聰明的超低功耗設(shè)計

　　你熟悉的基本方法的低功耗設(shè)計。現(xiàn)在，你怎么把它帶到一個新水平？極端的低功耗嵌入式設(shè)計需要仔細(xì)選取工具緩存，電路設(shè)計和智能利用單片機(jī)超低功耗的特點(diǎn)。本文通過電路設(shè)計，元器件的選擇和一些細(xì)節(jié)，照顧和喂養(yǎng)的MCU，你需要減少你的下一個嵌入式設(shè)計的功率曲線。

　　工程師總是在學(xué)習(xí)和完善自己的手藝。隨著更多的便攜式電池供電設(shè)備的需求，并能收獲在地平線上，要求更低的功耗設(shè)計挑起一個缺口。首先，設(shè)計師為節(jié)約毫安，然后微安培。今天，它是所有關(guān)于節(jié)約納安。因此，設(shè)計師必須改變他們的思維到另一個層次。極端的低功耗嵌入式設(shè)計需要仔細(xì)選擇組件、工具緩存電路設(shè)計和單片機(jī)的低功耗特性，極端聰明的使用。

　　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.