| 摘要 |
The present invention relates to a programmable low-voltage differential signaling (LVDS) output driver. The programmable LVDS output driver may include circuitry for tri-stating the output to allow several programmable LVDS output drivers to be coupled to a single receiver. The programmable LVDS output driver may also include programmable current sources for varying the output current, as well as providing additional current to circuitry within the driver (e.g., impedance circuitry). The programmable LVDS output driver may also include an impedance circuit for adjusting the output impedance of the output driver, while only diverting a small amount of source current. The current diverted by the impedance circuit may be compensated for by increasing the source current from the programmable current sources. The programmable LVDS output driver may also include pre-emphasis circuitry for boosting the edge rates of output signals.
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