⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种面积为0.25mm²的AC偏置MEMS麦克风接口芯片，实现了58dBA的信噪比。通过片上电容的11位可编程修调，有效抑制了载波和时钟幅度噪声的影响。
Klaus Reimann1, Kofi A.A. Makinwa2 NXP Semiconductors, Eindhoven, The Netherlands, Delft University of Technology, Delft, The Netherlands 1 On-chip capacitors C1,2,3 must be trimmed to Cm to maximize carrier suppression and minimize the effect of clock amplitude-noise. In this design, they can be independently programmed with 11b resolution over a 10pF range. The amplifier’s input stage (Fig. 22.2.2), is followed by a Miller-compensated class-A output stage. For test-purposes, this stage is designed to drive the 3kΩ input resistors (R1) of an off-chip inverting amplifier. For this reason, the ASIC’s supply current is about 50% higher than strictly necessary. 2 Capacitive MEMS microphone roadmaps are mainly driven by increasing SNR and reducing size/cost. This requires smaller microphones, ASICs with lower noise and smaller area, and cheaper packaging. Because of fundamental limitations, traditional DC-biased microphones will have difficulty following these
Selcuk Ersoy1, Robert H.M. van Veldhoven1, Fabio Sebastiano1,