Techniques and circuitry for accurately sampling high frequency data signals input to an integrated circuit
US6292116A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | May 16, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M9/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques and circuitry are provided to handle high frequency input data. The techniques and circuitry take a high-frequency serial input data stream and covert it into parallel form for handling within the integrated circuit. The circuitry ensures the high frequency data is strobed properly by accounting for skew between the high frequency data input and clock input. In an implementation, multiple clock strobes are generated having the same frequency but different phase. A predetermined series of bits is input to the high frequency input into the circuitry for training. One of the multiple clock strobes is selected based on which one correctly determines the bits in the predetermined input data stream. This clock strobe is selected to strobe the high frequency data input for the integrated circuit. In an embodiment, the high frequency data input is an LVDS input of a programmable logic integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.