JPS5685926A - Digital filter - Google Patents

Digital filter

Info

Publication number
JPS5685926A
JPS5685926A JP16232579A JP16232579A JPS5685926A JP S5685926 A JPS5685926 A JP S5685926A JP 16232579 A JP16232579 A JP 16232579A JP 16232579 A JP16232579 A JP 16232579A JP S5685926 A JPS5685926 A JP S5685926A
Authority
JP
Japan
Prior art keywords
stop
frequency
alpha
output
adder
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
JP16232579A
Other languages
Japanese (ja)
Other versions
JPS6320050B2 (en
Inventor
Kensaku Fujii
Shiro Kikuchi
Masaharu Kawaguchi
Akira Fukui
Kojiro Sakurai
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon Electric Co 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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP16232579A priority Critical patent/JPS5685926A/en
Publication of JPS5685926A publication Critical patent/JPS5685926A/en
Publication of JPS6320050B2 publication Critical patent/JPS6320050B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To obtain a digital band-stop filter which can adjust the stop frequency freely, by constituting it of two delaying circuits having the NT delay time, a multiplier and two adders, in case when an integer except zero and a sampling period are denated cs N and T, respectively. CONSTITUTION:The outputs of the delaying circuits 3-1, 3-2 of the delay time NT, and the input signals are added by the adder 4. Also, the output of the circuit 3-1 is multiplied by the constant + or -alpha from the external part by the multiplier 5, and its output and the output of the adder 4 are added or subtracted by the adder 6, and the result is output to the terminal 2. The frequency characteristic of this circuit becomes 2cosNomegaT+ or -alpha(omega: angular frequency), and the stop angular frequency becomes omega=(2k-1)pi/NT(k=1, 2...). When alpha is selected and adjusted near to zero, the stop frequency can be finely adjusted, and when alpha is selected approximate to 2, the band frequency filter having a ripple in the stop band can be realized easily.
JP16232579A 1979-12-13 1979-12-13 Digital filter Granted JPS5685926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16232579A JPS5685926A (en) 1979-12-13 1979-12-13 Digital filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16232579A JPS5685926A (en) 1979-12-13 1979-12-13 Digital filter

Publications (2)

Publication Number Publication Date
JPS5685926A true JPS5685926A (en) 1981-07-13
JPS6320050B2 JPS6320050B2 (en) 1988-04-26

Family

ID=15752382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16232579A Granted JPS5685926A (en) 1979-12-13 1979-12-13 Digital filter

Country Status (1)

Country Link
JP (1) JPS5685926A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946370A (en) * 1982-09-08 1984-03-15 Daihatsu Motor Co Ltd Compression ratio variable type internal-combustion engine
JPS5994986A (en) * 1982-10-06 1984-05-31 アイテイ−テイ−・インダストリ−ズ・インコ−ポレ−テツド Chroma signal integrated digital filter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5476048A (en) * 1977-11-30 1979-06-18 Nec Corp Noncyclic variable filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5476048A (en) * 1977-11-30 1979-06-18 Nec Corp Noncyclic variable filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946370A (en) * 1982-09-08 1984-03-15 Daihatsu Motor Co Ltd Compression ratio variable type internal-combustion engine
JPS5994986A (en) * 1982-10-06 1984-05-31 アイテイ−テイ−・インダストリ−ズ・インコ−ポレ−テツド Chroma signal integrated digital filter

Also Published As

Publication number Publication date
JPS6320050B2 (en) 1988-04-26

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