【摘要】 给出一种智微功耗能仪表中的压力接口电路 .它的关键技术包括 :控制传感器激励源 ;充分利用LPC76 4内部软硬件资源组成双积分式A D转换电路 ;外围元件低电压、微功耗的简约设计以及在软件上设置”休眠陷阱”等等 .其结果使测压接口电路的平均电流在 6 0 μA以下 .更多还原

【Abstract】 A interface circuit for pressure detector is introduced for the micro-dissipation Intelligent Instrument. The keys of technologiesin clude controlling the exciting current to the pressure transducer,making full use of the update MCU LPC764’s inner resources of hardware and software to form multi-channels A/D converter;as well as the simplified design of the peripheral elements with low voltage and power and the set of sleep trap etc . As the result ,average current of the pressure detector interface is less than 60?μA .更多还原