ZHANG Yan-hua, YANG Lu
（College of Information and Communication Engineering, North University of China, Taiyuan 030051, China）
Abstract： In order to filter signal effectively according to selective center frequency, a voltage-controlled dynamic band-pass filter with gain compensation was designed based on voltage-controlled gain wideband amplifier VCA810. The transfer function of the filter was analyzed and gain compensation voltages were given through tests; besides, a system was designed, including the gain compensation circuit and the control voltage circuit, etc. Center frequency will change from 1 kHz to 20 kHz according to control voltage on condition that bandwidth of the filter remains constant. The designed system has the advantages of simple structure, low noise, stable performance and convenient adjustment.
Key words： VCA810; dynamic band-pass filter; voltage-controlled; gain compensation
CLD number： TN911.71Document code： A
Article ID： 1674-8042（2015）02-0147-06 doi： 10.3969/j.issn.1674-8042.2015.02.007
References
［1］ Brennan P V, Huang Y. Determination of sweep linearity requirements in FMCW radar systems based on simple voltage-controlled oscillator sources. IEEE Transactions on Aerospace and Electronic Systems， 2011， 47（3）： 1594-1604.
［2］ Baek T J， Ko D S. A transceiver module for FMCW radar sensors using 94-GHz dot-type Schottky diode mixer. IEEE Sensors Journal， 2011， 11（2）： 370-376.
［3］ Park J D， Kim W J. An efficient method of eliminating the range ambiguity for a low-cost FMCW radar using VCO tuning characteristics. IEEE Transactions on Microwave Theory and Techniques， 2006， 54（10）： 3623-3629.
［4］ YUE Wen-bao. The research and implementation of FMCW radar Ranging System. Taiyuan： North University of China， 2013.
［5］ CHEN Jing， LUO Chun-hui， HUANG Wei. Design and realization of a broad band-pass active filter. Ship Electronic Engineering， 2011， 31(6)： 87-88.
［6］ LI Yuan-wen. Design of an active filter. Beijing： Posts & Telecom Press， 1986.
［7］ LI Yu， GAO Tian. Design and testing of 8-channel band-pass filer. Electronic Design Engineering， 2014， 22(2)： 78-81.
［8］ ZHANG Ren-min， HUANG Guo-qing. Programmable high gain audio amplifier with center frequency selected filtering feature. Journal of Huaihua University， 2012， 31(11)： 17-22.
基于VCA810的电压控制动态带通滤波器设计
张艳花， 杨录
(中北大学 信息与通信工程学院， 山西 太原 030051)
摘要： 为了有效地对信号进行选频滤波， 基于电压控制增益宽带放大器VCA810， 本文设计实现了具有增益补偿的压控动态带通滤波器。 文中分析了滤波器的系统传输函数， 通过实验测试给出了一定频率范围内的增益补偿电压， 并设计了增益补偿电路和控制电压产生电路。 在滤波器带宽一定的情况下， 通过改变控制电压使带通滤波器的中心频率在1-20 kHz 范围内调整。 系统结构简单， 噪声小， 性能稳定， 调节方便。
关键词： VCA810； 动态带通滤波器； 电压控制； 增益补偿
引用格式：ZHANG Yan-hua， YANG Lu. Design of voltage-controlled dynamic band-pass filter based on VCA810. Journal of Measurement Science and Instrumentation， 2015， 6(2)： 147-152. ［doi： 10.3969／j.issn.1674-8042.2015.02.007］
[full text view]
