JPS56102111A - Digital filter - Google Patents

Digital filter

Info

Publication number
JPS56102111A
JPS56102111A JP452680A JP452680A JPS56102111A JP S56102111 A JPS56102111 A JP S56102111A JP 452680 A JP452680 A JP 452680A JP 452680 A JP452680 A JP 452680A JP S56102111 A JPS56102111 A JP S56102111A
Authority
JP
Japan
Prior art keywords
transfer function
filter
beta1z
alpha2z
alpha1z
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
JP452680A
Other languages
Japanese (ja)
Other versions
JPH027208B2 (en
Inventor
Yasushi Wakahara
Yoshikazu Ikeda
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP452680A priority Critical patent/JPS56102111A/en
Publication of JPS56102111A publication Critical patent/JPS56102111A/en
Publication of JPH027208B2 publication Critical patent/JPH027208B2/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
    • H03H17/04—Recursive filters

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Complex Calculations (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

PURPOSE:To make it possible to perform operations at an extremely high speed and to minimize operation errors, by giving a prescribed relationship between the coefficient of filter and the coefficient of transfer function and by realizing the transfer function with the filter. CONSTITUTION:When coefficients alphai and betai are defined as alphao=ao, alpha1=a1-a0b1, alpha2=a2-a0b2, beta1=b1 and beta2=b2, transfer function H(Z) as shown by formula I is realized. To calculate output Yn, operation of feedback part of multipliers 48, 49, etc., is made. First of all, alpha1Z<-1>, alpha2Z<-2>, beta1Z<-1>, beta2Z<-2> and alpha0 are operated through multipliers 46-49 and 45. Then, alpha1Z<-1>+alpha2Z<-2> and beta1Z<-1>+beta-2 are operated through adders 20 and 22, and the operation results are obtained by operating adders 21 and 23, and, at the same time, preparation for the operation of next cycle is made. By this, the operation can be made at an extremely high speed, and the operation error can be minimized.
JP452680A 1980-01-21 1980-01-21 Digital filter Granted JPS56102111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP452680A JPS56102111A (en) 1980-01-21 1980-01-21 Digital filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP452680A JPS56102111A (en) 1980-01-21 1980-01-21 Digital filter

Publications (2)

Publication Number Publication Date
JPS56102111A true JPS56102111A (en) 1981-08-15
JPH027208B2 JPH027208B2 (en) 1990-02-16

Family

ID=11586483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP452680A Granted JPS56102111A (en) 1980-01-21 1980-01-21 Digital filter

Country Status (1)

Country Link
JP (1) JPS56102111A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6477310A (en) * 1987-05-29 1989-03-23 Schlumberger Technologies Inc Method of determining transmission coefficient of ac calibrator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6477310A (en) * 1987-05-29 1989-03-23 Schlumberger Technologies Inc Method of determining transmission coefficient of ac calibrator

Also Published As

Publication number Publication date
JPH027208B2 (en) 1990-02-16

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