一种基于sar的三阶有源rc复合滤波器快速自动频率调谐电路

2021 IEEE 15th International Conference on Anti-counterfeiting, Security, and Identification (ASID) Pub Date : 2021-10-29 DOI:10.1109/asid52932.2021.9651714

Boyong Jin, Zhijie Chen, Xu Liu, Zhiqi Shen, Yucheng Bao, Y. Xing, Peiyuan Wan

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引用次数: 0

摘要

本文提出了一种带快速自动调谐电路的三阶有源rc复合滤波器。复合滤波器的带宽和中心频率主要与电阻器和电容器的绝对时间常数值有关。由于工艺的变化，该值的变化甚至可能超过±40%。一种用于有源rc复合滤波器的频率调谐电路可以避免过程变化的影响，提供理想的频率响应。提出了一种采用逐次逼近寄存器(SAR)逻辑的片上快速频率调谐电路。与传统的基于计数器的逻辑相比，该电路具有较高的调谐速度。采用中芯国际55nm工艺设计了3阶有源rc复合滤波器，并设计了5位快速自动调谐电路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A SAR-based Fast Automatic Frequency Tuning Circuit in a 3-th Order Active-RC Complex Filter

This paper presents a 3-th order active-RC complex filter with fast automatic frequency tuning circuit. The bandwidth and center frequency of a complex filter are mainly related to the absolute time constant value of resistors and capacitors. Due to the process variation, the value may vary even over ±40%. A frequency tuning circuit for active-RC complex filter can avoid the affect of process variation and provide ideal frequency response. This paper proposed an on-chip fast frequency tuning circuit with successive approximation register (SAR) logic. Compared with the conventional counter-based logic, the proposed circuit can exhibit high tuning speed. This 3-th order active-RC complex filter with 5-bit fast automatic tuning circuit is designed in SMIC 55nm process.

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2021 IEEE 15th International Conference on Anti-counterfeiting, Security, and Identification (ASID)

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