Programmable impedance control circuit and method thereof
US6429679B1 · kind B1 · utility
31Cited by
8References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2001 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | May 10, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable impedance control circuit for detecting a characteristic impedance of transmission line to thereby output it to an output driver and on-chip terminator in a semiconductor device. Particularly the circuit serves to control an internal impedance according to a controlled, programmable protocol irrespective of the changes in an external impedance due to factors such as voltage and temperature after an initial internal impedance is set during a locking operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.