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speedzzx

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civicli

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图看不到!
2楼2011-05-04 22:36:40
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speedzzx

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3楼2011-05-06 08:45:55
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COMEBOY

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【答案】应助回帖

speedzzx(金币+20): ok 2011-05-09 10:54:10
这里的R是电路的等效电阻;根据戴维南定理,从电容的两端看出去,电压源相当于短路,R1与R2形成并联。所以 R = R1R2 / (R1+R2) = 2/3 千欧 时间常数为RC=2/3 * 1500 = 1000微秒
4楼2011-05-06 16:05:51
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