| US 8,358,156 B1 | ||
| Voltage mode line driver and pre-emphasis circuit | ||
| Khaldoon S. Abugharbieh, San Jose, Calif. (US); and Mark J. Marlett, Livermore, Calif. (US) | ||
| Assigned to Xilinx, Inc., San Jose, Calif. (US) | ||
| Filed by Khaldoon S. Abugharbieh, San Jose, Calif. (US); and Mark J. Marlett, Livermore, Calif. (US) | ||
| Filed on May 28, 2010, as Appl. No. 12/790,482. | ||
| Int. Cl. H03B 1/00 (2006.01) | ||
| U.S. Cl. 327—108 | 18 Claims |
| 1. A voltage-mode line driver circuit for transmitting a differential signal, comprising:
a first voltage swing circuit having an input coupled to receive an input signal and an output coupled to a first transmission
line;
a second voltage swing circuit having an input coupled to receive an inversion of the input signal and an output coupled to
a second transmission line; and
first and second pre-emphasis circuits respectively coupled to the first and second voltage swing circuits, wherein the first
and second pre-emphasis circuits are configured to supplement the slew rate of respective first and second voltage swing circuits
in response to a transition of the input signal;
wherein the first pre-emphasis circuit is driven by an inversion of a first delayed value of the input signal, and the second
pre-emphasis circuit is driven by the first delayed value of the input signal.
|