JPS57154924A - Ideal filter - Google Patents

Ideal filter

Info

Publication number
JPS57154924A
JPS57154924A JP4021881A JP4021881A JPS57154924A JP S57154924 A JPS57154924 A JP S57154924A JP 4021881 A JP4021881 A JP 4021881A JP 4021881 A JP4021881 A JP 4021881A JP S57154924 A JPS57154924 A JP S57154924A
Authority
JP
Japan
Prior art keywords
frequency
sin8khz
sin2khz
10khz
equation
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
JP4021881A
Other languages
Japanese (ja)
Inventor
Michiro Murayama
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP4021881A priority Critical patent/JPS57154924A/en
Publication of JPS57154924A publication Critical patent/JPS57154924A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/34—Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source

Abstract

PURPOSE:To obtain a filter having sudden characteristics with no rotation of the phase, by dividing the signal frequency into the low and high frequencies on the basis of a certain frequency. CONSTITUTION:It is supposed that the signal to be applied to a filter is set at sin18kHz+sin8kHz and then divided on the bases of the 10kHz central frequency. If the SSB wave is produced on the basis of 10kHz, sin8kHz-sin2kHz... (I) and cos8kHz-cos2kHz...(II) are obtained. When the phase is shifted by pi/ 2 for the equation (II), -sin8kHz-sin2kHz...(III) is obtained. Then the addition/ subtraction is applied to the equations (I) and (III) to obtain a high frequency component of sin88kHz and a low frequency component of sin2kHz, respectively. These components are set back to the original frequencies by means of the central frequency 10kHz to obtain a high frequency of sin18kHz from the equation (IV) and a low frequency of sin8kHz from the equation (V) respectively.
JP4021881A 1981-03-19 1981-03-19 Ideal filter Pending JPS57154924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4021881A JPS57154924A (en) 1981-03-19 1981-03-19 Ideal filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4021881A JPS57154924A (en) 1981-03-19 1981-03-19 Ideal filter

Publications (1)

Publication Number Publication Date
JPS57154924A true JPS57154924A (en) 1982-09-24

Family

ID=12574627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4021881A Pending JPS57154924A (en) 1981-03-19 1981-03-19 Ideal filter

Country Status (1)

Country Link
JP (1) JPS57154924A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02258317A (en) * 1989-03-31 1990-10-19 Nitta Ind Corp Method for coating outer circumference of antiseismic device for building

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02258317A (en) * 1989-03-31 1990-10-19 Nitta Ind Corp Method for coating outer circumference of antiseismic device for building

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