JPS5516573A - Cyclic variable filter - Google Patents

Cyclic variable filter

Info

Publication number
JPS5516573A
JPS5516573A JP8962378A JP8962378A JPS5516573A JP S5516573 A JPS5516573 A JP S5516573A JP 8962378 A JP8962378 A JP 8962378A JP 8962378 A JP8962378 A JP 8962378A JP S5516573 A JPS5516573 A JP S5516573A
Authority
JP
Japan
Prior art keywords
multiplier
output
adder
variable
supplied
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
JP8962378A
Other languages
Japanese (ja)
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 JP8962378A priority Critical patent/JPS5516573A/en
Publication of JPS5516573A publication Critical patent/JPS5516573A/en
Pending 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
    • H03H17/0294—Variable filters; Programmable filters
    • 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

Abstract

PURPOSE:To reduce greatly variable coefficients in number by separating variable coefficients, corresponding to the center frequency and band width of a passing band, from multipliers determining the basic characteristics of a filter. CONSTITUTION:An input signal of sampling period T from input terminal 21 is added to the output of adder 23 by adder 22. The output of adder 22 is supplied to block 24 and also to adder 26 via multiplier 25 of (a0) in multiplier. The output of block 24 is multiplied by variable multiplier 1/B0 by variable multiplier 27 and the multiplication output is supplied to multiplier 28 of (-b1) in multiplier, block 29 and multiplier 31 of (a1) respectively. The output of block 29 is multiplied by variable multiplier 1/B0 by variable multiplier 32 and then supplied to multiplers 33 of (-b2) and multiplier 34 of (a2). The outputs of them are applied to adders 22, 23 and 35 and the output of adder 26 is supplied to output terminal 36.
JP8962378A 1978-07-21 1978-07-21 Cyclic variable filter Pending JPS5516573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8962378A JPS5516573A (en) 1978-07-21 1978-07-21 Cyclic variable filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8962378A JPS5516573A (en) 1978-07-21 1978-07-21 Cyclic variable filter

Publications (1)

Publication Number Publication Date
JPS5516573A true JPS5516573A (en) 1980-02-05

Family

ID=13975871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8962378A Pending JPS5516573A (en) 1978-07-21 1978-07-21 Cyclic variable filter

Country Status (1)

Country Link
JP (1) JPS5516573A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479362A (en) * 1994-05-31 1995-12-26 Icom Incorporated Digital band pass elliptic filter system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479362A (en) * 1994-05-31 1995-12-26 Icom Incorporated Digital band pass elliptic filter system
US5530660A (en) * 1994-05-31 1996-06-25 Icom Incorporated Digital band pass elliptic filter system

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