Design and implementation of an optoelectronics chipset for automotive wired network

In this paper, an optoelectronics transmitter and receiver chipset is designed and implemented for automotive wired network using 0.5-¿m CMOS technology. In fiber optic transmitter (FOT), modulation current has to be arranged in 3 to 4-mA to meet eye protection regulations in visible red wavelength (650-nm). To apply for low cost POF applications, simple and low cost FOT is proposed. FOT is designed to operate at 50-Mb/s bit rates and consumes only 6-mA DC currents including modulation current of 3.5-mA. In the receiver side, two methods of auto-threshold control technique will be introduced and compared. The designed fiber optic receiver (FOR) achieves trans-impedance gain of 145-dB ¿, 50-Mb/s operations with 45-MHz bandwidth for 4-pF photodiode parasitic capacitance. And proposed fiber optic receiver guarantees digital level output swing against the range of incident photo current from 200-nA to 25-uA and the range of operating frequency from DC to 50-Mb/s. Receiver chipset consumes only 10-mW from a 3.3-V single supply.