JPS5564417A - Mechanical filter - Google Patents

Mechanical filter

Info

Publication number
JPS5564417A
JPS5564417A JP13856378A JP13856378A JPS5564417A JP S5564417 A JPS5564417 A JP S5564417A JP 13856378 A JP13856378 A JP 13856378A JP 13856378 A JP13856378 A JP 13856378A JP S5564417 A JPS5564417 A JP S5564417A
Authority
JP
Japan
Prior art keywords
input
mechanical filter
filter
parallel
output
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.)
Pending
Application number
JP13856378A
Other languages
Japanese (ja)
Inventor
Tamio Yamada
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments 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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP13856378A priority Critical patent/JPS5564417A/en
Publication of JPS5564417A publication Critical patent/JPS5564417A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PURPOSE:To simplify input-output matching by allowing the input-output transformer of a mechanical filter to resonate in parallel at the center frequency of the filter. CONSTITUTION:A mechanical filter is equivalently constituted by connecting capacitor Ce of a piezoelectric element in parallel to a LC circuit with chebyshev characteristics. An input-output transformer can be expressed by inductance component Le. For the purpose, capacitor Ce and inductance Le are enabled by setting to resonate in parallel at the center frequency of the mechanical filter. Even when capacitor Ce and input-output impedance of the piezoelectric element are freely selected, inductance component Le and winding ration (n) of the transformer are adequately set, so that input-output matching can easily be attained without deteriorating filter characteristics.
JP13856378A 1978-11-10 1978-11-10 Mechanical filter Pending JPS5564417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13856378A JPS5564417A (en) 1978-11-10 1978-11-10 Mechanical filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13856378A JPS5564417A (en) 1978-11-10 1978-11-10 Mechanical filter

Publications (1)

Publication Number Publication Date
JPS5564417A true JPS5564417A (en) 1980-05-15

Family

ID=15225058

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13856378A Pending JPS5564417A (en) 1978-11-10 1978-11-10 Mechanical filter

Country Status (1)

Country Link
JP (1) JPS5564417A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01114111A (en) * 1987-10-27 1989-05-02 Yokogawa Electric Corp Mechanical filter
JPH0252514A (en) * 1988-08-17 1990-02-22 Yokogawa Electric Corp Mechanical filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01114111A (en) * 1987-10-27 1989-05-02 Yokogawa Electric Corp Mechanical filter
JPH0252514A (en) * 1988-08-17 1990-02-22 Yokogawa Electric Corp Mechanical filter

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