聪明的超低功耗设计

　　聪明的超低功耗设计

　　你熟悉的基本方法的低功耗设计。现在，你怎么把它带到一个新水平？极端的低功耗嵌入式设计需要仔细选取工具缓存，电路设计和智能利用单片机超低功耗的特点。本文通过电路设计，元器件的选择和一些细节，照顾和喂养的MCU，你需要减少你的下一个嵌入式设计的功率曲线。

　　工程师总是在学习和完善自己的手艺。随着更多的便携式电池供电设备的需求，并能收获在地平线上，要求更低的功耗设计挑起一个缺口。首先，设计师为节约毫安，然后微安培。今天，它是所有关于节约纳安。因此，设计师必须改变他们的思维到另一个层次。极端的低功耗嵌入式设计需要仔细选择组件、工具缓存电路设计和单片机的低功耗特性，极端聪明的使用。

　　Component Selection

　　Let‘s begin by taking a closer look at component selection. In particular， the capacitor in Figure 1 shows a model of a real capacitor. As we can see， this seemingly simple capacitor is actually a complex device. Value C is the capacitor value. RESR is the equivalent-series resistance from the capacitor leads， plates， and dielectric. LESL is the equivalent-series inductance from the capacitor leads and plates. RDA and CDA is the model of the capacitor’s dielectric absorption. RL is the capacitor leakage resistance. Each of these values differs by capacitor type （ceramic， electrolytic， tantalum， poly） and value. What we want to take away from this discussion is to be aware of where we are using capacitors in the circuit and look at ways to minimize current consumption. While designers normally don‘t look toward capacitors when designing an extreme low-power circuit， they can have a dramatic impact on power consumption.