Common edge output skew detection circuit
US5436908A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1992 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Jun 17, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An output skew detection circuit detects and measures output skew tOSLH, tOSHL between multiple in phase common edge output signals propagated through a multiple signal driver circuit having n outputs. The output skew detection circuit senses common edge output skew across the n in phase output signals simultaneously and directly. A first logic gate has n inputs coupled to the n outputs, detects occurrence of either the first or last of the multiple common edge output signals, and generates a first skew detection edge signal at a first logic gate output. The first and last common edge output signals are the signals propagated with minimum and maximum propagation times tplhmin, tphlmin and tplhmax, tphlmax. A second logic gate has n inputs coupled to the n outputs in parallel with the first logic gate. The second logic gate detects occurrence of the other of the first and last of the multiple common edge output signals and generates a second skew detection edge signal at a second logic gate output. The respective inputs of a third logic gate are coupled to the first and second logic gate outputs. The third logic gate generates a pulse signal having a pulse width or pulse duration de…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.