This article presents a fully differential (FD) low-voltage (LV) fourth-order Butterworth active-RC low-pass filter (LPF) with a maximum cutoff frequency $(f_{o})$ of 160 MHz, $f_{o}$ programmability, and adaptive power. The proposed filter targets communication systems requiring high and reconfigurable $f_{o}$ at supply voltages $(V_{\mathrm {DD}}s)$ of 0.6 V. The filter is implemented with an active-RC topology, a programmable $f_{o}$ between four steps, 20/40/80/160 MHz, and a $f_{o}$ fine-tuning option after fabrication via capacitor banks. A compact LV FD amplifier with feedforward gain-boosting implementation is used to meet the stringent filter’s performance. The novel amplifier achieves an open loop gain of 66 dB and a maximum unity-gain frequency (UGF) of 759 MHz with $V_{\mathrm {DD}} = 0.6$ V and 5.27 mW of power dissipation. Using the proposed amplifier, the filter achieves the highest $f_{o}$ reported in the literature for LV active-RC implementations and 40% power reduction over similar high- $f_{o}$ LV filters. The filter was fabricated in a CMOS 130-nm technology; it has a THD = 50.7 dB, signal-to-noise and distortion (SNDR) = 45.37 dB, $P_{\mathrm {1dB}} = 4.26$ dBm and 520- $\mu \text{V}$ RMS integrated noise over the filter’s bandwidth (BW), while consuming 23.8 mA from a 0.6-V supply for $f_{o} = 160$ MHz.

中文翻译：

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具有截止频率选择功能的 0.6V 高能效有源 RC 模拟低通滤波器

本文介绍了一种全差分 (FD) 低压 (LV) 四阶巴特沃斯有源RC 具有最大截止频率的低通滤波器 (LPF) $(f_{o})$ 160 兆赫， $f_{o}$ 可编程性和自适应能力。所提出的过滤器针对需要高和可重新配置的通信系统 $f_{o}$ 在电源电压 $(V_{\mathrm {DD}}s)$ 0.6 V。滤波器采用有源-RC 拓扑结构，可编程 $f_{o}$ 四步之间，20/40/80/160 MHz，和 $f_{o}$ 通过电容器组制造后的微调选项。具有前馈增益提升实现的紧凑型 LV FD 放大器用于满足严格的滤波器性能。新型放大器实现了 66 dB 的开环增益和 759 MHz 的最大单位增益频率 (UGF) $V_{\mathrm {DD}} = 0.6$ V 和 5.27 mW 的功耗。使用建议的放大器，滤波器达到最高 $f_{o}$ 文献中报道的 LV 活性RC 实现和 40% 的功耗比类似的高 $f_{o}$ 低压过滤器。滤波器采用 CMOS 130-nm 技术制造；它的 THD = 50.7 dB，信噪比和失真 (SNDR) = 45.37 dB， $P_{\mathrm {1dB}} = 4.26$ dBm 和 520- $\mu \text{V}$ 滤波器带宽 (BW) 上的 RMS 集成噪声，同时从 0.6-V 电源消耗 23.8 mA $f_{o} = 160$ 兆赫。