Design and implementation of CMOS LVDS 2.5 Gb/s transmitter and 1.3 Gb/s receiver for optical interconnections

Design and implementation of a 2.5Gb/s CMOS transmitter and a 1.3Gb/s receiver for optical interconnections are presented. The transmitter accepts LVDS signals and converts it into optical signals. The receiver receives the optical signals and recovers it to LVDS signals. They are designed and implemented in standard 0.25um CMOS process using 1-poly and 5-metal layers. The 850nm VCSEL is assumed as a light source. Maximum transmit data rate of 2.5Gb/s and receive data rate of 1.3Gb/s are obtained over a wide range of common mode operation. At supply voltage of 2.5V, the transmitter and receiver consume less than 50mW and 51mW of power, respectively.