Apparatus and method for controlling delay stage of off-chip driver
US8098083B2 · kind B2 · utility
2Cited by
5References
3Claims
0Family size
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Key dates
| Filing date | Apr 2, 2009 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Sep 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00143
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multiple-finger off-chip driver (OCD) uses delay between branches of the output stage. The delay between branches is controlled using bias circuitry which compensates for process, temperature, and voltage (PVT) variations, resulting in less variation of slew rate at the output of the OCD. The OCD includes a time domain delay stage; a pre-driver stage; a final driver stage; and a bias circuit, for providing bias voltages to the time domain stage that compensate for process, temperature and voltage (PVT) variations on the time domain stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.