JPS56169923A - Digital low-pass filter device - Google Patents

Digital low-pass filter device

Info

Publication number
JPS56169923A
JPS56169923A JP7449280A JP7449280A JPS56169923A JP S56169923 A JPS56169923 A JP S56169923A JP 7449280 A JP7449280 A JP 7449280A JP 7449280 A JP7449280 A JP 7449280A JP S56169923 A JPS56169923 A JP S56169923A
Authority
JP
Japan
Prior art keywords
moving average
filter
signal
average width
input signal
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
JP7449280A
Other languages
Japanese (ja)
Other versions
JPS6340367B2 (en
Inventor
Takashi Omuro
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7449280A priority Critical patent/JPS56169923A/en
Publication of JPS56169923A publication Critical patent/JPS56169923A/en
Publication of JPS6340367B2 publication Critical patent/JPS6340367B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks

Abstract

PURPOSE:To make the filter adaptive, by detecting the period of noise included in an input signal from the differential signal between the input signal and an output signal and adjusting the moving average width of filter automatically. CONSTITUTION:In a digital moving average filter 1 outputting the moving average of a digital input signal, the moving average width being a parameter of a filter is set so that noise detected in any time can effectively be rejected with a delay element 2 to an observed input signal X. Further, a signal XL giving the phase delay of the moving average width to the input signal X is outputted, and a differential signal E with an estimated output signal Y in moving average is inputted to a moving average width automatic tuner 3, and the period of periodic noise is detected from this signal E and the average width is determined so that the digital filter 1 can interrupt the periodic noise. Thus, the moving average width of the adaptive filter can be changed automatically.
JP7449280A 1980-06-03 1980-06-03 Digital low-pass filter device Granted JPS56169923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7449280A JPS56169923A (en) 1980-06-03 1980-06-03 Digital low-pass filter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7449280A JPS56169923A (en) 1980-06-03 1980-06-03 Digital low-pass filter device

Publications (2)

Publication Number Publication Date
JPS56169923A true JPS56169923A (en) 1981-12-26
JPS6340367B2 JPS6340367B2 (en) 1988-08-10

Family

ID=13548844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7449280A Granted JPS56169923A (en) 1980-06-03 1980-06-03 Digital low-pass filter device

Country Status (1)

Country Link
JP (1) JPS56169923A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091711A (en) * 1983-10-26 1985-05-23 Natl Aerospace Lab Filtering digital sample device
JPS6182520A (en) * 1984-09-29 1986-04-26 Toshiba Corp Digital filter circuit
FR2668319A1 (en) * 1990-10-17 1992-04-24 Newport Electronics Inc METHOD FOR MODIFYING RESPONSE TIMES OF A SOFTWARE FILTER
KR100324046B1 (en) * 1993-02-18 2002-06-20 그래햄 이. 테일러 Adaptive index filter, its adjustment method and its use method, control loop and its control method
JP2010003324A (en) * 2009-10-07 2010-01-07 Osaka Prefecture Univ Data prediction device, and data prediction program
JP2010237215A (en) * 2008-04-07 2010-10-21 Seiko Epson Corp Apparatus and method for measurement of frequency
JP2010271211A (en) * 2009-05-22 2010-12-02 Seiko Epson Corp Frequency measuring device
JP2010271210A (en) * 2009-05-22 2010-12-02 Seiko Epson Corp Frequency measuring device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091711A (en) * 1983-10-26 1985-05-23 Natl Aerospace Lab Filtering digital sample device
JPH0256847B2 (en) * 1983-10-26 1990-12-03 Kagaku Gijutsucho Koku Uchu Gijutsu Kenkyushocho
JPS6182520A (en) * 1984-09-29 1986-04-26 Toshiba Corp Digital filter circuit
FR2668319A1 (en) * 1990-10-17 1992-04-24 Newport Electronics Inc METHOD FOR MODIFYING RESPONSE TIMES OF A SOFTWARE FILTER
KR100324046B1 (en) * 1993-02-18 2002-06-20 그래햄 이. 테일러 Adaptive index filter, its adjustment method and its use method, control loop and its control method
JP2010237215A (en) * 2008-04-07 2010-10-21 Seiko Epson Corp Apparatus and method for measurement of frequency
JP2012141313A (en) * 2008-04-07 2012-07-26 Seiko Epson Corp Frequency measurement device and measurement method
JP2010271211A (en) * 2009-05-22 2010-12-02 Seiko Epson Corp Frequency measuring device
JP2010271210A (en) * 2009-05-22 2010-12-02 Seiko Epson Corp Frequency measuring device
JP2010003324A (en) * 2009-10-07 2010-01-07 Osaka Prefecture Univ Data prediction device, and data prediction program

Also Published As

Publication number Publication date
JPS6340367B2 (en) 1988-08-10

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