JPH02130049U - - Google Patents
Info
- Publication number
- JPH02130049U JPH02130049U JP3620789U JP3620789U JPH02130049U JP H02130049 U JPH02130049 U JP H02130049U JP 3620789 U JP3620789 U JP 3620789U JP 3620789 U JP3620789 U JP 3620789U JP H02130049 U JPH02130049 U JP H02130049U
- Authority
- JP
- Japan
- Prior art keywords
- converter
- converts
- signal
- digital signal
- analog signal
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Analogue/Digital Conversion (AREA)
- Complex Calculations (AREA)
Description
第１，２，３図は本考案を実施した関数発生器
の構成ブロツク図、第４図は従来の関数発生器の
構成ブロツク図である。
１……Ａ／Ｄ変換器、２……折線近似処理部、
３……Ｄ／Ａ変換器、２１……ｎ次多項式演算部
、２２……ｎ次ラグランジユ補間処理部、２３…
…ｎ次スプライン補間処理部。
1, 2, and 3 are block diagrams of a function generator embodying the present invention, and FIG. 4 is a block diagram of a conventional function generator. 1... A/D converter, 2... Broken line approximation processing section,
3... D/A converter, 21... n-th order polynomial calculation unit, 22... n-th order Lagrange interpolation processing unit, 23...
...N-th spline interpolation processing unit.
Claims (1)
変換するＡ／Ｄ変換器と、得られたデイジタル信
号ｘについてｎ次多項式、 ｙ＝ａ０＋ａ１ｘ＋ａ２ｘ２＋…＋ａｎｘｎ を用いて必要な関数の特性に応じて係数ａ０，ａ
１，ａ２，…，ａｎを決定し前記デイジタル信号
を演算するｎ次多項式演算部と、このｎ次多項式
演算部の出力ｙをアナログ信号に変換するＤ／Ａ
変換器とからなる関数発生器。 (2) アナログ信号を入力してデイジタル信号に
変換するＡ／Ｄ変換器と、得られたデイジタル信
号ｘについて ｙ＝Ｐｎ（ｘ） （但し、Ｐｎ（ｘ）はラグランジユのｎ次補間式
であり、 Ｐｎ（ｘ）＝ΣＬｉ（ｘ）ｙｉ を用いて前記デイジタル信号の補間信号を発生す
るｎ次ラグランジユ補間処理部と、このｎ次ラグ
ランジユ補間処理部の出力ｙをアナログ信号に変
換するＤ／Ａ変換器とからなる関数発生器。 (3) アナログ信号を入力してデイジタル信号に
変換するＡ／Ｄ変換器と、得られたデイジタル信
号についてｎ次のスプライン補間を用いてデイジ
タル信号の補間信号を発生するｎ次スプライン補
間処理部と、このｎ次スプライン補間処理部の出
力をアナログ信号に変換するＤ／Ａ変換器とから
なる関数発生器。[Claims for Utility Model Registration] (1) An A/D converter that inputs an analog signal and converts it into a digital signal, and the n-th degree polynomial for the obtained digital signal x, y=a 0 +a 1 x+a 2 x 2 +...+a n x n to calculate the coefficients a 0 and a according to the characteristics of the required function.
1 , a 2 , ..., a n and a D/A that converts the output y of the n-th polynomial into an analog signal.
A function generator consisting of a converter. (2) Regarding the A/D converter that inputs an analog signal and converts it into a digital signal, and the obtained digital signal x, y=P n (x) (where, P n (x) is Lagrange's n-th interpolation formula and an n-th Lagrange interpolation processor that generates an interpolation signal of the digital signal using P n (x)=ΣLi(x)yi, and converts the output y of the n-th Lagrange interpolation processor into an analog signal. A function generator consisting of a D/A converter. (3) An A/D converter that inputs an analog signal and converts it into a digital signal, and an A function generator consisting of an n-th spline interpolation processor that generates an interpolation signal, and a D/A converter that converts the output of the n-th spline interpolation processor into an analog signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3620789U JPH02130049U (en) | 1989-03-29 | 1989-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3620789U JPH02130049U (en) | 1989-03-29 | 1989-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02130049U true JPH02130049U (en) | 1990-10-26 |
Family
ID=31542239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3620789U Pending JPH02130049U (en) | 1989-03-29 | 1989-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02130049U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275906A (en) * | 2005-03-30 | 2006-10-12 | Kumamoto Univ | Leakage inspection method and system |
-
1989
- 1989-03-29 JP JP3620789U patent/JPH02130049U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275906A (en) * | 2005-03-30 | 2006-10-12 | Kumamoto Univ | Leakage inspection method and system |
| JP4512827B2 (en) * | 2005-03-30 | 2010-07-28 | 国立大学法人 熊本大学 | Leakage inspection method and apparatus |