FR2412204A1 - PERFECTED DOUBLE MONOLITHIC FILTER - Google Patents

PERFECTED DOUBLE MONOLITHIC FILTER

Info

Publication number
FR2412204A1
FR2412204A1 FR7835164A FR7835164A FR2412204A1 FR 2412204 A1 FR2412204 A1 FR 2412204A1 FR 7835164 A FR7835164 A FR 7835164A FR 7835164 A FR7835164 A FR 7835164A FR 2412204 A1 FR2412204 A1 FR 2412204A1
Authority
FR
France
Prior art keywords
filter
monolithic filter
substrate
input
blade
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.)
Withdrawn
Application number
FR7835164A
Other languages
French (fr)
Inventor
Gerald Ewing Roberts
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of FR2412204A1 publication Critical patent/FR2412204A1/en
Withdrawn legal-status Critical Current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
    • H03H9/56—Monolithic crystal filters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

L'INVENTION CONCERNE LES FILTRES PIEZOELECTRIQUES. OUTRE LES ELECTRODES D'ENTREE ET DE SORTIE 11, 13, LA LAME PIEZOELECTRIQUE 10 QUI CONSTITUE LE SUBSTRAT D'UN FILTRE MONOLITHIQUE PORTE DES REVETEMENTS METALLIQUES 32, 42 QUI SONT SITUES PARTIELLEMENT FACE A FACE, DE PART ET D'AUTRE DE LA LAME 10. CES REVETEMENTS CONSTITUENT AVEC LE SUBSTRAT UN CONDENSATEUR BRANCHE ENTRE L'ENTREE ET LA SORTIE DU FILTRE, QUI AMELIORE LA REPONSE EN FREQUENCE DU FILTRE DE PART ET D'AUTRE DE LA BANDE PASSANTE. APPLICATION AUX EMETTEURS-RECEPTEURS PORTATIFS.THE INVENTION CONCERNS PIEZOELECTRIC FILTERS. IN ADDITION TO THE INPUT AND OUTPUT ELECTRODES 11, 13, THE PIEZOELECTRIC BLADE 10 WHICH CONSTITUTES THE SUBSTRATE OF A MONOLITHIC FILTER WEAR METAL COATINGS 32, 42 WHICH ARE LOCATED PARTLY FACE TO FACE, ON EACH OTHER OF THE BLADE 10. THESE COATINGS CONSTITUTE WITH THE SUBSTRATE A CONDENSER CONNECTED BETWEEN THE INPUT AND OUTPUT OF THE FILTER, WHICH IMPROVES THE FREQUENCY RESPONSE OF THE FILTER ON EACH OTHER OF THE BANDWIDTH. APPLICATION TO PORTABLE TRANSMITTERS.

FR7835164A 1977-12-14 1978-12-14 PERFECTED DOUBLE MONOLITHIC FILTER Withdrawn FR2412204A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86033777A 1977-12-14 1977-12-14

Publications (1)

Publication Number Publication Date
FR2412204A1 true FR2412204A1 (en) 1979-07-13

Family

ID=25332987

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7835164A Withdrawn FR2412204A1 (en) 1977-12-14 1978-12-14 PERFECTED DOUBLE MONOLITHIC FILTER

Country Status (4)

Country Link
JP (1) JPS5496944A (en)
DE (1) DE2853834A1 (en)
FR (1) FR2412204A1 (en)
GB (1) GB2010624A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5643813A (en) * 1979-09-18 1981-04-22 Matsushita Electric Ind Co Ltd Quartz oscillator
JP3125454B2 (en) * 1992-07-07 2001-01-15 株式会社村田製作所 Three-terminal type piezoelectric resonator
US5446335A (en) * 1993-02-19 1995-08-29 Murata Mfg. Co., Ltd. Piezoresonator with a built-in capacitor and a manufacturing method thereof

Also Published As

Publication number Publication date
DE2853834A1 (en) 1979-06-21
JPS5496944A (en) 1979-07-31
GB2010624A (en) 1979-06-27

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Legal Events

Date Code Title Description
ST Notification of lapse