A Dual-Channel CMOS Transimpedance Amplifier Array with Automatic Gain Control for Unmanned Vehicle LADARs

Title & Authors
A Dual-Channel CMOS Transimpedance Amplifier Array with Automatic Gain Control for Unmanned Vehicle LADARs
Hong, Chaerin; Park, Sung Min;

Abstract
In this paper, a dual-channel feed-forward transimpedance(TIA) array is realized in a standard $\small{0.18-{\mu}m}$ CMOS technology which exploits automatic gain control function to provide 40-dB input dynamic range for either detecting targets nearby or sensing imminent danger situations. Compared to the previously reported conventional feed-forward TIA, the proposed automatic-gain-control feed-forward TIA(AFF-TIA) extends the input dynamic range 25 dB wider by employing a 4-level automatic gain control circuit. Measured results demonstrate the linearly varying transimpedance gain of 47 to $\small{72dB{\Omega}}$, input dynamic range of 1:100, the bandwidth of $\small{{\geq_-}670MHz}$, the equivalent input referred noise current spectral density of 6.9 pA/$\small{{\surd}}$HZ, the maximum sensitivity of -26.8 dBm for $\small{10^{-12}BER}$, and the power consumption of 27.6 mW from a single 1.8-V supply. The dual-channel chip occupies the area of $\small{1.0{\times}0.73mm^2}$ including I/O pads.
Keywords
Language
Korean
Cited by
References
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