中国集成电路
中國集成電路
중국집성전로
CHINA INTEGRATED CIRCUIT
2011年
12期
55-59
,共5页
脉宽检测芯片%步进电机堵转%电能表码轮驱动%模数混合集成电路
脈寬檢測芯片%步進電機堵轉%電能錶碼輪驅動%模數混閤集成電路
맥관검측심편%보진전궤도전%전능표마륜구동%모수혼합집성전로
pulse detection chip%forced locking of step motor%driving the code gear of power meter%mixed signal integrated circuit
电能表码轮驱动步进电机的堵转将漏掉用电计数。为了检测电能表码轮驱动步进电机堵转的状态,设计了专用检测芯片。芯片基于对步进电机检测线圈的脉冲信号宽度的分析,采用模数混合集成电路检测出堵转脉冲数。其中模拟电路主要是比较器,对检测线圈的信号进行数字化变换。这种检测原理对检测系统的时钟误差有较大的容忍度,可达-23%,＋45%,检测系统可在电能表中长期稳定可靠地工作。芯片采用0.5um CMOS工艺制造,与用微处理器检测堵转的方案相比,有更低的成本,可大批量使用。芯片已通过电能表企业准入试验。
電能錶碼輪驅動步進電機的堵轉將漏掉用電計數。為瞭檢測電能錶碼輪驅動步進電機堵轉的狀態,設計瞭專用檢測芯片。芯片基于對步進電機檢測線圈的脈遲信號寬度的分析,採用模數混閤集成電路檢測齣堵轉脈遲數。其中模擬電路主要是比較器,對檢測線圈的信號進行數字化變換。這種檢測原理對檢測繫統的時鐘誤差有較大的容忍度,可達-23%,＋45%,檢測繫統可在電能錶中長期穩定可靠地工作。芯片採用0.5um CMOS工藝製造,與用微處理器檢測堵轉的方案相比,有更低的成本,可大批量使用。芯片已通過電能錶企業準入試驗。
전능표마륜구동보진전궤적도전장루도용전계수。위료검측전능표마륜구동보진전궤도전적상태,설계료전용검측심편。심편기우대보진전궤검측선권적맥충신호관도적분석,채용모수혼합집성전로검측출도전맥충수。기중모의전로주요시비교기,대검측선권적신호진행수자화변환。저충검측원리대검측계통적시종오차유교대적용인도,가체-23%,＋45%,검측계통가재전능표중장기은정가고지공작。심편채용0.5um CMOS공예제조,여용미처리기검측도전적방안상비,유경저적성본,가대비량사용。심편이통과전능표기업준입시험。
The forced locking of stepper motor driving the code gear will cause energy meter counting error.In order to detect this forced locking of stepper motor,a dedicated detecting chip has been designed.The chip detects the number of forced locking pulses by mixed signal integrated circuit based on measuring the width of pulses generated from sense coil.The main part of analog circuit is comparator which digitizes the sense coil’s signal.The method used for detection has large tolerance to detection system’s clock error,from-23% to ＋45% of standard clock.The reliability of this chip installed on energy meter is proved.This chip was fabricated using 0.5μm CMOS process.Comparing with MCU forced locking detection method,applying the dedicated IC will greatly lower the cost during mass production.The chip has passed the entrance test of energy meter company.
