JPS5784609A - Reed filter - Google Patents

Reed filter

Info

Publication number
JPS5784609A
JPS5784609A JP16177980A JP16177980A JPS5784609A JP S5784609 A JPS5784609 A JP S5784609A JP 16177980 A JP16177980 A JP 16177980A JP 16177980 A JP16177980 A JP 16177980A JP S5784609 A JPS5784609 A JP S5784609A
Authority
JP
Japan
Prior art keywords
filter
oscillation
reed
noise voltage
input
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.)
Granted
Application number
JP16177980A
Other languages
Japanese (ja)
Other versions
JPS637484B2 (en
Inventor
Kazuo Takayama
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.)
Denso Ten Ltd
Original Assignee
Denso Ten Ltd
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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP16177980A priority Critical patent/JPS5784609A/en
Publication of JPS5784609A publication Critical patent/JPS5784609A/en
Publication of JPS637484B2 publication Critical patent/JPS637484B2/ja
Granted 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 elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/545—Filters comprising resonators of piezoelectric or electrostrictive material including active elements

Landscapes

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

Abstract

PURPOSE:To reject noise voltage based on mechanical oscillation from an output signal and to avoid malfunction, by synthesizing an input signal and an output signal of a reed filter. CONSTITUTION:Resistors R3=R4 are connected so that the input IN and the output OUT of a reed filter LF fitted with a piezoelectric element at both legs of a tuning fork can be synthesized. In this case, since noise voltage due to oscillation is synthesized at opposite phase, no output appears. In this circuit, the noise voltage is cancelled and a function to cancel the output OUT to the input IN is provided at the resonance frequency, the filter acts like a band erasing filter. With this constitution, the malfunction due to oscillation can be prevented without losing the features of the reed filter having high Q value, and the filter can be effective when it is applied to devices mounted on a car influenced by much mechanical oscillation.
JP16177980A 1980-11-17 1980-11-17 Reed filter Granted JPS5784609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16177980A JPS5784609A (en) 1980-11-17 1980-11-17 Reed filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16177980A JPS5784609A (en) 1980-11-17 1980-11-17 Reed filter

Publications (2)

Publication Number Publication Date
JPS5784609A true JPS5784609A (en) 1982-05-27
JPS637484B2 JPS637484B2 (en) 1988-02-17

Family

ID=15741740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16177980A Granted JPS5784609A (en) 1980-11-17 1980-11-17 Reed filter

Country Status (1)

Country Link
JP (1) JPS5784609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151672A (en) * 1989-12-14 1992-09-29 Murata Manufacturing Co. Trap circuit comprising plural piezoelectric resonators interconnected by plural resistors and an inductor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06335877A (en) * 1993-05-27 1994-12-06 Agency Of Ind Science & Technol Vacuum suction device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151672A (en) * 1989-12-14 1992-09-29 Murata Manufacturing Co. Trap circuit comprising plural piezoelectric resonators interconnected by plural resistors and an inductor

Also Published As

Publication number Publication date
JPS637484B2 (en) 1988-02-17

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