Abstract

This paper presents a 4th-order low-pass continuous-time Diode-RC filter with 24 MHz cut-off frequency. The filter structure is based on the combination of positive (passive) and negative (using cross-coupled MOS transistors) cells to synthesize complex-conjugate-poles pairs. Moreover, the filter is designed and optimized to have high-linearity along all the filter pass-band. The filter exhibits 16 dBm-\(\text {IIP}_3\) with 2–3 MHz input tones and 5 dBm-\(\text {IIP}_3\) with 23–24 MHz, whereas the current consumption remains limited to \(100 \, \upmu \hbox {A}\) from 1.8 V supply voltage.

中文翻译：

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基于4阶100μA二极管RC的滤波器，截止频率为24 MHz时具有5 dBm-IIP 3

摘要

本文提出了一种具有24 MHz截止频率的四阶低通连续时间Diode-RC滤波器。滤波器结构基于正（无源）和负（使用交叉耦合的MOS晶体管）单元的组合来合成复共轭极对。此外，对滤波器进行了设计和优化，使其在所有滤波器通带上具有高线性度。该滤波器在2–3 MHz输入音调下表现出16 dBm- \（\ text {IIP} _3 \），在23–24 MHz时表现出5 dBm- \（\ text {IIP} _3 \），而电流消耗仍然限于\（100 \，\ upmu \ hbox {A} \）来自1.8 V电源电压。