| Title |
A Dual-Channel CMOS Transimpedance Amplifier Array with Automatic Gain Control for Unmanned Vehicle LADARs |
| Authors |
홍채린(Hong, Chaerin) ; 박성민(Park, Sung Min) |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.5.831 |
| Keywords |
AGC ; CMOS ; Dynamic range ; Feedforward ; LADAR ; TIA |
| Abstract |
In this paper, a dual-channel feed-forward transimpedance(TIA) array is realized in a standard 0.18-μm 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 72dB{Ω}, input dynamic range of 1:100, the bandwidth of { geq_-}670MHz , the equivalent input referred noise current spectral density of 6.9 pA/{ surd}HZ, the maximum sensitivity of -26.8 dBm for 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 1.0×0.73mm^2 including I/O pads. |