JPH0397675U - - Google Patents
Info
- Publication number
- JPH0397675U JPH0397675U JP592190U JP592190U JPH0397675U JP H0397675 U JPH0397675 U JP H0397675U JP 592190 U JP592190 U JP 592190U JP 592190 U JP592190 U JP 592190U JP H0397675 U JPH0397675 U JP H0397675U
- Authority
- JP
- Japan
- Prior art keywords
- output
- logical product
- product means
- frequency divider
- logical
- 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
Landscapes
- Electric Clocks (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Description
第１図はこの考案の実施例を示すブロツク図、
第２図はその動作例を示すタイムチヤート、第３
図はこの考案の他の実施例を示すブロツク図であ
る。
Figure 1 is a block diagram showing an embodiment of this invention.
Figure 2 is a time chart showing an example of its operation, and Figure 3 is a time chart showing an example of its operation.
The figure is a block diagram showing another embodiment of this invention.
Claims (1)
分周器と、 基準クロツク信号を発生する基準発振器と、 上記基準クロツク信号と上記分周器の出力との
論理積をとる第１論理積手段と、 上記基準クロツク信号と、上記被測定信号と、
上記分周器の出力との論理積をとる第２論理積手
段と、 上記第１論理積手段の出力と、上記第２論理積
手段の出力とを切替えて取出すスイツチ手段と、 そのスイツチ手段により取出された上記第１論
理積手段の出力及び上記第２論理積手段の出力を
それぞれ上記分周器の出力の半周期の間計数する
計数器と、 その計数器で計数された上記第１論理積手段の
出力の値に対する上記第２論理積手段の出力の値
の比を演算する演算手段と、 を具備するパルスのデイテイ比測定器。[Claims for Utility Model Registration] A frequency divider to which a signal under test is supplied and divides its frequency; a reference oscillator that generates a reference clock signal; and logic between the reference clock signal and the output of the frequency divider. a first logical product means for taking a product; the reference clock signal; and the signal under test;
a second logical product means for performing a logical product with the output of the frequency divider; a switch means for switching and outputting the output of the first logical product means and the output of the second logical product means; a counter that counts the extracted outputs of the first logical product means and the second logical product means for a half period of the output of the frequency divider; and the first logical device counted by the counter. A pulse date ratio measuring device, comprising: arithmetic means for calculating the ratio of the output value of the second logical product means to the value of the output of the product means;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP592190U JPH0745025Y2 (en) | 1990-01-24 | 1990-01-24 | Pulse duty ratio measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP592190U JPH0745025Y2 (en) | 1990-01-24 | 1990-01-24 | Pulse duty ratio measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0397675U true JPH0397675U (en) | 1991-10-08 |
| JPH0745025Y2 JPH0745025Y2 (en) | 1995-10-11 |
Family
ID=31509608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP592190U Expired - Fee Related JPH0745025Y2 (en) | 1990-01-24 | 1990-01-24 | Pulse duty ratio measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745025Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019007886A (en) * | 2017-06-27 | 2019-01-17 | ラピスセミコンダクタ株式会社 | Duty cycle detection circuit and duty cycle detection method |
-
1990
- 1990-01-24 JP JP592190U patent/JPH0745025Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019007886A (en) * | 2017-06-27 | 2019-01-17 | ラピスセミコンダクタ株式会社 | Duty cycle detection circuit and duty cycle detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745025Y2 (en) | 1995-10-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |