JPS5685926A - Digital filter - Google Patents
Digital filterInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5476048A (en) * | 1977-11-30 | 1979-06-18 | Nec Corp | Noncyclic variable filter |
-
1979
- 1979-12-13 JP JP16232579A patent/JPS5685926A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5476048A (en) * | 1977-11-30 | 1979-06-18 | Nec Corp | Noncyclic variable filter |
Cited By (2)
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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