System and method of eliminating on-board calibration resistor for on-die termination
US9000800B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2012 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Jun 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0278
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system for calibrating impedance of an input/output (I/O) buffer on a semiconductor die includes: the I/O buffer; a temperature sensor on the semiconductor die; and a supply sensor on the semiconductor die. The temperature sensor is configured to acquire temperature information for calibrating the I/O buffer. The supply sensor is configured to acquire voltage information for calibrating the I/O buffer. The I/O buffer comprises: a memory component coupled to the temperature and supply sensors and configured to store the acquired temperature or voltage information; a logic component coupled to the memory component; and a driver with driver legs. The driver is coupled to the logic component. The logic component is configured to generate driver control signals representing an on/off configuration for the driver legs of the driver based at least in part on the acquired temperature information or the acquired voltage information stored in the memory component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.