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讨教下模拟开关电路怎么设计？

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讨教下模拟开关电路怎么设计？

浏览：53次 | 提问时间： 08-05 11:07

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3个答案

污界萌仙女 08-05 11:07

模拟开关电路开关电源的电路组成     开关电源的主要电路是由输入电磁干扰滤波器（EMI）、整流滤波电路、功率变换电路、PWM控制器电路、输出整流滤波电路组成。辅助电路有输入过欠压保护电路、输出过欠压保护电路、输出过流保护电路、输出短路保护电路等。

你没药就不要总提醒我有病 08-05 11:16

当接通电源时，VTl-VT4均处于截止状态，继电器线圈中无电流通过，继电器常开触点断开，发光二极管VD2不亮。当用手指触摸一下“开”开关，电源经手指电阻(约几百至几千欧)，R2注入VT3基极，复合管VT3、VT4导通，继电器线圈中有电流通过，常开触点闭合，VD2亮。由于常开开关闭合，R3接入VT3基极回路，手指离开电极后，VT3、VT4仍能保持导通状态。需要熄灭时，可以摸一下“关”电极片，由于正电源经手指电阻、Rl注入VT1基极，VT1、VT2导通，VT1、VT2的集电极电位下降。　　即VT3的基极电位下降，VT3、VT4由导通状态转为截止状态，继电器线圈中无电流通过，常开触点断开，VD2熄灭。希望我的回答能帮到你

你是我的独家记忆 08-05 11:24

模拟开关电路的设计方法：一：灯位设计一般都是根据房间大小来设计灯的个数以及大小，灯的位置要剧中。二：每个房间的开关应该设计在门口开门的位置【不要设计在门的后方】距地面一般都是一米三。如果是卧室可以设计双控开关。

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