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三極管

三極管欠壓復位電路

發布日期:2022-10-09 點擊率:78

欠壓復位電路工作原理(如圖所示)w 接通電源,+5V電壓從“0V”開始上升,在升至3.6V之前,穩壓二極管DH03都處于截止狀態,QH01(PNP管)也處于截止狀態,無復位電壓輸出。w 當+5V電源電壓高于3.6V以后,穩壓二極管DH03反向擊穿,將其兩端電壓“箝位”于3.6V。當+5V電源電壓高于4.3V以后,QH01開始導通,復位電壓開始形成,當+5V電源電壓接近+5V時,QH01已經飽和導通,復位電壓達到穩定狀態。

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