JPS54134954A - Variable attenuating equalizer - Google Patents

Variable attenuating equalizer

Info

Publication number
JPS54134954A
JPS54134954A JP4359078A JP4359078A JPS54134954A JP S54134954 A JPS54134954 A JP S54134954A JP 4359078 A JP4359078 A JP 4359078A JP 4359078 A JP4359078 A JP 4359078A JP S54134954 A JPS54134954 A JP S54134954A
Authority
JP
Japan
Prior art keywords
aok
equalizer
numerator
multipliers
here
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
JP4359078A
Other languages
Japanese (ja)
Other versions
JPS623609B2 (en
Inventor
Kenji Nakayama
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4359078A priority Critical patent/JPS54134954A/en
Publication of JPS54134954A publication Critical patent/JPS54134954A/en
Publication of JPS623609B2 publication Critical patent/JPS623609B2/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

Abstract

PURPOSE:To obtain a variable attenuating aqualizer of simple circuit constitution. CONSTITUTION:In general, the transfer function of a variable equalizer is expressed by H(Z)=H0 [1-KF(Z)]/[1+KF(Z)]. Here, it is provided that Z is equal to e<jwt> and F(Z) is a rational function of (Z). The attenuation factor, which is proportion to the real number field of F(Z), can be veried by varying proportion coefficient K. Transforming the above equation results in H(Z)=Ho[1+{(-2aoK)/ (1+aoK)+ (-2KF1(Z))/(1+aoK)}/{1+(KF1(Z)/(1+aoK)}]. Here, ao is the constant term of the numerator of F(Z), and any constant term of F1(Z) is not included in the numerator of F1(Z). This equation is realized by multiplier 11 of coefficient Ho, adder 21, block 6 realizing transfer function F1(Z), and multipliers 51 to 54 of coefficients K/(1+aoK), -2ao, -1, and -2. Block 6 consists of delay units 61 and 62, multipliers 63 to 66, and adders 67 and 68.
JP4359078A 1978-04-12 1978-04-12 Variable attenuating equalizer Granted JPS54134954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4359078A JPS54134954A (en) 1978-04-12 1978-04-12 Variable attenuating equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4359078A JPS54134954A (en) 1978-04-12 1978-04-12 Variable attenuating equalizer

Publications (2)

Publication Number Publication Date
JPS54134954A true JPS54134954A (en) 1979-10-19
JPS623609B2 JPS623609B2 (en) 1987-01-26

Family

ID=12667997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4359078A Granted JPS54134954A (en) 1978-04-12 1978-04-12 Variable attenuating equalizer

Country Status (1)

Country Link
JP (1) JPS54134954A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123260A (en) * 1991-10-28 1992-06-23 Wilshire Corporation Thrust bearing for auger type ice maker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200091624A (en) * 2019-01-23 2020-07-31 삼성메디슨 주식회사 Ultrasound diagnostic apparatus and method for operating the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6113654A (en) * 1984-06-29 1986-01-21 Toshiba Corp Electronic parts

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6113654A (en) * 1984-06-29 1986-01-21 Toshiba Corp Electronic parts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123260A (en) * 1991-10-28 1992-06-23 Wilshire Corporation Thrust bearing for auger type ice maker

Also Published As

Publication number Publication date
JPS623609B2 (en) 1987-01-26

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