Abstract: This paper describes a 100BaseTX Ethernet physical layer interface with ADC in 1.2 V 0.13 μm CMOS technology. A continuous-time linear equalizer (CTLE) and a decision-feedback equalizer (DFE) are used in receiver. The circuit uses digital techniques to perform adaptive line equalization and baseline wander compensation through analog-to-digital convertor. The proposed CTLE and variable-gain amplifier (VGA) mixed structure shareing resistor and capacitance, can decrease low power and small area. The transceiver allows for robust performance for cable lengths>100 m.