Off chip driver (OCD) with variable drive capability for noise control
US6014046A · kind A · utility
8Cited by
22References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1997 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Jul 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0013
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An Off Chip Driver (OCD) having a high, a low and a high impedance (Hi-Z) state. The OCD includes an up-level pre-drive, a down-level pre-drive and a driver. The driver mirrors current in the up-level pre-drive and down-level pre-drive. Both pre-drive circuits have an unbalanced input-dependant delay to quickly turn off/on the on and off driver devices and, after a delay, reduce the drive on the turned on device to a steady state level. The delay may have a fixed length set by an inverter chain or may be dependent upon output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.