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Low-Power BiCMOS Optical Receiver With V oltage-Controlled Transimpedance
一种低功耗BiCMOS光接收器，具有电压控制跨阻和混合信号处理技术。
0.6μm BiCMOS, 3.2mW, 189MHz, 3.7ns/3.3ns
光接收器BiCMOS电压控制跨阻PIN光电二极管低功耗
▸电压控制跨阻技术：通过电压控制电阻实现跨阻的连续可调，提供灵活的灵敏度调节能力（线性误差<3.1%），属于电路创新。
▸混合电流模式和电压模式信号处理：结合电流传输器与电压放大器，显著降低光电二极管电容对带宽的影响（带宽达189MHz），属于方法创新。
▸与PIN光电二极管单片集成：采用0.6μm BiCMOS工艺实现光电接收器单片集成，功耗仅3.2mW，提升系统紧凑性与能效，属于系统级创新。
▸高动态范围与低噪声设计：实现78.8动态范围（37.9dB）及77.8dBm低噪声水平（50MHz频点），优化了光电接收器的信噪比性能，属于性能创新。
Abstract
An optical receiver with voltage-controlled trans- impedance using a current conveyor and a voltage amplifier monolithically integrated with a PIN photodiode in 0.6 m BiCMOS technology is presented. The transimpedance is directly proportional to a voltage-controlled resistance, and can be contin- uously varied by changing its control voltage. Thanks to the mixed current-mode and voltage-mode signal processing, the bandwidth of the optical receiver is virtually independent of the photodiode capacitance. A linearity error smaller than 3.1%, a sensitivity dynamic range of 78.8 (37.9 dB) with the largest sensitivity of /61 /56/57/48mV W at 660 nm, an offset voltage smaller than 0.53 mV , a largest maximum power consumption of only 3.2 mW, a small-signal frequency bandwidth up to 189 MHz, a large-signal rise time/fall time down to 3.7 ns/3.3 ns, and an output noise level down to 77.8 dBm (for a frequency of 50 MHz and a resolution bandwidth of 30 kHz) are achieved.