Phase shifter with reduced linear dependency
US7263641B2 · kind B2 · utility
32Cited by
100References
19Claims
0Family size
Inventors
Key dates
| Filing date | Aug 3, 2004 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Nov 10, 2025 |
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.