测控技术
測控技術
측공기술
MEASUREMENT & CONTROL TECHNOLOGY
2010年
1期
73-76,80
,共5页
罗建%陈洁%马定坤%白鑫
囉建%陳潔%馬定坤%白鑫
라건%진길%마정곤%백흠
信号调理%滤波器%低功耗%程控
信號調理%濾波器%低功耗%程控
신호조리%려파기%저공모%정공
signal conditioning system%filter%low power consumption%programmable control
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.
隨著手持式設備、電池供電繫統的廣汎應用,對信號調理繫統的低功耗要求越來越高,新型數字化信號調理繫統還要求可靈活改變所處理信號的帶寬和截止頻率.為此,設計瞭一款低功耗的可程控濾波器方案,採用鐘控開關電容濾波芯片LTC1068和LTC1069來實現帶通濾波器,由微功耗控製器MSP430F5438設置其高低通截止頻率.通過對驗證電路的測試,結果錶明該設計可滿足實際使用的要求.
수착수지식설비、전지공전계통적엄범응용,대신호조리계통적저공모요구월래월고,신형수자화신호조리계통환요구가령활개변소처리신호적대관화절지빈솔.위차,설계료일관저공모적가정공려파기방안,채용종공개관전용려파심편LTC1068화LTC1069래실현대통려파기,유미공모공제기MSP430F5438설치기고저통절지빈솔.통과대험증전로적측시,결과표명해설계가만족실제사용적요구.
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.
