Abstract
A low-noise and high-accuracy transimpedance amplifier (TIA) for light detection and ranging (LiDAR) system is proposed in this article. A power-on-calibration (POC) technique is proposed to improve the transimpedance gain accuracy of single-channel TIA and eliminate the transimpedance mismatch of multichannel TIAs. The noise canceling technique is adopted to improve the circuit sensitivity. Implemented and fabricated in a 0.18- μm standard CMOS technology, the whole circuit consumes 39.6 mW with a 3.3-V supply, where the TIA core circuit and output buffer consume 29.7 and 9.9 mW, respectively. The measured transimpedance gain and bandwidth of the TIA are 86 dB Ω and 240 MHz, respectively. The achieved input-referred noise current is 3.1 pA/ Hz−−−√ . A linear dynamic range of 66 dB has been obtained with a minimum detectable signal (MDS) of 500 nA [signal-to-noise ratio (SNR) = 10] and an output-amplitude error less than 20%. In addition, the measured small-signal gain error is reduced from ±40% to less than ±5% due to the proposed POC technique.