JPS644111A - Digital filter circuit - Google Patents
Digital filter circuitInfo
- Publication number
- JPS644111A JPS644111A JP15872587A JP15872587A JPS644111A JP S644111 A JPS644111 A JP S644111A JP 15872587 A JP15872587 A JP 15872587A JP 15872587 A JP15872587 A JP 15872587A JP S644111 A JPS644111 A JP S644111A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- digital filter
- constitution
- zero point
- component
- 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
Links
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To simplify the circuit constitution and stable operation by eliminating a DC component caused by the round-off processing for the result of arithmetic operation implemented in a digital filter of a pre-stage by means of a digital filter of the post-stage. CONSTITUTION:A prescribed input signal to be subjected to filtering is given to a 1st digital filter 1 having a prescribed trasnfer function Ha(Z<-1>) and the processing rounding off the result of arithmetic operation to the required bit number is implemented in this filter 1. Then the output of the 1st filter 1 has a transfer function of (1-Z<-1>) and given to a 2nd filter 2 having a characteristic where a zero point of level amplitude level, so-called zero point, at a zero point of frequency zero and the DC component is eliminated in the filter 2. Through the constitution above, since it is not required to eliminate the DC component by using the rounding quantization making the circuit constitution complicated, the operation is made stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15872587A JPS644111A (en) | 1987-06-25 | 1987-06-25 | Digital filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15872587A JPS644111A (en) | 1987-06-25 | 1987-06-25 | Digital filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS644111A true JPS644111A (en) | 1989-01-09 |
Family
ID=15677973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15872587A Pending JPS644111A (en) | 1987-06-25 | 1987-06-25 | Digital filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS644111A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5210709A (en) * | 1991-05-08 | 1993-05-11 | Matsushita Electric Industrial Co., Ltd. | Digital filter for removing dc components |
| KR20170010060A (en) | 2015-01-15 | 2017-01-25 | 파나소닉 아이피 매니지먼트 가부시키가이샤 | Vacuum thermal insulation material |
-
1987
- 1987-06-25 JP JP15872587A patent/JPS644111A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5210709A (en) * | 1991-05-08 | 1993-05-11 | Matsushita Electric Industrial Co., Ltd. | Digital filter for removing dc components |
| KR20170010060A (en) | 2015-01-15 | 2017-01-25 | 파나소닉 아이피 매니지먼트 가부시키가이샤 | Vacuum thermal insulation material |
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