Details

Autor(en) / Beteiligte

• Lei Yang
• Shaowei Zhen
• Jiongwei Zheng
• Shuiqing Xi
• Xinjiang Gao
• Zengxin Liu
• He Tang
• Ping Luo
• Bo Zhang

Titel

A 110-dBΩ, 113-MHz variable-gain transimpedance amplifier for flash 3D imaging systems

Ist Teil von

• 2017 IEEE 12th International Conference on ASIC (ASICON), 2017, p.456-459

Ort / Verlag

IEEE

Erscheinungsjahr

2017

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• A variable-gain transimpedance amplifier (TIA) with a high gain, high bandwidth, and low equivalent input noise current was proposed for laser detection and ranging systems. The proposed TIA replaces feedback resistor and capacitor in conventional design with MOS working in linear region and feed forward circuit. Consequently, the pixel pitch of TIA is reduced significantly. The proposed TIA is based on 0.18-μm standard CMOS process, and the maximum gain is 110 dBΩ, with sixteen configurable gain steps. The bandwidth is high to 113 MHz, and the input-referred noise current is 0.9pA/√Hz in high gain mode. The minimum detectable photocurrent is 100nA when SNR=5. The power consumption is 0.56mW@1.8V.