Phase rotator control test scheme
US7573937B2 · kind B2 · utility
7Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2005 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Feb 24, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/317
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques and apparatus for testing phase rotators for detecting defective tap weights are provided. Phase rotator test logic may include a master phase rotator to cycle the phase of a clock signal distributed to operational phase rotators through an entire cycle of phases (e.g., an entire 360 degree rotation). Each operational phase rotator should respond with an equal but opposite phase shift in order to maintain phase lock. Thus, after sweeping, each tap weight is exercised, which may help ensure defective tap weights in any (e.g., quadrant) are detected during testing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.