JPS6447118A - Minimum pulse width check circuit - Google Patents
Minimum pulse width check circuitInfo
- Publication number
- JPS6447118A JPS6447118A JP62203155A JP20315587A JPS6447118A JP S6447118 A JPS6447118 A JP S6447118A JP 62203155 A JP62203155 A JP 62203155A JP 20315587 A JP20315587 A JP 20315587A JP S6447118 A JPS6447118 A JP S6447118A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- test
- clock
- pulse width
- output
- 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
Abstract
PURPOSE:To detect a defective FF by inputting a test pulse for setting or resetting the FF and varying the phase of the pulse and that of a clock pulse so as to form the contention state and comparing the result with that of a nondefective FF. CONSTITUTION:In inputting a pulse to a clock terminal CLK and a test input terminal RSET 0, a test pulse is given from an output Q of the FF 2 to a FF 1, which is reset. The phase of the clock pulse of the FF 1 and that of the test pulse are varied from this state to form the state where the clock pulse and the test pulse is in contention. Then a check pattern of the output of a nondefective FF when the test pulse is inputted thereto is formed and the pattern is compared with a pattern of the output Q of an FF being an object of inspection. Thus, FFs whose minimum pulse width for setting or resetting is deteriorated are detected and they can be excluded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62203155A JPS6447118A (en) | 1987-08-17 | 1987-08-17 | Minimum pulse width check circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62203155A JPS6447118A (en) | 1987-08-17 | 1987-08-17 | Minimum pulse width check circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6447118A true JPS6447118A (en) | 1989-02-21 |
Family
ID=16469341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62203155A Pending JPS6447118A (en) | 1987-08-17 | 1987-08-17 | Minimum pulse width check circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6447118A (en) |
-
1987
- 1987-08-17 JP JP62203155A patent/JPS6447118A/en active Pending
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