The design of an adjustable loop bandwidth (LBW) frequency synthesizer with an on-chip loop filter (LF) array is presented. The LF array based on the simple capacitor multiplier topology is proposed to support LBW switching between 500 kHz and 1 MHz while saving 82.9% chip size compared to the traditional LF array. The maximum capacitance of 108 pF is realized by using the capacitor multiplier with an on-chip capacitance of 6 pF. The proposed frequency synthesizer is implemented in Taiwan Semiconductor Manufacturing Company (TSMC) 0.18- $\mu \text{m}$ CMOS process and supplied at 1.8 V with a current dissipation of 11.8 mA.

中文翻译：

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具有片上环路滤波器阵列的 5GHz 可调环路带宽频率合成器

介绍了具有片上环路滤波器 (LF) 阵列的可调环路带宽 (LBW) 频率合成器的设计。提出了基于简单电容器乘法器拓扑的 LF 阵列，以支持 500 kHz 和 1 MHz 之间的 LBW 切换，同时与传统的 LF 阵列相比，可节省 82.9% 的芯片尺寸。108 pF 的最大电容是通过使用具有 6 pF 片上电容的电容器倍增器实现的。建议的频率合成器在台积电 (TSMC) 0.18- $\mu \text{m}$ CMOS 工艺，电压为 1.8 V，电流耗散为 11.8 mA。