A constant slew rate Ethernet line driver

An analog bias circuit consisting of two transistors, three current sources, and one resistor facilitates the design of an Ethernet line driver. The rise time is insensitive to process variations and temperature variations, Rise-time accuracy is 223 ppm//spl deg/C over a temperature range of 140/spl deg/C. This line driver has been fabricated in 0.35-/spl mu/m CMOS.