A 4MHz Gm-C Filter with On-Chip Frequency Automatic Tuning

YAO Jin-ke; WU En-de; CHI Bao-yong; WANG Zhi-hua

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A 4MHz Gm-C Filter with On-Chip Frequency Automatic Tuning

更新时间：2025-07-16

- A 4MHz Gm-C Filter with On-Chip Frequency Automatic Tuning
- Acta Electronica Sinica Vol. 34, Issue 11, Pages: 2076-2080(2006)
- 作者机构：
  
  1. 清华大学电子工程系,北京,100084
  2. 清华大学微电子学研究所,北京,100084
  3. 清华大学电子工程系北京,100084
  4. 清华大学微电子学研究所北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.5
- Published：2006
- 稿件说明：
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YAO Jin-ke, WU En-de, CHI Bao-yong, et al. A 4MHz Gm-C Filter with On-Chip Frequency Automatic Tuning[J]. Acta Electronica Sinica, 2006, 34(11): 2076-2080.
DOI：

YAO Jin-ke, WU En-de, CHI Bao-yong, et al. A 4MHz Gm-C Filter with On-Chip Frequency Automatic Tuning[J]. Acta Electronica Sinica, 2006, 34(11): 2076-2080. DOI：

摘要

本文实现了一个应用于全集成L带DAB接收机的5阶Gm-C椭圆低通滤波器

该滤波器上集成了基于锁相环的片上频率自动调谐电路

使得该滤波器的截止频率可以准确控制在4MHz.该滤波器已经采用0.35μm CMOS工艺实现.测试结果表明

该滤波器的频率精度可以控制在1%以内

动态范围约为54dB

阻带抑制率大于40dB.该滤波器采用3.3V电源

消耗的电流约为13mA.

Abstract

A fifth-order elliptic low-pass Gm-C filter used in monolithic DAB receiver is presented.The filter integrates an on-chip frequency automatic tuning circuit based on PLL to control the cutoff frequency.The filter has been implemented in 0.35 μ m CMOS process.The measurement results show that the frequency tuning error is within 1%

the dynamic range is 54dB

and the stop-band rejection rate is greater than 40dB.The filter draws 13mA current from a 3.3V power supply.

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