CMOS Optical Transimpedance Amplifier Design for PAM Application

V.K. Shenoy, H. Shanmugasundaram, S. Jung, J. Gao, and Y. Joo (USA)


Transimpedance amplifier, Optoelectronic Circuits, PAM, CMOS.


In this paper, a high speed differential trans-impedance amplifier is designed using TSMC 0.18µm mixed-signal non-epi CMOS technology. The amplifier is designed to function in the analog front-end of a pulse amplitude modulation (PAM) optical communication receiver. Operating with an input of 2.5Gbps, this trans-impedance amplifier satisfies the SONET OC-48 standard. PAM signaling of 4, 8 and 16 levels, establishes an effective throughput of 5Gbps, 7.5Gbps and 10Gbps, respectively. Simulations reveal a trans-impedance gain of 66dBΩ, a sensitivity of -11.4dBm, and a power consumption of 148mW.

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