US Patent 7330056 Low power CMOS LVDS driver

A low voltage CMOS output driver is adapted to generate an output voltage that stays within predefined limits at relatively low supply voltages. The output driver includes, in part, a voltage-controlled resistor, a voltage-controlled current sink, and a switching stage. A control circuit provides the voltages that are applied to the voltage-controlled resistor and the voltage-controlled current sink. The voltage applied to the voltage-controlled resistor defines the high output voltage. The voltage applied to the voltage-controlled current sink defines the low output voltage. The control circuit is a scaled replica of the output driver and is adapted to consume a current that is 1/L times the current consumed by the output driver.