【摘要】 介绍了一种以AT89S52为控制核心,利用MAX262实现的新型程控滤波器,-3dB截止频率在1~40kHz范围内可调。详细论述了系统的硬件组成、各功能部分的电路设计,给出了关键功能部分的电路图、单片机的程序设计。系统在实际应用中,工作稳定可靠。更多还原

【Abstract】 This paper introduces a programmable filter utilizing MAX262,and using AT89S52 as control core,and it can achieve an-3dB cutoff frequency adjustable in 1kHz-40kHz.It describes the hardware composition of the system,the circuit design of all functional parts,and gives out the circuit diagrams of main functional parts and the programming of singlechip microcomputer.This system works stably and reliably at actual application.更多还原