【摘要】 利用CSMC 0.6μm CMOS工艺,设计了基于片上DC-DC转换器的光接收机前置放大器。电路采用可调跨阻放大器与片上DC-DC结构,有效地克服了单端跨阻放大器易受电源波动的干扰,并解决了高灵敏度与低失真相互矛盾的问题。模拟结果表明,输入动态范围为83 dB(峰-峰值=0.2μA~3 mA),等效输入电流噪声为1.2 pA/Hz(155 MHz),可稳定工作在155 Mb/s速率上;在5 V电源电压下,功耗为95 mW。更多还原

【Abstract】 A CMOS preamplifier with on-chip DC-DC voltage-down converter for optical receiver is designed in CSMC’s 0.6 μm CMOS technology.A controllable transimpedance amplifier(TIA) and an on-chip DC-DC converter were adopted.The interference from supply voltage noise was restrained for single-ended TIA,and the conflict between distortion of large signal and high sensitivity was suppressed for the preamplifier.Simulation results show that the circuit achieves a low equivalent input current noise of 1.2 pA/Hz(155 MHz) and a wide input dynamic range greater than 83 dB(from 0.2 μA to 3 mA),and it operates properly at a standard bit rate of 155 Mb/s.Operating at 5 V supply voltage, the circuit dissipates 95 mW of power.更多还原