Apparatus for controlling on-die termination
US7288959B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2006 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Dec 12, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0298
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An on-die termination control unit turns on/off a corresponding transistor according to a code signal and adjusts an on-die termination resistance so it is equal to an external resistance. An offset compensating unit detects an offset voltage from an output voltage of the on-die termination control unit, stores the detected offset voltage in a capacitor, compares the capacitor voltage canceled the offset voltage with a preset reference voltage, and outputs the comparison result. A latch stores the output of the offset compensating unit for a predetermined time. A counter counts the output of the latch and increases or decreases the code signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.