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Title [REGULAR PAPER] A Mirrored Current-conveyor Transimpedance Amplifier in 65-nm CMOS
Authors (Daseul Yoon) ; (Ji-Eun Joo) ; (Sung Min Park)
DOI https://doi.org/10.5573/JSTS.2020.20.6.526
Page pp.526-532
ISSN 1598-1657
Keywords CMOS; current-conveyor; feedforward control-voltage generator; mirrored cascode; TIA
Abstract This paper presents a current-mode transimpedance amplifier (TIA) implemented in a 65-nm 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 dBΩ, a wide dynamic-range of 41.9 dB that accommodates the input currents from 18 ?App to 2.24 mApp, the minimum noise current spectral density of 16.8 pA/sqrt(Hz), the power dissipation of 40 mW, and the core area of 1.0 mm2.