A modified noise/nonlinearity cancellation low-noise transconductance amplifier (LNTA) based on an inductively degenerated common-source stage is proposed to improve linearity. The linearity of the proposed LNTA is analyzed using the Volterra series yielding closed-form equations for the third-order input intercept point (IIP3) that shows excellent matching with the simulation results. The derived equations for noise figure (NF) and IIP3 are simple enough to be used for design optimization. Calculations and simulation results show that the proposed LNTA is more linear than a conventional one, while NF approximately remains unchanged. Another feature of the proposed noise-canceling LNTA is that no additional baseband recombination stage is needed, leading to reduced complexity in the receiver baseband stage. The NF and out-of-band (OOB) IIP3 of the receiver is about 3.3 dB and more than 20 dBm, respectively. The receiver consumes 10.5 mA from 1.8-V supply voltage. The current consumption of the LO divider is 6.5 mA from a dedicated 1-V supply voltage.

中文翻译：

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具有共享 TIA 架构的高度线性无 SAW 降噪接收器


提出了一种基于电感简并共源级的改进噪声/非线性消除低噪声跨导放大器（LNTA），以提高线性度。使用 Volterra 级数对所提出的 LNTA 的线性度进行分析，得出三阶输入截点 (IIP3) 的封闭式方程，该方程与仿真结果完美匹配。噪声系数 (NF) 和 IIP3 的导出方程足够简单，可用于设计优化。计算和仿真结果表明，所提出的 LNTA 比传统 LNTA 更加线性，而 NF 近似保持不变。所提出的降噪 LNTA 的另一个特点是不需要额外的基带重组级，从而降低了接收器基带级的复杂性。接收器的 NF 和带外 (OOB) IIP3 分别约为 3.3 dB 和超过 20 dBm。接收器在 1.8V 电源电压下消耗 10.5mA 的电流。 LO 分压器在专用 1V 电源电压下的电流消耗为 6.5mA。