JPS5580913A - Characteristic setting method for digital filter - Google Patents

Characteristic setting method for digital filter

Info

Publication number
JPS5580913A
JPS5580913A JP15463478A JP15463478A JPS5580913A JP S5580913 A JPS5580913 A JP S5580913A JP 15463478 A JP15463478 A JP 15463478A JP 15463478 A JP15463478 A JP 15463478A JP S5580913 A JPS5580913 A JP S5580913A
Authority
JP
Japan
Prior art keywords
filter
frequency
conversion
digital filter
cut
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
JP15463478A
Other languages
Japanese (ja)
Inventor
Tadamichi Kawasaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15463478A priority Critical patent/JPS5580913A/en
Publication of JPS5580913A publication Critical patent/JPS5580913A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Filters And Equalizers (AREA)

Abstract

PURPOSE:To obtain the digital filters of various filter characteristics by adding some element of a certain type to the filter coefficient. CONSTITUTION:For instance, the frequency conversion formula is shown as Eq. (4) at region Z for conversion of the cut-off frequency of LPF. Here, alpha means the frequency conversion parameter and is shown as Eq. (5), where beta is the cut-off frequency of the prototype filter and omegac is the same cut-off frequency after conversion. Thus if parameter alpha is applied to the circulation-type digital filter of multi-step bicut structure, the transmission function H'[Z] becomes as shown in Eq. (7). With this transmission filter, the digital filter is formed by securing the mutual connection among the adder circuit, the 1-sample delay circuit, the multiplier circuit and the divider circuit each.
JP15463478A 1978-12-15 1978-12-15 Characteristic setting method for digital filter Pending JPS5580913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15463478A JPS5580913A (en) 1978-12-15 1978-12-15 Characteristic setting method for digital filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15463478A JPS5580913A (en) 1978-12-15 1978-12-15 Characteristic setting method for digital filter

Publications (1)

Publication Number Publication Date
JPS5580913A true JPS5580913A (en) 1980-06-18

Family

ID=15588478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15463478A Pending JPS5580913A (en) 1978-12-15 1978-12-15 Characteristic setting method for digital filter

Country Status (1)

Country Link
JP (1) JPS5580913A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147223A (en) * 1982-02-26 1983-09-02 Japan Radio Co Ltd Digital filter
US4467440A (en) * 1980-07-09 1984-08-21 Casio Computer Co., Ltd. Digital filter apparatus with resonance characteristics
JPS6423614A (en) * 1987-07-17 1989-01-26 Sanyo Electric Co Method for constituting low-band digital filter
JP2019502337A (en) * 2015-12-07 2019-01-24 ホアウェイ・テクノロジーズ・カンパニー・リミテッド Audio signal processing apparatus and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467440A (en) * 1980-07-09 1984-08-21 Casio Computer Co., Ltd. Digital filter apparatus with resonance characteristics
JPS58147223A (en) * 1982-02-26 1983-09-02 Japan Radio Co Ltd Digital filter
JPH0113244B2 (en) * 1982-02-26 1989-03-06 Japan Radio Co Ltd
JPS6423614A (en) * 1987-07-17 1989-01-26 Sanyo Electric Co Method for constituting low-band digital filter
JP2019502337A (en) * 2015-12-07 2019-01-24 ホアウェイ・テクノロジーズ・カンパニー・リミテッド Audio signal processing apparatus and method

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