Parameter control circuit
US8428112B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 2008 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Dec 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03885
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An interface circuit inputting and outputting data and a clock that have multiple speeds is provided with an equalizer capable of changing a circuit parameter, a frequency detection part detecting a clock frequency, and a parameter calculation control part calculating an appropriate circuit parameter according to the clock frequency and controlling the equalizer. The frequency detection part detects at what frequency the interface circuit is operating presently and sends the frequency to the parameter calculation control part. The parameter calculation control part calculates the circuit parameter of the equalizer so that the interface circuit operates optimally at the detected frequency, and sets the circuit parameter to the equalizer. In this manner, since the circuit parameter of the equalizer in the interface circuit can be controlled appropriately according to the frequency of the input and output clock, optimum operation is always available.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.