Abstract
This paper presents a current-mode transimpedance amplifier (TIA) implemented in a 65- ㎚ CMOS technology, in which the mirrored current-conveyor (MCC) input configuration is proposed to lower the input impedance for wide bandwidth, thereby enabling narrow pulse recovery. Also, a feedforward control-voltage generator is suggested to realize automatic gain-control within a single pulse. Post-layout simulations of the proposed MCC-TIA demonstrate the variable transimpedance gain of 58~77 ㏈Ω, a wide dynamic-range of 41.9 ㏈ that accommodates the input currents from 18 ㎂SUBpp/SUB to 2.24 ㎃SUBpp/SUB, the minimum noise current spectral density of 16.8 ㎀/sqrt(Hz), the power dissipation of 40 ㎽, and the core area of 1.0 ㎟.
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