JPH0728788Y2 - Dtmf信号の検出回路 - Google Patents
Dtmf信号の検出回路Info
- Publication number
- JPH0728788Y2 JPH0728788Y2 JP13461189U JP13461189U JPH0728788Y2 JP H0728788 Y2 JPH0728788 Y2 JP H0728788Y2 JP 13461189 U JP13461189 U JP 13461189U JP 13461189 U JP13461189 U JP 13461189U JP H0728788 Y2 JPH0728788 Y2 JP H0728788Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- dtmf
- detection circuit
- oscillation
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 title claims description 30
- 230000010355 oscillation Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13461189U JPH0728788Y2 (ja) | 1989-11-20 | 1989-11-20 | Dtmf信号の検出回路 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13461189U JPH0728788Y2 (ja) | 1989-11-20 | 1989-11-20 | Dtmf信号の検出回路 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0373090U JPH0373090U (en:Method) | 1991-07-23 |
| JPH0728788Y2 true JPH0728788Y2 (ja) | 1995-06-28 |
Family
ID=31681937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13461189U Expired - Lifetime JPH0728788Y2 (ja) | 1989-11-20 | 1989-11-20 | Dtmf信号の検出回路 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0728788Y2 (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327364A (ja) * | 2001-05-02 | 2002-11-15 | Unitika Ltd | 生分解性ヘッドレストカバー |
| JP5919772B2 (ja) * | 2011-12-01 | 2016-05-18 | 日本電気株式会社 | Dtmf信号検出装置、方法及びプログラム |
-
1989
- 1989-11-20 JP JP13461189U patent/JPH0728788Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0373090U (en:Method) | 1991-07-23 |
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