ZQ calibration circuit for multiple interfaces
US12394452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2023 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Nov 9, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/2254
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A ZQ calibration circuit includes: a ZQ controller configured to detect an end of one interface mode, among a plurality of interface modes in which ZQ calibration is supported, and to instruct a switch to another interface mode in response to the one interface mode coming to an end; a ZQ engine configured to generate a first reference voltage corresponding to the one interface mode through a multi-reference voltage generator, to generate a second reference voltage corresponding to the another interface mode in response to the switch to the another interface mode being instructed, to perform the ZQ calibration based on the first reference voltage or the second reference voltage, and to output a calibration code; and a ZQ driver configured to output an output signal through an input/output pad based on the calibration code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.