A ۶۵ nm CMOS Feedforward Transimpedance Amplifier for Optical Fibers Communications

A series of inductor loads may not be the best design criterion for improvement in circuit performance. In this work, the best compromise so far for the trade-off in power consumption, input referred noise current spectral density, with wide bandwidth, high transimpedance gain and low DC supply voltage is reported. A simulated ۶۵ nm CMOS feedforward transimpedance amplifier is introduced with a series of single PMOS loads instead of a series of inductor loads. A bandwidth of ۲۰.۱۶ GHz with a transimpedance gain of ۵۱.۱۶ dBΩ, an input referred noise current spectral density of ۳۴.۳ p A⁄√Hz, a power consumption of ۱.۰۵۲ mW and with a ۱V DC supply voltage are presented. In addition, an active inductor load (instead of inductor load) is introduced within the ۶۵ nm CMOS feedforward transimpedance amplifier. A bandwidth of ۳.۷۵ GHz with a transimpedance gain of ۴۲.۷ dBΩ, an input referred noise current spectral density of ۲۱.۴ p A⁄√Hz, a power consumption of ۰.۶۶ mW and with a ۱V DC supply voltage are reported.

Keywords:

Transimpedance amplifier , Wideband Amplifier , Optical Fiber Circuit , Front-End Preamplifier