10-10 1979-08-29 A monolithic crystal filter having a passband symmetrical about a center frequency ZA794565B (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
ZA794565B true ZA794565B (en) 1980-08-27

Family

ID=25490099

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00794565A ZA794565B (en) 1978-10-10 1979-08-29 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
FR1523518A (fr) * 1966-04-11 1968-05-03 Western Electric Co Dispositif acoustique servant à transmettre de l'énergie entre deux circuits d'énergie
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
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
AU524799B2 (en) 1982-10-07
MX148075A (es) 1983-03-10
AU5110079A (en) 1980-04-17
IL58156A0 (en) 1979-12-30
EP0009900A1 (de) 1980-04-16
AR217203A1 (es) 1980-02-29
PH18857A (en) 1985-10-21
IL58156A (en) 1981-11-30
US4224586A (en) 1980-09-23
DE2964149D1 (en) 1983-01-05
BR7906228A (pt) 1980-07-15
CA1125397A (en) 1982-06-08
EP0009900B1 (de) 1982-12-01
JPS5552624A (en) 1980-04-17

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