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1.44 mW and 60 dB dynamic range optical receiver for near infrared spectroscopy

机译:1.44 mW和60 dB动态范围光接收器,用于近红外光谱

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This paper presents the design and post layout simulation of a high dynamic-rang and low-power transimpedance amplifiers (TIA) for frequency domain near infrared spectroscopy (FD-NIRS). The proposed TIA achieves 108.3 dBΩ gain, 10 MHz bandwidth, and 5.5 nArms integrated input referred noise using a photodiode with 2 pF capacitance. The proposed TIA consumes 260 μW from a 1.2 V supply. The maximum input photocurrent is extended to 9.2 μAp-p with the adopted automatic gain control (AGC). A post amplifier with AGC is introduced after the TIA to increase the gain of the optical receiver and to maintain a good linearity. The complete optical receiver achieves 122 dBΩ gain, 9.9 MHz bandwidth, 5.9 nArms total integrated input noise current, and consumes 1.44 mW from a 1.2 V supply.
机译:本文介绍了用于频域近红外光谱(FD-NIRS)的高动态范围和低功率跨阻放大器(TIA)的设计和布局后仿真。拟议的TIA使用具有2 pF电容的光电二极管实现108.3dBΩ的增益,10 MHz的带宽和5.5 nArms的集成输入参考噪声。拟议的TIA从1.2 V电源消耗260μW的功率。通过采用自动增益控制(AGC),最大输入光电流可扩展至9.2μAp-p。在TIA之后引入带有AGC的后置放大器,以增加光接收器的增益并保持良好的线性度。完整的光接收器可实现122dBΩ的增益,9.9 MHz的带宽,5.9 nArms的总集成输入噪声电流,并通过1.2 V电源消耗1.44 mW。

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