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出 处:《测控技术》2010年第1期73-76,80,共5页Measurement & Control Technology
摘 要:随着手持式设备、电池供电系统的广泛应用,对信号调理系统的低功耗要求越来越高,新型数字化信号调理系统还要求可灵活改变所处理信号的带宽和截止频率。为此,设计了一款低功耗的可程控滤波器方案,采用钟控开关电容滤波芯片LTC1068和LTC1069来实现带通滤波器,由微功耗控制器MSP430F5438设置其高低通截止频率。通过对验证电路的测试,结果表明该设计可满足实际使用的要求。With the wildly application of portable devices and battery-powered system, the demand of signal conditioning systems for low power consumption is rapidly increased. The New digital signal conditioning system also requires changing the signal bandwidth and cut-off frequency easily- A new scheme of low power consumption programmable control filter is designed. By using time control switched-capacitor filter chip LTC1068 and LTC1069, band-pass filter is achieved. And the master controller MSP430F5438 sets the high and low cutoff frequency. Through the test circuit, the result shows that the design can be actually used.
分 类 号:TP21[自动化与计算机技术—检测技术与自动化装置]
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