کنفرانس بین المللی میکروالکترونیک ایران

صفحه اصلی / ششمین کنفرانس بین المللی میکروالکترونیک ایران

Design of All-Passive Harmonic-Rejection N-Path Filter

نویسندگان :

Vahid Moradino¹ Esmaeil Najafiaghdam²

1- دانشگاه صنعتی سهند 2- دانشگاه صنعتی سهند

کلمات کلیدی :

N-path filter،harmonic-rejection،All-passive filter،capacitive stacking

چکیده :

This work presents an all-passive harmonic-rejection n-path filter designed using 65nm standard CMOS technology. The filter effectively eliminates harmonic components of the switching signal through the use of capacitive stacking and precise adjustment of switching timings of branches, obviating the need for weighting coefficients. The proposed filter exhibits an in-band passive gain ranging from 3.5 to 7 dB across the 0.1-1.2 GHz frequency range. It achieves a harmonic rejection ratio of third order exceeding 17 dB and an out-of-band IIP3 greater than +13 dBm. The filter maintains a noise figure between 3.5 and 7 dB within this frequency range, with only a 1.5 dB degradation in the presence of a 0 dBm blocker. Post-layout simulations validate the performance of the proposed filter. Importantly, the filter's power consumption is negligible, aside from that required for generating switching signals, due to its reliance on passive components.