Phase shifter with reduced linear dependency
US6874109B1 · kind B1 · utility
61Cited by
75References
47Claims
0Family size
Inventors
Key dates
| Filing date | Nov 15, 2000 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Dec 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/318594
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for the automated synthesis of phase shifters. Phase shifters comprise circuits used to remove effects of structural dependencies featured by pseudo-random test pattern generators driving parallel scan chains. Using a concept of duality, the method relates the logical states of linear feedback shift registers (LFSRs) and circuits spacing their inputs to each of the output channels. The method generates a phase shifter network balancing the loads of successive stages of LFSRs and satisfying criteria of reduced linear dependency, channel separation and circuit complexity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.