0.18μm CMOS Preamplifier For 10Gb/s Optical Receiver

With the rapid development of telecommunication networks, computer networks and Internet, it is urgent to build information super-highway. Optic-fiber communication systems are the principal parts of information super-highway for its merits such as great capacity, long transmit distance, economizing energy source, anti interference and anti radiation etc. Thus, it is very important to design high speed integrated circuits for optical transmission systems with independent property.In the building blocks of an optical transmission system, the pre-amplifier is a critical part. The performance of a preamplifier has great effect on the performance of an optical receiver. The task of this project is to design and realize a preamplifier for SDH STM-64(10Gb/s)optical receiver.Transimpedance preamplifiers are widely used in the high speed optical transmission systems. The RGC-mode transimpedance preamplifier is chosen to be the final circuit for 10 Gb/s preamplifier because of its small input impedance and broad bandwidth. The active inductor configuration is exploited to realize the shunt peaking technique in order to achieve a broader bandwidth.The whole circuits are simulated by using SPICE software tool and TSMC 0.18μm CMOS technology library. The post-simulated results indicate: the transimpedance gain is 62.7dBΩand the -3dB bandwidth is 7.1GHz. The measure results show that the chip's fastest working speed is 10Gb/s and the power dissipation is 21.6mW under 1.8V supply voltage.In this paper, we firstly discuss the design of the circuit. Subsequently, we describe the design of the layout and the realization of the chip. Finally, the test method and the measure results of the chip are presented.