Pulse width measurement technique
US5122978A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1989 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Nov 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3016
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus are disclosed for measuring the clock pulse width as it is received at a subject latch point in a system. In the system, test data distribution means is provided for distributing a test data signal from a test data source point to the data input of the subject latch point. The subject latch point is constructed to hold on its output the signal which was on the data input at selectably either the leading or trailing edge of the clock pulse. By adjusting the presettable delay in a test data signal generator, and observing the steady state output of the subject latch point conveniently after the last clock pulse in a burst reaches the subject latch point, it is possible to determine a delay setting at which the test data signal transition and the selected edge of the last clock pulse in the burst reach the subject latch point at substantially the same time. Using this method, two measurements are taken. The first measurement is obtained with the leading edge of each clock pulse selected as the effective edge for the subject latch point, and the second measurement is obtained with the trailing edge of each clock pulse selected as the effective edge for the subject …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.