硅表過濾器 |
0 |
當(dāng)手指觸摸到 感應(yīng)區(qū)域時,人體和金屬感應(yīng)片便組成了—個等效電容器(電容介質(zhì)就是陶瓷面板),人體上的各種感應(yīng)信號便通過此等效電容器耦合到模擬放大單元進(jìn)行放大,放大后,再經(jīng)整形電路變換后得到數(shù)字邏輯信號,即有人體信號時為“1”,無人體信號時為“0”。微處理器接受到相應(yīng)的數(shù)字邏輯信號后,便可以做出相應(yīng)的動作
。
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