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JSSC 2008第5期RF & Wireless0.13μm CMOSNeural Network Accelerator

Recursive Receiver Down-Converters With Multiband Feedback and Gain-Reuse Junghw

递归接收器下变频器设计,通过多频带反馈和增益复用降低功耗
50dB/56dB转换增益, 12.7dB/9.4dB噪声系数, 8dBV/11dBV OIP3, 1.2V 2.9mA/2.1mA
递归下变频器增益复用多频带反馈低功耗电流复用
创新点1:递归反馈增强转换增益(电路创新)。通过将混频器的下变频中频输出递归反馈到其输入级,显著提高了转换增益,同时主要电流需求由混频器的输入跨导器决定,降低了功耗。
创新点2:共用输入级跨导实现基带增益(电路创新)。在第一种拓扑中,利用共源NMOS器件作为混频器的射频输入级,并复用其跨导来提供基带增益,简化了电路结构并提高了效率。
创新点3:非线性产物抵消提升线性度(方法创新)。通过分析噪声和线性性能,讨论了通过抵消非线性产物来增强输入三阶交调点(IIP3)的潜力,从而提高了系统的线性度。
创新点4:多频带反馈与增益复用(系统创新)。在第二种拓扑中,利用差分对作为射频输入级,并通过尾电流源器件的跨导提供基带增益,实现了多频带反馈与增益复用,进一步优化了系统性能。
Abstract
y , Member , IEEE Abstract—Receiver down-converter topologies are presented that provide simultaneous frequency conversion and baseband amplification within a mixer , in order to reduce power dissipation for a given dynamic range. The down-converted IF output of a mixer is reapplied to its input stage in a recursive manner, which significantly enhances the conversion gain, with current require- ment determined primarily by the input transconductor of the mixer. Two down-converter topologies based