A multi-rate transmitter based on IEEE 1394B

This paper presents a multi-rate transmitter that supports 4 data rates of 125Mbps, 250Mbps, 500Mbps, and 1Gbps. Its output meets the requirements of IEEE1394B standard. Pre-emphasis is used in the transmitter to reduce inter-symbol interference (ISI) caused by channel low-pass effects. The design adopts Low-Voltage Differential Signaling (LVDS) driver with common-mode feedback (CMFB) circuit. In the fastest 1Gbps data rate mode, the vertical eye opening of the eye diagram can reach 450mV, while the jitter is only 38ps.The chip is designed under 0.13μm process, the area of the transmitter is 0.67*0.2mm². The power consumption is 93.5mW under 1Gbps mode.