Apparatus and method for performing eye scan
US7302365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2005 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Aug 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31711
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided a method and apparatus for performing an eye scan. Said apparatus comprises: a receiver for receiving input signals; an equaliser for processing said input signals; a data sampler for sampling said processed input signals at certain sampling points to produce a data output, said data sampler being controlled by a clock signal; an edge sampler for detecting the edges of the processed input signal; an early/late voter for deciding whether a current sampling point needs to be advanced or retarded. The early/late voter passes an Up/Down signal to an interpolator for maintaining said clock signal, said interpolator acting on said Up/Down signal to adjust the clock signal by stepping it forward or backward according to control need, so that said sampling point can be advanced or retarded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.