Constant impedance line driver with digitally controlled edge rate
US8395411B2 · kind B2 · utility
3Cited by
13References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 8, 2010 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Oct 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0286
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A constant impedance driver provides controlled output slew rates. The driver includes a plurality of buffers, each with an output impedance that is multiple of the output impedance of the driver. Outputs of buffers are coupled in parallel to form the output of the driver. Inputs to the buffers are coupled to an input signal or delayed versions of the input signal. The buffer inputs may be selectively coupled to taps of a delay line to provide selected slew rates on the output of the driver. The buffers may be selectively enabled to change or calibrate the output impedance of the driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.