| FM接收机中频滤波器的设计 |
| |
| 引用本文： | 林萍,胡锦,李湘春.FM接收机中频滤波器的设计[J].宇航计测技术,2009,29(4):67-70. |
| |
| 作者姓名： | 林萍 胡锦 李湘春 |
| |
| 作者单位： | 1. 福建省计算中心,福州,350003
2. 湖南大学物理与微电子科学学院,长沙,410082 |
| |
| 基金项目： | 杭州市科研院所专项基金资助 |
| |
| 摘 要： | 介绍了一种基于双极技术的中心频率、带宽、增益可控的Gm-C型多相滤波器。分析了滤波器的基本原理,推导出其电路结构形式,并对其中关键的Gm单元进行了优化设计,实现了一个六级带通滤波器。该滤波器应用于低功耗FM低中频接收机中频滤波器的设计,镜像抑制比高达66 dB,总功耗仅为3.75 mW。
|
| 关 键 词： | 双极技术 多相滤波器 带通滤波器 调频接收机 镜像抑制比 |
Design of Intermediate Frequency Filter in FM Receiver |
| |
| LIN Ping,HU Jin,LI Xiang-chun.Design of Intermediate Frequency Filter in FM Receiver[J].Journal of Astronautic Metrology and Measurement,2009,29(4):67-70. |
| |
| Authors: | LIN Ping HU Jin LI Xiang-chun |
| |
| Institution: | LIN Ping HU Jin LI Xiang-chun(1. Fujian Compute Centre, Fuzhou 350003; 2. School of Physics and Microelectronics Science, Hunan University, Changsha 410082) |
| |
| Abstract: | A Gm-C polyphase filter based on bipolar technique whose centre frequency, bandwidth and gain are controllable is introduced. With discussion of principles of this filter, the circuit structure is deduced. Furthermore, the Gm cell of the filter is optimized and a six-stage bandpass filter is realized. The filter is applied to the design of IF filter in low power FM and Low-IF receiver, the image rejection ratio can achieve 66dB while total power is merely 3, 75roW. |
| |
| Keywords: | Bipolar technique Polyphase filter Bandpass filter FM receiver Image rejection ratio |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
